Posts with «ethernet» label

RetroModem for the Commodore 64

Retrocomputers are fun, but ultimately limited in capability compared to modern hardware. One popular pursuit to rectify this is the connection of early home computers to the Internet. To that end, [que] built the Retromodem for the Commodore 64.

The build starts with a case from an Intel 14.4 modem. A little fast for the Commodore 64 era, but anachronism is charming when done tastefully. Inside is an Arduino with an ethernet module to handle the heavy lifting of carrying packets to the outside world.  [que] took the time to wire up status LEDs for the proper vintage look, which really adds something to the project. They switch on and off to indicate the various settings on the modem – it’s great to see in the video below the break the “HS” LED light up when the baud rate is changed to a higher speed.

The project implements most of the Hayes command set, so you can interface with it over a serial terminal just like it’s 1983. [que] doesn’t go into too many details of how it’s all put together, but for the experienced code warrior it’s a project that could be whipped up in a weekend or two. For a more modern take, perhaps you’d like to hook your C64 up over Wifi instead?


Filed under: classic hacks, computer hacks

Get Arduino Data over the internet using jQuery and AJAX





Description


Have you ever wanted to transmit Arduino data over the internet?

In this tutorial, we will design a web page that will retrieve Analog readings from the Arduino's Analog Pins and display them on a bar chart within the web page.

The web page will use jQuery and AJAX to request the data from the Arduino Web Server, allowing us to update the bar chart dynamically, without having to refresh the entire web page. The Arduino Web Server will send the Analog readings to the web page in JSON format where it will be processed and displayed accordingly.

In this tutorial, I will not have anything connected to the Arduino's Analog pins, which means the data retrieved will be that of randomly floating analog pins. Feel free to connect a potentiometer, temperature sensor or any other analog sensor to these pins if you want to create a more "useful" project.

The main aim here was to show you how to transmit the data in JSON format, and to update only a portion of the web page using asynchronous communication (using AJAX), to improve the performance of data retrieval and visualisation.


Parts Required:




Please note: The WIZnet ioShield-A ver1.1 actually comes with the WIZ550io board. So if you buy the ioShield-A, you will receive both boards. I have provided the link to the WIZ550io shield because you can buy that shield on its own. Regardless, you will need to use both boards for this tutorial.


Arduino Libraries and IDE


To program the Arduino you will need to download the Arduino IDE, and install the WIZnet Ethernet Library. The Arduino IDE version used in this tutorial was version 1.6.4.
You may want to read the WIZnet wiki information for each WIZnet shield before use.


 

ARDUINO CODE:


Full description of the Arduino code is included in the YouTube video above. Once you have set up your Arduino Web Server, you should be able to ping it. Look at this website, if you don't know how to use the windows ping feature.


Getting the Arduino Board onto the internet:


There isn't anything really to hook up for this project. You just have to align the pins for each board and stack them. You can power the Arduino via the USB cable. This will also be useful for debugging and printing to the Serial monitor. An ethernet cable needs to connect the WIZ550io board's ethernet port to your internet/network router

  • The WIZ550io board goes on the top

  • The ioShield-A is in the middle

  • The Arduino UNO is on the bottom

  • This is what it looks like when they are stacked together

  • If you want to gain easy access to the Analog or digital pins without de-soldering the ioShield-A, you can introduce some female headers like this:

  • Please note that the ioShield-A utilises a number of pins on the Arduino UNO - including: D2, D4, D7, D10, GND, and IOREF, RESET, 5V, GND, GND and ICSP pins
  • All Analog pins are available for use


 

Set the Arduino Web Server on your local network


You can test this project on your local network. You just have to choose an available IP address and PORT within your router's IP range. If you don't know your local IP address range - you can have a look at this site to give you a helping hand.


Set the Arduino Web Server to be accessed from anywhere in the world


If you want to access your Arduino from anywhere in the world, you need to set up Port Forwarding on your internet network router. The following useful guides will hopefully get you on the right track, if you have never set up Port forwarding.


In my case, I programmed the Arduino UNO Web Server to take the following ip address on my internal network: 10.1.1.99

I programmed the Arduino Web Server to listen for Web Browsers on port 8081.
So if I wanted to connect to the Arduino Web Server through my home network, I just had to type in this web address into my web browser: http://10.1.1.99:8081

If you plan to connect to the Arduino using port 80 (which is the default port for web browsers), you can just type the IP address without specifying the port (eg. http://10.1.1.99/ )

The web browser should display the Arduino data in JSON format (the YouTube video above will show you what that looks like).

Once I knew I could connect to the Arduino in my internal network, I then set up port forwarding on my router so that I could type in my external IP address and special port to tunnel my way into my Arduino Web Server on my internal network. This is what I had to do on my router, but you may need to do something different.

  1. My first step was to find out my public/external IP address by typing "what is my IP address" into google. If you want to know your external IP address click here.
  2. I then typed my router's ip address into a web browser, and logged into my router.
  3. I went to the advanced settings tab
  4. Selected "Port Forwarding" from the side menu
  5. Filled out all of the details on the first line of the Ports list
    • Enable box = ticked
    • Description = Arduino
    • WAN interface = pppoe_atm0/ppp0
    • Inbound port = 8082
    • Type = TCP
    • Private IP address = 10.1.1.99
    • Private port = 8081
  6. Saved the settings

Now that I had port forwarding enabled, I could type the ip address (that I obtained in step 1) into my browser and specified port 8082 (instead of 8081) - eg. http://190.11.70.253:8082/

And now I can access my Arduino Web server from anywhere in the world. I can even access it from my smart phone. Once again, this will only return the Analog data in JSON format.


The Web Page GUI


The Arduino is now on the internet, so there are two options. You can either


Instructions on how to use these web pages, are listed below the HTML code.


To retrieve data from your Arduino Web Server, please make sure that it is connected and visible from outside of you local network. You will need to have port forwarding enabled. Information on port forwarding is described above.
  1. Find what your external IP address is.
  2. Enter this address using the IP address drop-down boxes within the "ArduinoBasics Webserver Data viewer" web page
  3. Enter the port forwarding port number (eg. 8082) into the box labelled "Port"
  4. Then click on the "Click here to start getting data" button - you should start to see the bar charts moving and status should be OK
  5. If the bar charts do not move, and the status message says "Failed to get DATA!!" - then the web page was unable to connect to the Arduino for some reason.



