electric imp code to read a button, and send it to an output signal (to be processed in another node).

electric imp - read button (and send to output signal)

// readButton function called every 100ms
function changeState()
{
    local buttonState = hardware.pin1.read();
    buttonOutput.set(buttonState)
}
 
// set pin1 as a digital input with a pullup resistor and call changeState when the stateChanges
hardware.pin1.configure(DIGITAL_IN_PULLUP, changeState);

// Set Input/Output Ports
local buttonOutput = OutputPort();  // Create the port

// Register with the server (this time, we add buttonOutput to the array of output ports)
imp.configure("Read Button", [], [buttonOutput]);