This example reads the value of an analog sensor hooked up to pin 2, and writes it to the server whenever the button is pressed.

electric imp - read sensor on press

// Register with the server
imp.configure("Press button to read", [], []);

// readButton function called every 100ms
function changeState()
{
    local pinState = hardware.pin1.read();
    if (pinState)
    {
        local sensorValue = hardware.pin2.read();
        server.show(sensorValue);
    }
}
 
// set pin1 as a digital input with a pullup resistor and call changeState when the stateChanges
hardware.pin1.configure(DIGITAL_IN_PULLUP, changeState);
hardware.pin2.configure(ANALOG_IN);

changeState();