Troubleshooting

  • You may want to type in the web address into your web browser, to make sure that data is being retrieved.
  • You can also open the Serial monitor in the Arduino IDE to make sure that an IP address is being displayed
  • Ensure that you have enabled the port forwarding option on your router
  • Have a look at Developer Tools within Google Chrome to help diagnose web page related issues.
  • The web page will not work properly if you use Internet Explorer or if you have javascript disabled within your browser.


Concluding comments


This tutorial showed you how to connect to your Arduino UNO over the internet, and retrieve data in JSON format using jQuery and AJAX. The web page can be modified to suit your own needs, plus it would be more useful if the Arduino was actually monitoring something, rather than logging data from floating pins. It would also be useful if the Arduino could be controlled to blink an LED, or to turn a motor... but I will leave that project for another day. Thank you.

If you like this page, please do me a favour and show your appreciation :

 
Visit my ArduinoBasics Google + page.
Follow me on Twitter by looking for ScottC @ArduinoBasics.
I can also be found on Pinterest and Instagram.
Have a look at my videos on my YouTube channel.
             
This project would not have been possible without WIZnet's collaborative effort.
Please visit their site for more cool Ethernet products.


However, if you do not have a google profile...
Feel free to share this page with your friends in any way you see fit.

Get Arduino Data over the internet using jQuery and AJAX

Description

Have you ever wanted to transmit Arduino data over the internet?

In this tutorial, we will design a web page that will retrieve Analog readings from the Arduino's Analog Pins and display them on a bar chart within the web page.

The web page will use jQuery and AJAX to request the data from the Arduino Web Server, allowing us to update the bar chart dynamically, without having to refresh the entire web page. The Arduino Web Server will send the Analog readings to the web page in JSON format where it will be processed and displayed accordingly.

In this tutorial, I will not have anything connected to the Arduino's Analog pins, which means the data retrieved will be that of randomly floating analog pins. Feel free to connect a potentiometer, temperature sensor or any other analog sensor to these pins if you want to create a more "useful" project.

The main aim here was to show you how to transmit the data in JSON format, and to update only a portion of the web page using asynchronous communication (using AJAX), to improve the performance of data retrieval and visualisation.



Arduino Libraries and IDE

To program the Arduino you will need to download the Arduino IDE, and install the WIZnet Ethernet Library. The Arduino IDE version used in this tutorial was version 1.6.4.
You may want to read the WIZnet wiki information for each WIZnet shield before use.


 

ARDUINO CODE:

Full description of the Arduino code is included in the YouTube video above. Once you have set up your Arduino Web Server, you should be able to ping it. Look at this website, if you don't know how to use the windows ping feature.


Getting the Arduino Board onto the internet:

There isn't anything really to hook up for this project. You just have to align the pins for each board and stack them. You can power the Arduino via the USB cable. This will also be useful for debugging and printing to the Serial monitor. An ethernet cable needs to connect the WIZ550io board's ethernet port to your internet/network router

  • The WIZ550io board goes on the top

  • The ioShield-A is in the middle

  • The Arduino UNO is on the bottom

  • This is what it looks like when they are stacked together

  • If you want to gain easy access to the Analog or digital pins without de-soldering the ioShield-A, you can introduce some female headers like this:

  • Please note that the ioShield-A utilises a number of pins on the Arduino UNO - including: D2, D4, D7, D10, GND, and IOREF, RESET, 5V, GND, GND and ICSP pins
  • All Analog pins are available for use


 

Set the Arduino Web Server on your local network

You can test this project on your local network. You just have to choose an available IP address and PORT within your router's IP range. If you don't know your local IP address range - you can have a look at this site to give you a helping hand.


Set the Arduino Web Server to be accessed from anywhere in the world

If you want to access your Arduino from anywhere in the world, you need to set up Port Forwarding on your internet network router. The following useful guides will hopefully get you on the right track, if you have never set up Port forwarding.


In my case, I programmed the Arduino UNO Web Server to take the following ip address on my internal network: 10.1.1.99

I programmed the Arduino Web Server to listen for Web Browsers on port 8081.
So if I wanted to connect to the Arduino Web Server through my home network, I just had to type in this web address into my web browser: http://10.1.1.99:8081

If you plan to connect to the Arduino using port 80 (which is the default port for web browsers), you can just type the IP address without specifying the port (eg. http://10.1.1.99/ )

The web browser should display the Arduino data in JSON format (the YouTube video above will show you what that looks like).

Once I knew I could connect to the Arduino in my internal network, I then set up port forwarding on my router so that I could type in my external IP address and special port to tunnel my way into my Arduino Web Server on my internal network. This is what I had to do on my router, but you may need to do something different.

  1. My first step was to find out my public/external IP address by typing "what is my IP address" into google. If you want to know your external IP address click here.
  2. I then typed my router's ip address into a web browser, and logged into my router.
  3. I went to the advanced settings tab
  4. Selected "Port Forwarding" from the side menu
  5. Filled out all of the details on the first line of the Ports list
    • Enable box = ticked
    • Description = Arduino
    • WAN interface = pppoe_atm0/ppp0
    • Inbound port = 8082
    • Type = TCP
    • Private IP address = 10.1.1.99
    • Private port = 8081
  6. Saved the settings

Now that I had port forwarding enabled, I could type the ip address (that I obtained in step 1) into my browser and specified port 8082 (instead of 8081) - eg. http://190.11.70.253:8082/

And now I can access my Arduino Web server from anywhere in the world. I can even access it from my smart phone. Once again, this will only return the Analog data in JSON format.


The Web Page GUI

The Arduino is now on the internet, so there are two options. You can either

Instructions on how to use these web pages, are listed below the HTML code.



To retrieve data from your Arduino Web Server, please make sure that it is connected and visible from outside of you local network. You will need to have port forwarding enabled. Information on port forwarding is described above.

  1. Find what your external IP address is.
  2. Enter this address using the IP address drop-down boxes within the "ArduinoBasics Webserver Data viewer" web page
  3. Enter the port forwarding port number (eg. 8082) into the box labelled "Port"
  4. Then click on the "Click here to start getting data" button - you should start to see the bar charts moving and status should be OK
  5. If the bar charts do not move, and the status message says "Failed to get DATA!!" - then the web page was unable to connect to the Arduino for some reason.



Troubleshooting

  • You may want to type in the web address into your web browser, to make sure that data is being retrieved.
  • You can also open the Serial monitor in the Arduino IDE to make sure that an IP address is being displayed
  • Ensure that you have enabled the port forwarding option on your router
  • Have a look at Developer Tools within Google Chrome to help diagnose web page related issues.
  • The web page will not work properly if you use Internet Explorer or if you have javascript disabled within your browser.

