Electric Imp project.

I am working on using the Electric Imp I got from Adafruit to make a WiFi enabled Emoticon avatar. Basically it will receive code from a website and display the icon for that code on a small 8×8 LED matrix accompanied by a notification sound. This will also provide feedback through a button on the avatar to acknowledge the emoticon, and a motion detector to tell when someone is near the avatar.

So far I have gotten the Imp to receive data from a webpage and turn LEDs on or off from three independent I/O pins. The LEDs are red, green, and blue so they make different colors depending on which ones are on.
Here is the code I am using to do this.

Squirrel code:

// Register with the server
// April with brightness-controlled LED

hardware.pin1.configure(PWM_OUT, 1.0/500.0, 1.0);
hardware.pin2.configure(PWM_OUT, 1.0/500.0, 1.0);
hardware.pin5.configure(PWM_OUT, 1.0/500.0, 1.0);

class TableIn extends InputPort
{
//name = "LED Brightness"
//type = "number"

function set(v) {
// since pin 9 is configured for PWM, we can set the duty cycle with pin.write()
// write a floating point number between 0.0 and 1.0, where 1.0 = 100% duty cycle
hardware.pin1.write(v.red);
hardware.pin2.write(v.green);
hardware.pin5.write(v.blue);
server.log("v.red: "+v.red+" v.green: "+v.green+" v.blue: "+v.blue);
}
}

// Variable to represent LED state
ledState <- 0;

// blink function called every 100ms
function blink()
{
// Change state
ledState = ledState?0:1;

// Reflect state to the pin
hardware.pin8.write(ledState);

// Schedule the next state change
imp.wakeup(0.1, blink);
}

// Configure pin 9 as an open drain output with internal pull up
hardware.pin8.configure(DIGITAL_OUT_OD_PULLUP);

server.log("Brightness Controller Started");
imp.configure("April Brightness Controller", [ TableIn() ], []);
//blink();
server.sleepfor(30);

HTML Form:

Note: You will need to replace the “https://api.electricimp.com/v1/…use.your.own.address…” with the URL from the HTTP IN node in the Imp Planner.

<html><head><script>
function sendForm(form)
{
// Construct the JSON string in form.value
// x is a string ('cos of the quotes)
// y is an integer ('cos of no quotes)
form.value.value = "{ "red": " + form.red.value + ", "green": " + form.green.value + ", "blue": " + form.blue.value + " }"
form.submit();
}
</script></head>
<body>

<table width="200" border="1">
<tr>
<td>Off</td>
<td><form action="https://api.electricimp.com/v1/...use.your.own.address..." method="post" target="stat">
<input type="hidden" name="value">
<input type="hidden" name="red" value=1>
<input type="hidden" name="green" value=1>
<input type="hidden" name="blue" value=1>
<input type="button" value="ON" onclick="sendForm(this.form);" />
</form></td>
</tr>
<tr>
<td>Red</td>
<td><form action="https://api.electricimp.com/v1/...use.your.own.address..." method="post" target="stat">
<input type="hidden" name="value">
<input type="hidden" name="red" value=0>
<input type="hidden" name="green" value=1>
<input type="hidden" name="blue" value=1>
<input type="button" value="ON" onclick="sendForm(this.form);" />
</form></td>
</tr>
<tr>
<td>Orange</td>
<td><form action="https://api.electricimp.com/v1/...use.your.own.address..." method="post" target="stat">
<input type="hidden" name="value">
<input type="hidden" name="red" value=0>
<input type="hidden" name="green" value=0>
<input type="hidden" name="blue" value=1>
<input type="button" value="ON" onclick="sendForm(this.form);" />
</form></td>
</tr>
</tr>
<tr>
<td>green</td>
<td><form action="https://api.electricimp.com/v1/...use.your.own.address..." method="post" target="stat">
<input type="hidden" name="value">
<input type="hidden" name="red" value=1>
<input type="hidden" name="green" value=0>
<input type="hidden" name="blue" value=1>
<input type="button" value="ON" onclick="sendForm(this.form);" />
</form></td>
</tr>
</tr>
<tr>
<td>light blue</td>
<td><form action="https://api.electricimp.com/v1/...use.your.own.address..." method="post" target="stat">
<input type="hidden" name="value">
<input type="hidden" name="red" value=1>
<input type="hidden" name="green" value=0>
<input type="hidden" name="blue" value=0>
<input type="button" value="ON" onclick="sendForm(this.form);" />
</form></td>
</tr>
<tr>
<td>blue</td>
<td><form action="https://api.electricimp.com/v1/...use.your.own.address..." method="post" target="stat">
<input type="hidden" name="value">
<input type="hidden" name="red" value=1>
<input type="hidden" name="green" value=1>
<input type="hidden" name="blue" value=0>
<input type="button" value="ON" onclick="sendForm(this.form);" />
</form></td>
</tr>
</tr>
<tr>
<td>perple</td>
<td><form action="https://api.electricimp.com/v1/...use.your.own.address..." method="post" target="stat">
<input type="hidden" name="value">
<input type="hidden" name="red" value=0>
<input type="hidden" name="green" value=1>
<input type="hidden" name="blue" value=0>
<input type="button" value="ON" onclick="sendForm(this.form);" />
</form></td>
</tr>
</table>
<iframe src="" name="stat">
</body>
</html>

This code is based on the example found here.

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