app.listen(3000, function () {
console.log('Example app listening on port 3000!');
forEach(pinsOut, function (pin){
duino.pinMode( pin, pinMode.OUTPUT);
});
duino.pinMode( sensorA0, pinMode.INPUT );
});
var awsIot = require('aws-iot-device-sdk');
var myThingName = 'Raspi3_2';
var duino = require( 'iotduino'),
pinMode = duino.PinMode, pinState = duino.PinState,
pins = duino.Pins,
bluePin = pins.GPIO12,
greenPin = pins.GPIO11,
redPin = pins.GPIO10,
ldrPin = pins.A4;
// pin GPIO SET
duino.pinMode( ldrPin, pinMode.INPUT);
duino.pinMode( bluePin, pinMode.OUTPUT);
duino.pinMode( greenPin, pinMode.OUTPUT);
duino.pinMode( redPin, pinMode.OUTPUT);
//create thing shadows with keys and certs
var thingShadows = awsIot.thingShadow({
keyPath: '/home/ubuntu/certs/61ab4d0910-private.pem.key',
certPath: '/home/ubuntu/certs/61ab4d0910-certificate.pem.crt',
caPath: '/home/ubuntu/certs/VeriSign.pem',
clientId: myThingName,
region: 'us-west-2'
});
var duino = require( 'iotduino'),
pinMode = duino.PinMode, pinState = duino.PinState,
pins = duino.Pins, pin = 0;
// ADC pins to INPUT
for ( pin = pins.A0; pin <= pins.A5; pin++) {
duino.pinMode( pin, pinMode.INPUT);
}
// repeat every 500 milliseconds, 2 times per second
setInterval( function () {
var values = [];
for ( pin = pins.A0; pin <= pins.A5; pin++) {
values[pin] = duino.analogRead( pin);
}
// read the analogous value
console.log( values);
}, 500);
function readSensor( callback) {
var data = [], bitGroup = [], checksum = 0,
totalBitsNr = 40, bitNr = 0,
signalTime = 0, startTime = 0,
temperature = 0, humidity = 0;
// the data pin is set as OUTPUT
duino.pinMode( dataPin, pinMode.OUTPUT);
// send LOW signal for 1 millisecond
// this informs the sensor to give back data
duino.digitalWrite( dataPin, pinState.LOW);
duino.delay(1);
// allow the sensor to set the pin HIGH
duino.digitalWrite( dataPin, pinState.HIGH);
// the data pin is set as INPUT for data reading
duino.pinMode( dataPin, pinMode.INPUT);
// As a confirmation of receiving the command,
// the sensor sends a HIGH signal for 20-40 microseconds
// then a LOW signal for about 80 microseconds
// and then a HIGH signal for about 80 microseconds
startTime = duino.micros();
while ( duino.digitalRead( dataPin) == pinState.HIGH) {
if ( duino.micros() - startTime > 50) {
return readSensor( callback);
}
}
startTime = duino.micros();
while ( duino.digitalRead( dataPin) == pinState.LOW) {
if ( duino.micros() - startTime > 90) {
return readSensor( callback);
}
}
startTime = duino.micros();
while ( duino.digitalRead( dataPin) == pinState.HIGH) {
if ( duino.micros() - startTime > 90) {
return readSensor( callback);
}
}
// read the 40 bits of data sent by the sensor
for ( bitNr = 0; bitNr < totalBitsNr; bitNr++) {
// receive the about 50 microseconds LOW signal,
// used as separator before two consecutive data bits
// NOTE: allow +50 microseconds for timeout
startTime = duino.micros();
while ( duino.digitalRead( dataPin) == pinState.LOW) {
if ( duino.micros() - startTime > 100) {
return readSensor( callback);
}
}
// receive the data bit ( 20 to 70 microseconds)
// NOTE: allow +50 microseconds for timeout
startTime = duino.micros();
while ( duino.digitalRead( dataPin) == pinState.HIGH) {
if ( duino.micros() - startTime > 120) {
return readSensor( callback);
}
}
signalTime = duino.micros() - startTime;
// signal is between 20-40 microseconds, then it is a '0' bit
// signal is between 60-80 microseconds, then it is a '1' bit
// NOTE: consider 50 microseconds as the range limit between '0' and '1' bits
data[bitNr] = signalTime > 50 ? 1 : 0;
}
// compute the temperature and humidity values
for ( bitNr = 15; bitNr >= 0; bitNr--) {
humidity += data[bitNr] * Math.pow( 2, 15 - bitNr);
temperature += data[bitNr + 16] * Math.pow( 2, 15 - bitNr);
}
// verify if were transmission-receptions errors
// which means the checksum (last 8 transmission bits)
// should be equal with the last 8 bits of the sum of
// the first four transmitted bytes
bitGroup[0] = humidity >> 8;
bitGroup[1] = humidity & 0xFF;
bitGroup[2] = temperature >> 8;
bitGroup[3] = temperature & 0xFF;
// transform the checksum (last 8 bits of the transmission) to decimal
for ( bitNr = 39; bitNr >= 32; bitNr--) {
checksum += data[bitNr] * Math.pow( 2, 39 - bitNr);
}
// erroneous data, need to get the data again from the sensor!
if ( checksum !== ((bitGroup[0] + bitGroup[1] + bitGroup[2] + bitGroup[3]) & 0xFF)) {
return readSensor( callback);
}
// get the decimal values of the temperature and humidity
// NOTE: need to divide by 10 the 16 bits value to get the real decimal value
humidity /= 10.0;
temperature /= 10.0;
// data read correctly, now invoke the callback
if ( typeof callback === 'function') {
callback( temperature, humidity);
}
};
var duino = require( 'iotduino'),
pinMode = duino.PinMode, pinState = duino.PinState,
pins = duino.Pins, ledPin = pins.GPIO13;
// pin 13 (GPIO13) is set as OUTPUT
duino.pinMode( ledPin, pinMode.OUTPUT);
// repeat every 500 milliseconds, 2 times per second
setInterval( function () {
// alternate the pin state between HIGH and LOW
duino.digitalWrite( ledPin, !duino.digitalRead( ledPin));
}, 500);
forEach(pinsOut, function (pin){
duino.pinMode( pin, pinMode.OUTPUT);
});