Concluding comments

This tutorial showed you how to connect to your Arduino UNO over the internet, and retrieve data in JSON format using jQuery and AJAX. The web page can be modified to suit your own needs, plus it would be more useful if the Arduino was actually monitoring something, rather than logging data from floating pins. It would also be useful if the Arduino could be controlled to blink an LED, or to turn a motor... but I will leave that project for another day. I hope you enjoyed this tutorial - if it helped you in any way, please consider donating a small "tip" into my money jar. Thank you.


If you like this page, please do me a favour and show your appreciation :

 
Visit my ArduinoBasics Google + page.
Follow me on Twitter by looking for ScottC @ArduinoBasics.
I can also be found on Pinterest and Instagram.
Have a look at my videos on my YouTube channel.

             

This project would not have been possible without WIZnet's collaborative effort.
Please visit their site for more cool Ethernet products.



However, if you do not have a google profile...
Feel free to share this page with your friends in any way you see fit.

Bread Online is a Bread Maker for the Internet of Things

An engineering student at the University of Western Macedonia has just added another appliance to the ever-growing list of Internet enabled things. [Panagiotis] decided to modify an off-the-shelf bread maker to enable remote control via the Internet.

[Panagiotis] had to remove pretty much all of the original control circuitry for this device. The original controller was replaced with an Arduino Uno R3 and an Ethernet shield. The temperature sensor also needed to be replaced, since [Panagiotis] could not find any official documentation describing the specifications of the original. Luckily, the heating element and mixer motor were able to be re-used.

A few holes were drilled into the case to make room for the Ethernet connector as well as a USB connector. Two relays were used to allow the Arduino to switch the heating element and mixer motor on and off. The front panel of the bread maker came with a simple LCD screen and a few control buttons. Rather than let those go to waste, they were also wired into the Arduino.

The Arduino bread maker can be controlled via a web site that runs on a separate server. The website is coded with PHP and runs on Apache. It has a simple interface that allows the user to specify several settings including how much bread is being cooked as well as the desired darkness of the bread. The user can then schedule the bread maker to start. Bread Online also comes with an “offline” mode so that it can be used locally without the need for a computer or web browser. Be sure to check out the video demonstration below.

[Thanks Minas]


Filed under: Arduino Hacks, cooking hacks

An Arduino Device that Monitors Your External IP Address

[Bayres’] dad setup a webcam as a surveillance camera for a remote property. The only problem was that the only stable Internet connection they could get at this property was DSL. This meant that the external IP address of the webcam would change somewhat often; the needed a way to keep track of the external IP address whenever it changed. That’s when [Bayres] built a solution using Arduino and an Ethernet shield.

The main function of this device is to monitor the public IP address and report any changes. This is accomplished by first making a request to checkip.dyndns.org. This website simply reports your current public IP address. [Bayres] uses an Arduino library called Textfinder in order to search through the returned string and identify the IP address.

From there, the program compares this current value to the previous one. If there is any change, the program uses the Sendmail() function to reach out to an SMTP server and send an e-mail alert to [Beyres’] dad. The system also includes a small LCD. The Arduino outputs the current IP address to this display, making it easy to check up on the connection. The LCD is driven by 74HC595 shift register in order to conserve pins on the Arduino.

The system is also designed with a pretty slick setup interface. When it is booted, the user can enter a configuration menu via a Serial terminal. This setup menu allows the user to configure options such as SMTP server, email address, etc. These variables are then edited and can be committed to EEPROM as a more permanent storage solution. Whenever the system is booted, these values are read back out of the EEPROM and returned to their appropriate variables. This means you can reconfigure the device on the fly without having to edit the source code and re-upload.


Filed under: Arduino Hacks

Weather Reporter - Temboo, Ethernet and Arduino


 

Arduino is well known for the large variety of sensors / modules that can be connected. It is quite easy to hook up a temperature or humidity sensor to get instant feedback about the surrounding environmental conditions. However, sometimes you do not have a temperature sensor. Sometimes you have a sensor, but would like to know the temperature in other cities ! Or you would like to know what the temperature will be tomorrow?

Well now you can !!

All you need is a Temboo account, an internet connection and the following components:

Parts Required


 
 

Project Description


An Arduino UNO (and Ethernet Shield) queries Yahoo using a Temboo account, and retrieves weather information. The data is filtered and processed, and then passed on to another Arduino UNO to be displayed on a TFT LCD module. Two Arduino UNOs are used because the Ethernet library and the UTFT library are both memory hungry, and together consume more memory than one Arduino UNO can handle. Yes - I could have used a different board such as the Arduino MEGA, but where is the fun in that ?? This project will teach you many things:
  • How to use an Ethernet Shield with a Temboo account to retrieve internet data
  • How to use a TFT LCD module (ITDB02-1.8SP)
  • How to reduce memory consumption when using the UTFT library
  • How to power two Arduinos with a single USB cable
  • How to transmit data from one Arduino to another (via jumper wires)
All of this and a whole lot more !!


 
 

Video

Have a look at the following video to see the project in action.
 




You will need to create a Temboo account to run this project:

Temboo Account Creation

Step 1:

Visit the Temboo website : https://www.temboo.com/ Create an account by entering a valid email address. Then click on the Sign Up button.

 

 

Step 2:

Verify your email address by clicking on the link provided in the email sent by Temboo.

 

Step 3:

You will be directed to the account setup page: Create an Account Name, and Password for future access to your Temboo Account Check the terms of service and if you agree, then tick the box Press the Go! button

 

 

Step 4:

You will then encounter the "Welcome!" screen:

 

 

Step 5:

Navigate to the top right of the screen and select the LIBRARY tab

 

 

Step 6:

On the left hand side you will see a list of choreos. Type Yahoo into the search box on the top left of the screen. Navigate to the GetWeatherByAddress Choreo by clicking on...     Yahoo _ Weather _ GetWeatherByAddress

 

 

Step 7:

Turn the IoT Mode to ON (in the top right of screen)

 

 

Step 8:

What's your platform / device? : Arduino How is it connected? : Arduino Ethernet   The following popup box will appear:

 

 

Step 9:

Name: EthernetShield - you can choose any name. Letters and numbers only. No spaces. Shield Type: Arduino Ethernet MAC Address : You can normally find the MAC address of the Ethernet shield on the underside. Enter the MAC address without the hyphens. Then click SAVE.

 

 

Step 10:

Move to the INPUT section. Enter the Address of the place you want the Temperature for. Address = Perth, Western Australia Expand the Optional INPUT for extra functionality Units = c - If you want the temperature in Celcius.

