bs.js

let app = require('express')();
let server = require('http').Server(app);
let io = require('socket.io')(server);
let isRoot = require('is-root');

const raspi = require('raspi');
const Serial = require('raspi-serial').Serial;

let serial, sock, succes, error;
let current, tmp, line = "";

const CMD = 	{ "set_sms" 	: "AT+CMGF=1",
								"sms" 			: "AT+CMGS=",
							  "pin" 			: "AT+CPIN=",
							  "at"  			: "AT",
							  "call"			: "ATD>0<",
							 	"hangup"		: "ATH"	};
const RES = 	{ "ok" 		: "OK",
 								"msg"  	: ">" };
const ERR =   { "error" : "ERROR" };

if(!isRoot()) {
	console.log(`	You have to run this program as root.\r\nRestart with: sudo node`);
	console.log('TODO: add serail to user group');
	process.exit(1);
}

let response = (res) => {
	if(res == "") 	return;
	//console.log(`>${res}<`);
	for (let at in RES) {
			if(res.indexOf(RES[at]) > -1) {
				console.log("<< OK >>");
				succes();
				return;
			}
	}
	for (let at in ERR) {
			if(res.indexOf(ERR[at]) > -1) {
				console.log("<< ERROR >>");
				error();
				return;
			}
	}
	line = "";
}

let sendAt = (command) => {
	console.log(command);
	if( ! command.startsWith("ctr") ) {
		console.log(`cmd: ${command}`)
		serial.write(command + "\r\n");
	} else {
		console.log("ctrl");
		serial.write(0x1a);
		//serial.write("\r");
	}

}

let getAt = (cmd, args) => {
	for(let i = 0; i < args.length; i++) {
			cmd = cmd.replace(`>${i}<`, args[i]);
	}
	return cmd;
}


let dataIn= (data) => {
	const out = data.toString('utf8');
	line += out;
	let arr = line.split("\r\n");
	if(arr.length > 1) {
	  console.log(`data: ${ arr[arr.length-1] }`);
		for(i= 0; i < arr.length; i++) {
			response(arr[i]);
		}
	  line = arr[arr.length-1];
	}
}

sendSms = (nr, bericht) => {
	console.log("sending sms");

	// sending a AT command
	let at = function(value) {
	  console.log(`=> ${value}`);
	  return new Promise((resolve, reject) => {
	      succes = resolve;
	      error = reject;
				sendAt(value);
	  });
	};

	// sending AT commands
	at(CMD.set_sms)
	  .then(() => at(CMD.sms + nr))
	  .then(() => at(bericht))
	  .then(() => serial.write('\x1A'))
	  .catch((err) => console.log(err));
}


raspi.init(() => {
	console.log("init");
  serial = new Serial({"baudRate" : 115200 });
  serial.open(() => {
    setTimeout(()=> {
				sendSms("0031621863936", "hallo");

    }, 3000);

    serial.on('data', (data) => {
			dataIn(data);
    });
  });
});

server.listen(8000);

app.get('/', function (req, res) {
  res.sendFile(__dirname + '/index.html');
});

io.on('connection', function (socket) {
  sock = socket;
  socket.emit('news', { hello: 'world' });
  socket.on('my other event', function (data) {
    console.log(data.my);
    const out = data.my.toString('utf8') ;
    serial.write(out + "\r");
  });
});

sms.js

const raspi = require('raspi');
const Serial = require('raspi-serial').Serial;
const term = require( 'terminal-kit' ).terminal ;
const express = require('express')
const app = express()
let serial;
let current = "";
let cmd = { "set_sms" : "AT+CMGF=1",
			"sms" :  "AT+CMGS=" };
 
let currentCb = () => {
	
};

raspi.init(() => {
  serial = new Serial({"boaudRate" : 115200 });
  serial.open(() => {
    setTimeout(()=> { 
    	serial.write( set_sms + '\r\n' ) 
    	console.log( '>>' );

    }, 1000);

    serial.on('data', (data) => {
    	console.log(data);
      	// process.stdout.write(data);
    });

  });
});

app.get('/at/:cmd', function (req, res) {
  if(serial) {
	  	res.send('>> ' + req.params.cmd)
	  	serial.write(req.params.cmd + "\r\n");
  }
})

app.get('/sms/:cmd', function (req, res) {
  if(serial) {

	  	res.send('>> ' + req.params.cmd) 
	  	serial.write( cmd.set_sms + "\r\n" ) 

  }
})

app.listen(3000, function () {
  console.log('Example app listening on port 3000!')
})