#Firmata

Dart Implementation of Firmata

Inspired by:

• js-firmata
• node-arduino-firmata

Currently working:

• Connexion to Arduino
• Digital read/write
• Analog read/write
• Servo

TODO:

• I2C
• OneWire

Firmata can runs as Chrome App.

Install

Firmata needs serial_port lib. To install it, easily, just run bin/install.sh

Samples

• Blink

import 'package:firmata/firmata.dart';
import 'dart:async';

final ledPin = 13;

main() async {
  print('blink start ...');
  final board = await detect();

  print("connected");
  print('Firmware: ${board.firmware.name}-${board.firmware.major}.${board.firmware.minor}');

  var ledOn = true;
  await board.pinMode(ledPin, PinModes.OUTPUT);

  new Timer.periodic(new Duration(milliseconds: 500), (_) {
    if (ledOn) {
      print("+");
      board.digitalWrite(ledPin, PinValue.HIGH);
    } else {
      print("-");
      board.digitalWrite(ledPin, PinValue.LOW);
    }
    ledOn = !ledOn;
  });
}

• Play with buttons and leds.

import 'package:firmata/firmata.dart';
import 'dart:async';

final P1 = 2;
final P2 = 3;
final L1 = 4;
final L2 = 5;
final L3 = 6;
final L4 = 7;

main() async {
  print('Diduino start ...');
  final board = await detect();

  print("connected");
  print('Firmware: ${board.firmware.name}-${board.firmware.major}.${board.firmware.minor}');

  await board.pinMode(L1, PinModes.OUTPUT);
  await board.pinMode(L2, PinModes.OUTPUT);
  await board.pinMode(L3, PinModes.OUTPUT);
  await board.pinMode(L4, PinModes.OUTPUT);
  await board.pinMode(P1, PinModes.INPUT);
  await board.pinMode(P2, PinModes.INPUT);

  board.onDigitalRead.listen((pinState){
    if(pinState.pin == P1){
      board.digitalWrite(L1, pinState.value);
      board.digitalWrite(L2, pinState.value);
    } else {
      board.digitalWrite(L3, pinState.value);
      board.digitalWrite(L4, pinState.value);
    }
  });

}

• Analog Write

import 'package:firmata/firmata.dart';
import 'dart:async';
import 'dart:math';

// sample from https://github.com/shokai/node-arduino-firmata/blob/master/samples/analog_write.js

final L2 = 5;

main() async {
  final board = await detect();

  print("connected");
  print('Firmware: ${board.firmware.name}-${board.firmware.major}.${board.firmware.minor}');

  await board.pinMode(L2, PinModes.OUTPUT);

  final alea = new Random();

  new Timer.periodic(new Duration(milliseconds: 500), (_) {
    final value = alea.nextInt(255);
    print("analog write pin : $value");
    board.analogWrite(L2, value);
  });

}

• Servomotor

import 'package:firmata/firmata.dart';
import 'dart:async';

void main() async {
  final board = await detect();

  final pin = 2;

  print("connected");
  print('Firmware: ${board.firmware.name}-${board.firmware.major}.${board.firmware.minor}');

  int angle = 0;

  new Timer.periodic(new Duration(milliseconds: 100), (_) {
    print(angle);
    board.servoWrite(pin, angle);
    angle++;
    angle%=180;
  });

}

• Chrome app

import 'dart:html';
import 'package:firmata/firmata_chrome.dart';


main() async {
  ButtonElement led1Button = querySelector("#led1");
  final led1Pin = 4;

  final board = await detect();
  print("Connected");

  bool led1On = false;
  await board.pinMode(led1Pin, PinModes.OUTPUT);

  led1Button.onClick.listen((_){
    led1On = !led1On;
    led1Button.text = led1On ? "ON" : "OFF";
    await board.digitalWrite(led1Pin, led1On ? PinValue.HIGH : PinValue.LOW);
  }).onError(print);

}