 

 

Step 11:

This will automatically generate some Arduino CODE and a HEADER FILE. Don't worry about the Arduino code for now... because I will provide that for you. However, you will need the automatically generated HEADER file. I will show you what to do with that soon. So don't lose it !'



Temboo Library Install

The Temboo library will need to be installed before you copy the Arduino code in the sections below. To install the Temboo library into your Arduino IDE, please follow the link to their instructions:   Installing the Temboo Arduino Library

   

UTFT Library Install

Download the UTFT library from this site: http://www.henningkarlsen.com/electronics/library.php?id=51 Once downloaded and extracted. Go into the UTFT folder and look for the memorysaver.h file. Open this file in a text editor, and "uncomment" all of the TFT modules that are not relevant to this project. I disabled all of the TFT modules except the last 3 (which made reference to ST7735) - see picture below. The TFT module we are using in this project is the ITDB02-1.8SP from ITEAD Studio. Save the memorysaver.h file, and then IMPORT the library into the Arduino IDE as per the normal library import procedure.   If you do not modify the memorysaver.h file, the Arduino SLAVE sketch will not compile.

   

Arduino Code (MASTER)

  This project uses 2 Arduino UNOs. One will be the Master, and one will be the Slave. The following code is for the Arduino MASTER.   Open up the Arduino IDE. (I am using Arduino IDE version 1.6) Paste the following code into the Arduino IDE code window.   PLEASE NOTE: You may need to change some of the lines to accomodate your INPUTS from step 10. Have a look around line 36 and 37.  
  1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187


/* ===============================================================================
      Project: Weather Reporter: Temboo, Ethernet, Arduino
        Title: ARDUINO MASTER: Get temperature from Yahoo using Temboo
       Author: Scott C
      Created: 27th February 2015
  Arduino IDE: 1.6.0
      Website: http://arduinobasics.blogspot.com/p/arduino-basics-projects-page.html
  Description: The following sketch was designed for the Arduino MASTER device. 
               It will retrieve temperature/weather information from Yahoo using your
               Temboo account (https://www.temboo.com/), which will then be sent to the
               Arduino Slave device to be displayed on a TFT LCD module.
               
   Libraries : Ethernet Library (that comes with Arduino IDE)
               Temboo Arduino Library - https://www.temboo.com/sdk/arduino
               
   Temboo Library installation instructions for Arduino: 
               https://www.temboo.com/arduino/others/library-installation

  You will also need to copy your Temboo Account information into a new tab and call it TembooAccount.h.
  Please follow the instructions on the ArduinoBasics blog for more information.
---------------------------------------------------------------------------------- */

#include <SPI.h>
#include <Dhcp.h>
#include <Dns.h>
#include <Ethernet.h>
#include <EthernetClient.h>
#include <Temboo.h>
#include "TembooAccount.h" // Contains Temboo account information - in a new tab.
#include <Wire.h>

byte ethernetMACAddress[] = ETHERNET_SHIELD_MAC; //ETHERNET_SHIELD_MAC variable located in TembooAccount.h
EthernetClient client;

String Address = "Perth, Western Australia"; // Find temperature for Perth, Western Australia
String Units = "c"; // Display the temperature in degrees Celcius

String ForeCastDay[7]; //String Array to hold the day of the week
String ForeCastTemp[7]; //String Array to hold the temperature for that day of week.

int counter1=0; //Counters used in FOR-LOOPS.
int counter2=0;

boolean downloadTemp = true; // A boolean variable which controls when to query Yahoo for Temperature information.



void setup() {
  Wire.begin(); // join i2c bus : Used to communicate to the Arduino SLAVE device.
 
  // Ethernet shield must initialise properly to continue with sketch.
  if (Ethernet.begin(ethernetMACAddress) == 0) {
    while(true);
  }
  
  //Provide some time to get both Arduino's ready for Temperature Query.
    delay(2000);
}




void loop() {
  if (downloadTemp) {
    downloadTemp=false; //Stop Arduino from Querying Temboo repeatedly
    getTemperature();       //Retrieve Temperature data from Yahoo
    transmitResults();      //Transmit the temperature results to the Slave Arduino
  }
}




/* This function will Query Yahoo for Temperature information (using a Temboo account) */

void getTemperature(){
    TembooChoreo GetWeatherByAddressChoreo(client);

    // Invoke the Temboo client
    GetWeatherByAddressChoreo.begin();

    // Set Temboo account credentials
    GetWeatherByAddressChoreo.setAccountName(TEMBOO_ACCOUNT); //TEMBOO_ACCOUNT variable can be found in TembooAccount.h file or tab
    GetWeatherByAddressChoreo.setAppKeyName(TEMBOO_APP_KEY_NAME); //TEMBOO_APP_KEY_NAME variable can be found in TembooAccount.h file or tab
    GetWeatherByAddressChoreo.setAppKey(TEMBOO_APP_KEY); //TEMBOO_APP_KEY variable can be found in TembooAccount.h file or tab

    // Set Choreo inputs
    GetWeatherByAddressChoreo.addInput("Units", Units); // Set the Units to Celcius
    GetWeatherByAddressChoreo.addInput("Address", Address); // Set the Weather Location to Perth, Western Australia

    // Identify the Choreo to run
    GetWeatherByAddressChoreo.setChoreo("/Library/Yahoo/Weather/GetWeatherByAddress");

    // This output filter will extract the expected temperature for today
    GetWeatherByAddressChoreo.addOutputFilter("Temperature", "/rss/channel/item/yweather:condition/@temp", "Response");
    
    // These output filters will extract the forecasted temperatures (we need to know the day and temperature for that day)
    GetWeatherByAddressChoreo.addOutputFilter("ForeCastDay", "/rss/channel/item/yweather:forecast/@day", "Response");
    GetWeatherByAddressChoreo.addOutputFilter("ForeCastHigh", "/rss/channel/item/yweather:forecast/@high", "Response");

    // Run the Choreo;
    GetWeatherByAddressChoreo.run();

    //Reset our counters before proceeding
    counter1 = 0;
    counter2 = 0;
    
    while(GetWeatherByAddressChoreo.available()) {
      // This will get the first part of the output
      String name = GetWeatherByAddressChoreo.readStringUntil('\x1F');
      name.trim(); // get rid of newlines

      // This will get the second part of the output
      String data = GetWeatherByAddressChoreo.readStringUntil('\x1E');
      data.trim(); // get rid of newlines

