remote-serial-port-client

Introduction

Serial port over ethernet using a HTTP server with WebSockets and REST API.

NOTE: This is an early version of the script - not yet ready for production environment. Please be patient.

Getting Started

Install the package

npm install remote-serial-port-client

Make sure the server is running

npm install -g remote-serial-port-server
remote-serial-port-server --port 5147

List serial ports

var RemoteSerialPort = require('remote-serial-port-client').RemoteSerialPort;
var serialport = new RemoteSerialPort({ url: "http://localhost:5147/" });
serialport.list(function(error, ports) {
  console.log(ports);
});

Use in Node.js

Initialize

var RemoteSerialPort = require('remote-serial-port-client').RemoteSerialPort;
var serialport = new RemoteSerialPort({ url: "http://localhost:5147/" });
...

Using a TCP socket

var RemoteSerialPort = require('remote-serial-port-client').RemoteSerialPort;
var tcp = new RemoteSerialPort({ mode: "tcp", host: "127.0.0.1", port: 5147 });
tcp.open(function(error, result) {
  console.log("Connected");
  setTimeout(function() {
    tcp.write("AT;\n");
  }, 3000);
});
tcp.on("read", function(result) {
  console.log("read", result.data.toString('ascii'));
});

Similar for UDP, just change the mode to udp.

Use in browser

Reference the library

<script src="dist/RemoteSerialPort.min.js"></script>

Initialize in JavaScript

var serialport = new RemoteSerialPort({ url: "http://localhost:5147/" });
...

Methods

new RemoteSerialPort(options)

Creates a new instance.

Propreties of options argument:

Argument name	Type	Description
verbose	boolean	A value indicating whether to print details to console
mode	string	Mode: http, tcp, udp; default: http
url	string	URL to the the HTTP of the serial port server, mode 'http' only
host	string	Host name or IP address of the serial port server, TCP and UDP only
port	number	Port number of the serial port server, TCP and UDP only

list(callback)

Lists available serial ports from the remote host.

Argument name	Type	Description
port	string	Serial port name, e.g. COM1 or ttyUSB0 (without /dev)
callback	function	function(error, ports)

status(port, callback)

Gets the specified serial port status.

Argument name	Type	Description
port	string	Serial port name, e.g. COM1 or ttyUSB0 (without /dev)
callback	function	function(error, status)

open(port, options, callback)

Opens the specified serial port.

Argument name	Type	Description
port	string	Serial port name, e.g. COM1 or ttyUSB0 (without /dev)
options	object	Serial port config
options.baudRate	numeric	Baud rate, e.g. 9600, 57600, 115200, etc.
options.dataBits	numeric	Data bits: 5, 6, 7 or 8
options.stopBits	numeric	Stop bits: 1 or 2
options.parity	string	Parity: none, even, mark, odd, space
callback	function	function(error, result)

close(port, callback)

Closes the specified serial port.

Argument name	Type	Description
port	string	Serial port name, e.g. COM1 or ttyUSB0 (without /dev)
callback	function	function(error, result)

write(port, data, callback)

Writes data to the serial port.

Argument name	Type	Description
port	string	Serial port name, e.g. COM1 or ttyUSB0 (without /dev)
data	mixed	Data to be sent to serial port, String of Buffer
callback	function	function(error, result)

read(port, callback)

Reads data from the serial port receive buffer.

Argument name	Type	Description
port	string	Serial port name, e.g. COM1 or ttyUSB0 (without /dev)
callback	function	function(error, data)

available(port, callback)

Gets a number of bytes waiting in the serial port receive buffer.

Argument name	Type	Description
port	string	Serial port name, e.g. COM1 or ttyUSB0 (without /dev)
callback	function	function(error, result)

Server-side

See remote-serial-port-server script.