node-enocean basic enocean telegram handler used with USB300

node-enocean.js

// node-enocean v0.0
CRC8Table = [
  0x00, 0x07, 0x0e, 0x09, 0x1c, 0x1b, 0x12, 0x15, 
  0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d, 
  0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65, 
  0x48, 0x4f, 0x46, 0x41, 0x54, 0x53, 0x5a, 0x5d, 
  0xe0, 0xe7, 0xee, 0xe9, 0xfc, 0xfb, 0xf2, 0xf5, 
  0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3, 0xca, 0xcd, 
  0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85, 
  0xa8, 0xaf, 0xa6, 0xa1, 0xb4, 0xb3, 0xba, 0xbd, 
  0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2, 
  0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4, 0xed, 0xea, 
  0xb7, 0xb0, 0xb9, 0xbe, 0xab, 0xac, 0xa5, 0xa2, 
  0x8f, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9d, 0x9a, 
  0x27, 0x20, 0x29, 0x2e, 0x3b, 0x3c, 0x35, 0x32, 
  0x1f, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0d, 0x0a, 
  0x57, 0x50, 0x59, 0x5e, 0x4b, 0x4c, 0x45, 0x42, 
  0x6f, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7d, 0x7a, 
  0x89, 0x8e, 0x87, 0x80, 0x95, 0x92, 0x9b, 0x9c, 
  0xb1, 0xb6, 0xbf, 0xb8, 0xad, 0xaa, 0xa3, 0xa4, 
  0xf9, 0xfe, 0xf7, 0xf0, 0xe5, 0xe2, 0xeb, 0xec, 
  0xc1, 0xc6, 0xcf, 0xc8, 0xdd, 0xda, 0xd3, 0xd4, 
  0x69, 0x6e, 0x67, 0x60, 0x75, 0x72, 0x7b, 0x7c, 
  0x51, 0x56, 0x5f, 0x58, 0x4d, 0x4a, 0x43, 0x44, 
  0x19, 0x1e, 0x17, 0x10, 0x05, 0x02, 0x0b, 0x0c, 
  0x21, 0x26, 0x2f, 0x28, 0x3d, 0x3a, 0x33, 0x34, 
  0x4e, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5c, 0x5b, 
  0x76, 0x71, 0x78, 0x7f, 0x6A, 0x6d, 0x64, 0x63, 
  0x3e, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2c, 0x2b, 
  0x06, 0x01, 0x08, 0x0f, 0x1a, 0x1d, 0x14, 0x13, 
  0xae, 0xa9, 0xa0, 0xa7, 0xb2, 0xb5, 0xbc, 0xbb, 
  0x96, 0x91, 0x98, 0x9f, 0x8a, 0x8D, 0x84, 0x83, 
  0xde, 0xd9, 0xd0, 0xd7, 0xc2, 0xc5, 0xcc, 0xcb, 
  0xe6, 0xe1, 0xe8, 0xef, 0xfa, 0xfd, 0xf4, 0xf3
];