      //Fill the String Arrays with the Temperature/Weather data
      if (name == "Temperature") {
        ForeCastDay[counter1] = "Today";
        ForeCastTemp[counter2] = data;
        counter1++;
        counter2++;
      }
      
      if(name=="ForeCastDay"){
        ForeCastDay[counter1] = data;
        counter1++;
      }
      
      if(name=="ForeCastHigh"){
        ForeCastTemp[counter2] = data;
        counter2++;
      }
    }
  
    //Close the connection to Temboo website
    GetWeatherByAddressChoreo.close();
  }
  
  
  
  
  /* This function is used to transmit the temperature data to the Slave Arduino */
  
  void transmitResults(){
    char tempData[10];
    int tempStringLength = 0;
    
    //Modify the current temp to "Now"
    ForeCastDay[0] = "Now";
    
    //Send * to Slave Arduino to prepare for Temperature Transmission
    Wire.beginTransmission(4); // Transmit to device #4 (Slave Arduino)
    Wire.write("*");
    delay(500);
    Wire.endTransmission();
    delay(500);
    
    //Send the temperatures on the Slave Arduino to be displayed on the TFT module.
    for (int j=0; j<20; j++){
      for (int i=0; i<6; i++){
        memset(tempData,0,sizeof(tempData));   //Clear the character array
        String tempString = String(ForeCastDay[i] + "," + ForeCastTemp[i] + ".");
        tempStringLength = tempString.length();
        tempString.toCharArray(tempData, tempStringLength+1);
        Wire.beginTransmission(4); // Transmit to device #4 (Slave Arduino)
        Wire.write(tempData);
        delay(1000);
        Wire.endTransmission();
        delay(4000);
      }
    }
    
    /* ----------------------------------------------------------------------
    // You can use this to send temperature results to the Serial Monitor.
    // However, you will need a Serial.begin(9600); statement in setup().
    
    Serial.println("The Current Temperature is " + ForeCastTemp[5] + " C");
    Serial.println();
    Serial.println("The Expected Temperature for");
    for (int i=0; i<5; i++){
      Serial.println(ForeCastDay[i] + " : " + ForeCastTemp[i] + " C");
    }
    ---------------------------------------------------------- */
  }
  

 
 
 
Select "New Tab" from the drop-down menu on the top right of the IDE. Name the file: TembooAccount.h

Paste the contents of the HEADER file from the Temboo webpage (Step 11 above) into the TembooAccount.h tab. If you do not have the TembooAccount.h tab with the contents of this HEADER file next to your Arduino Master sketch, then it will NOT work.  
Make sure to SAVE the Arduino Sketch and upload the code to the Arduino (MASTER)

   

Arduino Code (SLAVE)

  This project uses 2 Arduino UNOs. One will be the Master, and one will be the Slave. The following code is for the Arduino SLAVE.   Make sure to disconnect the Arduino MASTER from your computer, and keep it to one side. Connect the Arduino SLAVE to your computer, and upload the following code to it. Make sure to create a new sketch for this code (File _ New).  
  1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197


/* ===============================================================================
      Project: Weather Reporter: Temboo, Ethernet, Arduino
        Title: ARDUINO SLAVE: Display temperature on TFT LCD Module
       Author: Scott C
      Created: 27th February 2015
  Arduino IDE: 1.6.0
      Website: http://arduinobasics.blogspot.com/p/arduino-basics-projects-page.html
  Description: The following sketch was designed for the Arduino SLAVE device. 
               It will receive temperature information from the Arduino MASTER
               and then display this information on the ITDB02-1.8SP TFT LCD 
               Module. Please read the important notes below.

----------------------------------------------------------------------------------
NOTES:
This sketch makes use of the UTFT.h library from : 
http://www.henningkarlsen.com/electronics/library.php?id=51
Please note: You will need to modify the memorysaver.h file in the UTFT folder 
with a text editor to disable any unused TFT modules. This will save memory, 
and allow you to run this sketch on an Arduino UNO. I disabled all TFT modules in
that file except the last 3 (which made reference to ST7735).
I used a ITDB02-1.8SP TFT LCD Module from ITEAD Studio.
PinOut:

Arduino SLAVE      ITDB02-1.8SP TFT
         3.3V ---- VDD33
 Digital9 (D9)---- CS
 Digital8 (D8)---- SCL
 Digital7 (D7)---- SDA
 Digital6 (D6)---- RS
 Digital5 (D5)---- RST
          GND ---- GND
           5V ---- VIN

Usage: UTFT myGLCD(<model code>, SDA, SCL, CS, RST, RS);
Example: UTFT myGLCD(ITDB18SP,7,8,9,5,6);

-----------------------------------------------------------------------------------
This sketch also makes use of the Wire.h library. 
The Wire.h library comes with the Arduino IDE.
This enables communication between Arduino Master and Arduino Slave.
PinOut:

Arduino MASTER      Arduino SLAVE
   Analog4(A4) ---- Analog4 (A4) 
   Analog5(A5) ---- Analog5 (A5) 
           GND ---- GND

-----------------------------------------------------------------------------------
The Arduino Slave is powered by the Arduino Master:
PinOut:

Arduino MASTER      Arduino SLAVE
            5V ---- VIN

==================================================================================
*/

#include <UTFT.h>
#include <Wire.h>

//Declare all of the fonts
extern uint8_t SmallFont[];
extern uint8_t BigFont[];
extern uint8_t SevenSegNumFont[];

// Usage: UTFT myGLCD(<model code>, SDA, SCL, CS, RST, RS);
UTFT myGLCD(ITDB18SP,7,8,9,5,6);

boolean tempDisplay = false; //Helps with processing the data from the Arduino MASTER
boolean readTemp = false; //Helps to differentiate the day from the temperature values
String dayOfWeek=""; //Variable used to hold the Day of the Week
String tempReading=""; //Variable used to hold the Temperature for that day

String Units = "'C "; //Display Temperature in Celcius
String Address = "Perth, WA"; //Address to show at top of Display


void setup(){
  // Initialise the TFT LCD
  myGLCD.InitLCD();
  initialiseLCD();
  delay(5000);
  
  //Setup the Serial communication between the Arduino MASTER and SLAVE
  Wire.begin(4); // join i2c bus with address #4
  Wire.onReceive(receiveEvent); // register event
}



void loop(){
  delay(50);
}


/*
  This function initialises the TFT LCD, and draws the initial screen.
*/
void initialiseLCD(){
  //Clear the screen
  myGLCD.clrScr();
  
