Control an LED over the Internet via Arduino with Teleduino

Parts needed:

• An LED (we decided to use a 10mm white LED because they look neat)
• A 1K Resistor (or similar)
• Some hookup wire (we chose to use some single strand ethernet cable because it’s cheap, and connects well to the Arduino pin sockets)
• Some heatshrink (optional, but makes it look nice and tidy)

Steps:

• Take the LED and shorten the lead on the flat-edge side (the shortest lead).
• Shorten one of the leads on the resistor.
• Solder the short lead of the resistor to the short lead of the LED.
• Shorten the other lead on the resistor so that it’s the same length as the remainder lead on the LED.
• Solder the hookup wire to the two leads, and apply heatshrink. Take note of which lead is soldered to the resistor (we chose the white wire for this).
• Strip the other end of the hookup wires and connect to the Arduino. The white wire (the wire connected to the resistor) connects to a GND pin, and the other (our green wire) connects to a digital pin (we chose pin 3 because it also supports PWM).

Here are some example API calls that you can use to control your LED. You need to replace {key} with the unique API key you obtained when you completed the instructable Arduino Control via a Web Service with Teleduino. Just chuck the URLs into your browser’s address bar and you should see some magic happen on that LED.

Define the pin mode of digital pin 3 (Must be done once per boot prior to setting digital outputs. ‘pin=3’ mean pin 3, ‘mode=1’ means OUTPUT):
http://us01.proxy.teleduino.org/api/1.0/328.php?k={key}&r=definePinMode&pin=3&mode=1

Set the output of digital pin 3 to HIGH (‘pin=3’ means pin 3, ‘output=1’ means HIGH):
http://us01.proxy.teleduino.org/api/1.0/328.php?k={key}&r=setDigitalOutput&pin=3&output=1

Set the output of digital pin 3 to LOW (‘pin=3’ means pin 3, ‘output=0’ means LOW):
http://us01.proxy.teleduino.org/api/1.0/328.php?k={key}&r=setDigitalOutput&pin=3&output=0

Toggle the output of digital pin 3 (‘pin=3’ means pin 3, ‘output=2’ means toggle):
http://us01.proxy.teleduino.org/api/1.0/328.php?k={key}&r=setDigitalOutput&pin=3&output=2

Set the PWM value of pin 3 to 32 (LED will glow dull. ‘pin=3’ means pin 3, ‘output=32’ means PWM value):
http://us01.proxy.teleduino.org/api/1.0/328.php?k={key}&r=setPwmOutput&pin=3&output=32

Set the PWM value of pin 3 to 255 (LED will glow bright. ‘pin=3’ means pin 3, ‘output=255’ means PWM value):
http://us01.proxy.teleduino.org/api/1.0/328.php?k={key}&r=setPwmOutput&pin=3&output=255