monteslu / mqtt-serial

a node-serialport implementation using an MQTT client for sending and receiving serial data.

mqtt-serial

A virtual node-serialport implementation that uses MQTT as the transport.

MQTTSerialPort

Use mqtt to send/receive data to a remote physical device:

var MQTTSerialPort = require('mqtt-serial').SerialPort;
var mqtt = require('mqtt');
var firmata = require('firmata');

// setup the mqtt client with port, host, and optional credentials
var client = mqtt.connect('mqtt://127.0.0.1:1883', {username: 'A USER', password: 'A PASSWORD'});

//create the mqtt serialport and specify the send and receive topics
var serialPort = new MQTTSerialPort({
  client: client,
  transmitTopic: 'REPLACE WITH YOUR TRANSMIT TOPIC',
  receiveTopic: 'REPLACE WITH YOUR RECEIVE TOPIC'
});

//use the virtual serial port to send a command to a firmata device
var board = new firmata.Board(serialPort, function (err, ok) {
  if (err){ throw err; }
  //light up a pin
  board.digitalWrite(13, 1);
});

bindPhysical

Bind a physical serial port to receive/send data from an mqtt server:

var SerialPort = require('serialport').SerialPort;
var bindPhysical = require('mqtt-serial').bindPhysical;
var skynet = require('mqtt');

// setup the mqtt client with port, host, and optional credentials
var client = mqtt.connect('mqtt://127.0.0.1:1883', {username: 'A USER', password: 'A PASSWORD'});

// setup a connection to a physical serial port
var serialPort = new SerialPort('/dev/tty.usbmodem1411',{
    baudrate: 57600,
    buffersize: 1
});

//connects the physical device to an mqtt server
bindPhysical({
  serialPort: serialPort,
  client: client,
  transmitTopic: 'REPLACE WITH YOUR TRANSMIT TOPIC',
  receiveTopic: 'REPLACE WITH YOUR RECEIVE TOPIC'
});

mqtt-serial's Issues

ReferenceError: mqtt is not defined

hey I just copy pasted the https://github.com/monteslu/mqtt-serial#bindphysical example and changed the mqtt server, username and password and serial port path. when I start the script, I get:

osmc@rapi3:~/node$ node -i mqtt_beamer.js 
/home/osmc/node/mqtt_beamer.js:6
var client = mqtt.connect('mqtt://deisi:1883', {username: 'user', password: 'pw'});
                  ^

ReferenceError: mqtt is not defined
    at Object.<anonymous> (/home/osmc/node/mqtt_beamer.js:6:19)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.runMain (module.js:604:10)
    at run (bootstrap_node.js:389:7)
    at startup (bootstrap_node.js:149:9)
    at bootstrap_node.js:504:3

Im suuper new to node and javascript so I guess its easy issue.

figure out why binary data changes when sent over the wire

Serial to mqtt

hi great share!!

i want to bind my 2 weather stations please with mqtt so, i can use them with other tools easially.

i have 2 weather stations
both have a unique ID Example:

ID: weather1 Wind_Dir:NE Wind_Speed:0.0mph, Rain:0.00in., Temp:75.07F, Humidity:49.15%, Baro_Temp:74.75F, Pressure:1014.26hPa, Soil_Temp:0.00F, Soil_Mositure:1037

ID: weather2 Wind_Dir:NE Wind_Speed:3.0mph, Rain:0.00in., Temp:70.07F, Humidity:55.2%, Baro_Temp:70F, Pressure:1011.26hPa, Soil_Temp:0.00F, Soil_Mositure:1037

is it possible to publish each please ?
any tips how ?

thanks.