  //Draw the borders (top and bottom)
  myGLCD.setColor(25, 35, 4);
  myGLCD.fillRect(0, 0, 159, 13);
  myGLCD.fillRect(0, 114, 159, 127);
  myGLCD.drawLine(0,18,159,18);
  myGLCD.drawLine(0,109,159,109);
  
  //Header and Footer Writing
  myGLCD.setColor(255, 255, 255);
  myGLCD.setBackColor(25, 35, 4);
  myGLCD.setFont(SmallFont);
  myGLCD.print("arduinobasics", CENTER, 1);
  myGLCD.print("blogspot.com", CENTER, 114);
}




/* This function executes whenever data is received from Arduino master
   It will ignore all data from the Master until it receives a '*' character.
   Once this character is received, it will call the receiveTemp() function
   in order to receive Temperature data from the Arduino Master.
*/
void receiveEvent(int howMany){
  if(tempDisplay){
    receiveTemp();
  }else{
    while(0 < Wire.available()){
      char c = Wire.read(); // receive byte as a character
      if(c=='*'){ // Searching for a '*' character
        tempDisplay=true; // If '*' received, then call receiveTemp() function
      }
    }
  }
}



/* This function is used to receive and process the Temperature data 
   from the Arduino Master and pass it on to the  displayTemp() funtion.
*/
void receiveTemp(){
  tempReading="";
  dayOfWeek = "";
  
  while(0 < Wire.available()){
    char c = Wire.read(); // receive byte as a character
    if(readTemp){
      if(c=='.'){ // If a . is detected. It is the end of the line.
        readTemp=false;
      }else{
        tempReading=tempReading+c;
      }
    }else{
      if(c==','){
      } else {
        dayOfWeek=dayOfWeek+c;
      }
    }
    if(c==','){
      readTemp=true;
    }
  }
  displayTemp();
}



/*
  Display the Temperature readings on the TFT LCD screen.
*/
void displayTemp(){
  //Clear the writing on top and bottom of screen
  myGLCD.setColor(25, 35, 4);
  myGLCD.fillRect(0, 0, 159, 13);
  myGLCD.fillRect(0, 114, 159, 127);
  
  //Small writing on top and bottom of screen
  myGLCD.setColor(255, 255, 255);
  myGLCD.setBackColor(25, 35, 4);
  myGLCD.setFont(SmallFont);
  myGLCD.print(Address, CENTER, 1);
  myGLCD.print(dayOfWeek, CENTER, 114);
  
  //Write the big temperature reading in middle of screen
  myGLCD.setBackColor(0, 0, 0);
  myGLCD.setFont(SevenSegNumFont);
  myGLCD.print(tempReading, CENTER, 40);
  
  //Write the Units next to the temperature reading
  myGLCD.setFont(BigFont);
  myGLCD.print(Units, RIGHT, 40);
}

 
 
 

Wiring it up

Once the code has been uploaded to both Arduinos (Master and Slave), I tend to label each Arduino so that I don't mix them up. You will notice an 'S' marked on the SLAVE in some of the photos/videos. Then it is time to piggy-back the shields onto the Arduinos and wire them up. Make sure you disconnect the USB cable from the Arduinos before you start doing this.

 

Step 1: Ethernet Shield

Place the Ethernet shield onto the Arduino MASTER. Connect an Ethernet cable (RJ45) to the Ethernet shield. The other end will connect to your internet router.

 
 

Step 2: Arduino SLAVE and TFT LCD module

 
You can either wire up the TFT LCD module on a breadboard, or you can use a ProtoShield with mini-breadboard. It doesn't really matter how you hook it up, but make sure you double check the connections and the TFT specifications before you power it up. I have powered the Arduino Slave by connecting it to the Arduino Master (see fritzing sketch below).  
There is no reason why you couldn't just power the slave seperately. In fact this is probably the safer option. But I read that this power-sharing setup was ok, so I wanted to give it a go. I have no idea whether it would be suitable for a long term power project... so use it at your own risk. I tried using 4 x AA batteries to power this circuit, but found that the LCD screen would flicker. So then I tried a 9V battery, and noticed that the 5V voltage regulator was heating up more than I felt comfortable with. In the end, I settled with the USB option, and had no further issues. I am sure there are other possible options, and feel free to mention them in the comments below.  
Use the following fritzing sketch and tables to help you wire this circuit up.

 

Fritzing sketch

 

 
 

 

Arduino MASTER to SLAVE connection table

 

 
 

 

Arduino SLAVE to ITDB02-1.8SP TFT LCD

 

 
 

ITDB02-1.8SP TFT LCD Module Pictures

 

 

 
 

Project Pictures

 

 

 

 



If you like this page, please do me a favour and show your appreciation :

 
Visit my ArduinoBasics Google + page.
Follow me on Twitter by looking for ScottC @ArduinoBasics.
Have a look at my videos on my YouTube channel.


 
 

 
 
 



However, if you do not have a google profile...
Feel free to share this page with your friends in any way you see fit.

Display Your City’s Emotional State with Illuminated Snow

[Hunter] wanted to do something a bit more interesting for his holiday lights display last year. Rather than just animated lights, he wanted something that was driven by data. In this case, his display was based on the mood of people in his city. We’ve seen a very similar project in the past, but this one has a few notable differences.

The display runs off of an Arduino. [Hunter] is using an Ethernet shield to connect the Arduino to the Internet. It then monitors all of the latest tweets from users within a 15 mile radius of his area. The tweets are then forwarded to the Alchemy Sentiment API for analysis. The API uses various algorithms and detection methods to identify the overall sentiment within a body of text. [Hunter] is using it to determine the general mood indicated by the text of a given tweet.

Next [Hunter] needed a way to somehow display this information. He opted to use an LED strip. Since the range of sentiments is rather small, [Hunter] didn’t want to display the overall average sentiment. This value doesn’t change much over short periods of time, so it’s not very interesting to see. Instead, he plots the change made since the last sample. This results in a more obvious change to the LED display.

Another interesting thing to note about this project is that [Hunter] is using the snow in his yard to diffuse the light from the LEDs. He’s actually buried the strip under a layer of snow. This has the result of hiding the electronics, but blurring the light enough so you can’t see the individual LEDs. The effect is rather nice, and it’s something different to add to your holiday lights display. Be sure to check out the video below for a demonstration.


Filed under: Arduino Hacks, Holiday Hacks

Video mixing chess games on tv in Norway using Ethernet Shield

Heidi Røneid with an Arduino Ethernet microprocessor. (Photo: Tore Zakariassen, NRK)

When The Norwegian Broadcasting (NRK) planned the television broadcast of the Chess Olympiad 2014 in Tromsø, Norway, they encountered a challenge: how to mix video, graphics and the results of many ongoing chess games simultaneously, requiring 16 cameras for the games going on at the same time?

On their blog you can find a long and nice post about how they found the solution using Arduino Uno, Arduino Ethernet Shield and the library for Arduino to control such Atem switchers written by Kasper Skårhøj:

At first, the idea was to use a computer with a webcam for each of the 16 games, then mix video images, background animation and results in software on each of them.

Afterwards the finished mix of images would be streamed to separate channels in our web player, so that the online audience would be able to choose which game they wanted to follow. This solution would also provide our outside broadcasting van (OB van) with 16 finished video sources composed of video, graphics and results. This would make the complex job of mixing all video signals much easier.

After thorough thinking we came to the conclusion that for our web-audience, it would be better to skip the stream of individual games, and spend our resources on building websites that could present all games in the championship via HTML in real time. This would also give the audience the opportunity to scroll back and forth in the moves and recall all the previous games in the championship. We started working on it immediately, and you can find the result on our website nrk.no/sjakk.

Arduino Blog 28 Aug 19:14
arduino  chess  ethernet  featured  games  norway  shield  tv  

Add long-distance connectivity to your Arduino with the CATkit System

Introduction

Have you ever wanted to connect your Arduino to sensors or other devices but over a long distance? And we don’t mean a few metres – instead, distances of up to 100 metres? Doing so is possible with the CATkit system from SMART greenhouse.

This system is a combination of small boards that are connected between your Arduino and external devices using CAT5 networking cable, giving a very simple method of connecting devices over distances you previously thought may not have been possible – or have used costly wireless modules in the past.

The maximum distances possible depend on the signal type, for example:

  • analogue signals up to 100 metres (with a 0.125 V drop)
  • 1-wire signals (ideal for DS18B20 temperature sensors) up to 75 metres
  • SPI bus up to 50 metres
  • I2C bus up to 35 metres
  • Serial data at 9600 bps varies between 50 and 100 metres

In principle you could also use this with other development boards that utilise the Arduino Uno shield form-factor and work with 5V – so not for the Arduino Due, etc. For more information check out the .pdf documentation at the bottom of this page.

How it works

For each system you need one CATkit Arduino shield:

… and one or more Kitten boards. These are both inline – in that they can “tap in” to a run:

or have one RJ45 socket for installation at the end of a cable run:

Note that the inline Kitten has male pins for the breakout, and the end unit has females. These units are available in kit form or assembled. You then use the network cables between the shield and each Kitten, for example:

Each Kitten can distribute six signals, and up to three can be connected to one CATkit shield. These three distribute analogue pins 0~5, digital pins 0~5 and 6~11 respectively. You can also introduce external power to the CATkit shield and the onboard regulator will offer 5V at up to 950 mA for the power bus which can be accessed from the inline or end Kitten boards. This saves having to provide separate 5V power to devices away from the Arduino, and very convenient for sensors or remote I2C-interface displays.  

Using the CATkit system

If you have the units in kit form, assembly is very simple. For example – the main CATkit shield:

The shield is in the latest Arduino R3 format, and all the required parts are included. The PCB is neatly solder-masked and silk-screened so soldering is easy. The power regulator is in D-PAK form, however with a little help it’s easy to solder it in:

Otherwise the shield assembly is straight forward, and in around ten minutes you have the finished product (somehow we lost the DC socket, however one is included):

The cut-out in the PCB gives a neat clearance for the USB socket.  The inline unit was also easily assembled, and again the kit includes all the necessary parts:

… and after a few minutes of soldering the board is ready:

A benefit of using the kit version is that you can directly solder any wires from sensors straight to the PCB for more permanent installations. 

Using the CATkit system

Any Arduino user with a basic understanding of I/O will be ready for the CATkit system. You can think of it as a seamless extension to the required I/O pins, taking into account the maximum distances possible as noted on the CATkit website or earlier in this review.

For a quick test we connected an I2C-interface LCD using an inline Kitten module via 5M of network cable, as shown in this video.

Conclusion

With a little planning and the CATkit system you can create neat plug-and-play sensor or actuator networks with reusable lengths of common networking cable. To do so is simple – and it works, so for more information and distributors please visit the product website.

And if you enjoyed this article, or want to introduce someone else to the interesting world of Arduino – check out my book (now in a third printing!) “Arduino Workshop”.

Have fun and keep checking into tronixstuff.com. Why not follow things on twitterGoogle+, subscribe  for email updates or RSS using the links on the right-hand column, or join our forum – dedicated to the projects and related items on this website. Sign up – it’s free, helpful to each other –  and we can all learn something.

[Note – CATkit system parts are a promotional consideration from SMART green house]

The post Add long-distance connectivity to your Arduino with the CATkit System appeared first on tronixstuff.

Tronixstuff 12 Apr 23:33

Online data analysis with Arduino and plotly

Introduction

It’s 2014 and the Internet-of-Things is flying along at a rapid rate with all sorts of services and devices that share data and allow control via the Internet. In the spirit of this we look a new service called plotly.

This is a “collaborative data analysis and graphing tool” which allows you to upload your own data to be analysed in many ways, and then graph the results using all sorts of plot types.

With plotly you can run your own mathematical functions over your data, run intense statistical analysis and use or edit one of the many APIs (PythonMATLABRJuliaRESTArduino, or Perl) to increase the level of customisation. Plotly works in conjunction with Google Drive to store your data, however this can be exported and imported without any issues. Futhermore plotly works best in Google Chrome.

For our review we’ll look at using plotly to quickly display and analyse data received from an Internet-connected Arduino – our EtherTen, or you can use almost any Arduino and Ethernet shield. The system isn’t completely documented however by revieiwng our example sketch and some experimenting with the interface plotly is very much usable, even in its current beta format.

Getting started with plotly

You will need to setup a plotly account, and this is simply accomplished from their main site. Some of you may be wondering what plotly costs – at the time of writing plotly is free for unlimited public use (that is – anyone can see your data with the right URL), but requires a subscription for extended private use. You can find the costs at the plans page.

Once you have a plotly account, visit your plotly home page, whose URL is https://plot.ly/~yourusername/# – then click “edit profile”. Another window will appear which amongst other things contains your plotly API key – make a note of this as you will need it and your username for the Arduino sketch.

Next, you’ll need some Arduino or compatible hardware to capture the data to log and analyse. An Arduino with an Ethernet or WiFi connection, and appropriate sensors for your application. We have our EtherTen that takes readings from a temperature/humidity sensor and a light level sensor:

Now you need a new Arduino library, which is available from the plotly API page. Lots of APIs there… Anyhow, click “Arduino” and you will arrive at the github page. Download the entire .zip file, and extract the plotly_ethernet folder into Arduino libraries folder which in most installations can be found at ..\Arduino-1.0.x\libraries. 

Finally we’ll use a demonstration sketch provided by plotly and modify this to our needs, which can be downloaded from github. We’ll go through this sketch and show you what to update – so have a quick look and then at out example sketch at the end of this section.

First, insert any code required to get data from your sensors and store the data in a variable – do this so the values can be used in void loop. Next, update the MAC address and the IP address of your Ethernet-enabled Arduino with the following lines:

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte my_ip[] = { 192,168,0,77 };

and change the MAC and IP if necessary. If Arduino and Ethernet is new to you, check out the tutorial. Now look for the following two lines and enter your plotly username and API key:

plotly.username = "yourplotlyusername";
plotly.api_key = "yourplotlyAPIkey";

Next – it’s a good idea to set your time zone, so the time in plots makes sense. Add the following two lines in void setup():

plotly.timestamp = true; 
plotly.timezone = "Australia/Melbourne";

You can find a list of time zones available for use with plotly here. Now you need to determine how many traces and points to use. A trace is one source of data, for example temperature. For now you will have one point, so set these parameters using the following lines:

int nTraces=x; // x = number of traces
int nPoints=1;

For example, we will plot temperature, humidity and light level – so this requires three traces. The next step is to set the filename for the plot, using the following line:

char filename[] = "simple_example";

This will be sent to plotly and your data will be saved under that name. At the point in your sketch where you want to send some data back to plotly, use:

plotly.open_stream(nPoints, nTraces, filename, layout);

… then the following for each trace:

plotly.post(millis(),data);

where data is the variable to send back to plotly. We use millis() as our example is logging data against time.

To put all that together, consider our example sketch with the hardware mentioned earlier:

// Code modified from example provied by plot.ly

#include <SPI.h>
#include <Ethernet.h>
#include "plotly_ethernet.h"
#include "DHT.h"

// DHT Sensor Setup
#define DHTPIN 2               // We have connected the DHT to Digital Pin 2
#define DHTTYPE DHT22          // This is the type of DHT Sensor (Change it to DHT11 if you're using that model)
DHT dht(DHTPIN, DHTTYPE);      // Initialize DHT object
plotly plotly;                 // initialize a plotly object, named plotly

//initialize plotly global variables
char layout[]="{}";
char filename[] = "Office Weather and Light"; // name of the plot that will be saved in your plotly account -- resaving to the same filename will simply extend the existing traces with new data

float h, t, ll;
int lightLevel;

// Ethernet Setup
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; // doesn't really matter
byte my_ip[] = { 192, 168, 1, 77 }; // google will tell you: "public ip address"

void startEthernet(){
  Serial.println("Initializing ethernet");
  if(Ethernet.begin(mac) == 0){
    Serial.println("Failed to configure Ethernet using DHCP");
    // no point in carrying on, so do nothing forevermore:
    // try to congifure using IP address instead of DHCP:
    Ethernet.begin(mac, my_ip);
  }
  Serial.println("Done initializing ethernet");
  delay(1000);
}

void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }

  dht.begin(); // initialize dht sensor reading
  startEthernet();    // initialize ethernet

    // Initialize plotly settings
  plotly.VERBOSE = true; // turn to false to suppress printing over serial
  plotly.DRY_RUN = false; // turn to false when you want to connect to plotly's servers 
  plotly.username = "yourplotlyusername"; // your plotly username -- sign up at https://plot.ly/ssu or feel free to use this public account. password of the account is "password"
  plotly.api_key = "yourplotlyapikey"; // "public_arduino"'s api_key -- char api_key[10]
  plotly.timestamp = true; // tell plotly that you're stamping your data with a millisecond counter and that you want plotly to convert it into a date-formatted graph
  plotly.timezone = "Australia/Melbourne"; // full list of timezones is here:https://github.com/plotly/arduino-api/blob/master/Accepted%20Timezone%20Strings.txt
}

void loop() 
{
  // gather data to plot
  h = dht.readHumidity(); // read humitidy from DHT pin
  t = dht.readTemperature();
  lightLevel = analogRead(A5);
  ll = lightLevel / 100; // reduce the value from the light sensor

  // Open the Stream
  plotly.open_stream(1, 3, filename, layout); // plotlystream(number_of_points, number_of_traces, filename, layout)

  plotly.post(millis(),t); // post temperature to plotly (trace 1)
  delay(150);
  plotly.post(millis(),h); // post humidity to plotly (trace 2)
  delay(150);
  plotly.post(millis(),lightLevel); // post light sensor readout to plotly (trace 3)

  for(int i=0; i<300; i++)
  { // (once every five minutes)
    delay(1000);
  }
}

After wiring up the hardware and uploading the sketch, the data will be sent until the power is removed from the Arduino.

Monitoring sensor data

Now that your hardware is sending the data off to plotly, you can check it out in real time. Log into plotly and visit the data home page – https://plot.ly/plot – for example:

Your data file will be listed – so just click on the file name to be presented with a very basic graph. Over time you will see it develop as the data is received, however you may want to alter the display, headings, labels and so on. Generally you can click on trace labels, titles and so on to change them, the interface is pretty intuitive after a few moments. A quick screencast of this is shown in this video.

To view and analyse the raw data – and create all sorts of custom plots, graphs and other analysis – click the “view data in grid” icon which is the second from the left along the bar:

At which point your data will be displayed in a new tab:

From this point you can experiment to your heart’s content – just don’t forget to save your work. In a short amount of time your data can be presented visually and analysed with ease:

Conclusion

Although plotly is still in beta form, it works well and the developers are responsive to any questions – so there isn’t much more to say but give it a try yourself, doing so won’t cost you anything and you can see how useful plotly is for yourself. And if you enjoyed this article, or want to introduce someone else to the interesting world of Arduino – check out my book (now in a third printing!) “Arduino Workshop”.

Have fun and keep checking into tronixstuff.com. Why not follow things on twitterGoogle+, subscribe  for email updates or RSS using the links on the right-hand column, or join our forum – dedicated to the projects and related items on this website. Sign up – it’s free, helpful to each other –  and we can all learn something.

The post Online data analysis with Arduino and plotly appeared first on tronixstuff.

Tronixstuff 21 Jan 05:29
analysis  api  arduino  data  ethernet  internet  iot  of  online  plotly  things  tronixstuff  tutorial