// EnOcean Serial Port Setup and API functions.
serialport = require("/home/pi/node_modules/serialport").SerialPort;
var portName = '/dev/ttyUSB0'; //This is the standard Raspberry Pi Serial port or /dev/ttyAMA0
var readData = ''; 			//Array to hold the values read in from the port
var serialPortOpen = false, enoPacket0 = null, enoPacket1 = null, enoPacket2 = null, enoPacketCount = 0, enoBaseID = "0x80";
var serialPort = new serialport(portName, {
	baudRate: 56700,
	dataBits: 8,
	parity: 'none',
	startBits: 1,
	stopBits: 1,
	flowControl: false,
});
serialPort.on("open", function () {
	serialPortOpen = true;
	console.log('EnOcean: USB0 port open');
	serialPort.on('data', function(data) {
		console.log('on data: ' + data.toString('hex')+' len:'+data.length);
		if( toHex(data[0]) == "55" &&  (data.length >=12 &&  toHex(data[6]) =="f6") || (data.length >=15 &&  toHex(data[6]) =="a5")){
			//console.log('isEnO syn:'+toHex(data[0])+' org:'+toHex(data[6])+' swState:'+toHex(data[7]));
			console.log('eno syn:'+toHex(data[0])+' lng:'+data.length+ ' org:'+toHex(data[6]));	
			packet =  data.toString('hex');
			if(toHex(data[6]) == "f6"){
				ENOreciveSW(toHex(data[7]),packet);
			}				
			if(toHex(data[6]) == "a5"){
				ENOrecive4BS(packet);
			}
		} else {   // Fragmented telegram
			if(enoPacketCount >= 2){ 
				enoPacket2 = enoPacket1+data.toString('hex');
				//console.log("no:"+enoPacketCount+' pkt:'+enoPacket2+' b6:'+enoPacket2.substring(14,16)+' @:'+new Date().toUTCString());			
				if(enoPacket2.length >=25){ // Switch telegram
					var rorg = enoPacket2.substring(12,14);
					//console.log("pk2 rorg:"+enoPacket2.substring(12,14)+" rorg:"+rorg+" state:"+enoPacket2.substring(14,16));
					if(rorg == "f6"){
						ENOreciveSW(enoPacket2.substring(14,16),enoPacket2);
					}
				}
				if(enoPacket2.length >=30){	// 4BS telegram
					var rorg = enoPacket2.substring(12,14);
					//console.log("pk2 rorg:"+enoPacket2.substring(12,14)+" rorg:"+rorg+" state:"+enoPacket2.substring(14,16));
					if(rorg == "a5"){
						ENOrecive4BS(enoPacket2);
					}
				}			
				packetReset();
			}
			if(enoPacketCount == 1){ 
				enoPacketCount++;
				enoPacket1 = enoPacket0+data.toString('hex');
				//console.log("no:"+enoPacketCount+' pkt:'+enoPacket1+' len:'+  enoPacket1.length);   // b6:'+enoPacket1.substring(14,16)+' @:'+new Date().toUTCString());
				if(enoPacket1.length >=25){  // Switch telegram
					var rorg = enoPacket1.substring(12,14);
					//console.log("pk1 rorg:"+enoPacket1.substring(12,14)+" rorg:"+rorg+" state:"+enoPacket1.substring(14,16));
					if(rorg == "f6"){
						ENOreciveSW(enoPacket1.substring(14,16),enoPacket1);
						packetReset();
						return;
					}
				}
				if(enoPacket1.length >=30){  // 4BS telegram
					var rorg = enoPacket1.substring(12,14);
					//console.log("pk1 rorg:"+enoPacket1.substring(12,14)+" rorg:"+rorg+" state:"+enoPacket1.substring(14,16));
					if(rorg == "a5"){
						ENOrecive4BS(enoPacket1);
						packetReset();
					}
				}
			}
			if (toHex(data[0]) == "55"){  // Sync byte
				enoPacket0 = data.toString('hex');
				//console.log("no:"+enoPacketCount+' pkt:'+enoPacket0+' @:'+new Date().toUTCString());
				enoPacketCount++;			
			}	
		}
	});
});
// EnOcean telegram crc & functions
var EnOcean = require('./EnOceanRadio');
function proccrc8(CRC, u8Data){ 
	return EnOcean.CRC8Table[(CRC ^ u8Data) & 0xff];
}
function ESP3HeaderCRC(telegramHeader){
	u8CRC = 0;
	u8CRC = proccrc8(u8CRC,telegramHeader[1]);
	u8CRC = proccrc8(u8CRC,telegramHeader[2]);
	u8CRC = proccrc8(u8CRC,telegramHeader[3]);
	u8CRC = proccrc8(u8CRC,telegramHeader[4]);
	return u8CRC;
}
function ESP3DataCRC(telegramData){
	u8CRC = 0;
	for (var dbyte in telegramData){
		u8CRC = proccrc8(u8CRC,telegramData[dbyte])
	}
	return u8CRC;
}
function ESP3Header(packetType,packetData){
	pHeader = [0x55]; 					//sync
	pHeader.push(0x00); 				//MSB Data Length
	pHeader.push(packetData.length);	//LSB Data Length
	pHeader.push(0x00); 				//optional data length
	pHeader.push(packetType); 			//packet type
	pHeader.push(ESP3HeaderCRC(pHeader));//Header CRC
	return pHeader;
}
// WARNNING 
// This function only sends Switch (RPS) telegram
// It needs to included the sending of 1 & 4 byte telegrams
function sendESP3Packet(packetType, packetData){

	pESP3Packet = ESP3Header(packetType,packetData);
	for(pi=0; pi<7; pi++){
		pESP3Packet.push(packetData[pi]); 
	}	
	pESP3Packet.push(ESP3DataCRC(packetData)); 
	//return pESP3Packet;

	//var stel = new Buffer ([0x55,0x00,0x07,0x00,0x01,0x11,0xF6,0x30,0xFF,0x8D,0x67,0x80,0x30,0xD7]);  
	//var pk = ['syn','dlo','dl1','opl','pt','crc','org','sw','id0','id1','id2','id3','status','crc'];
	var stel = new Buffer(14);
		
	for(bi=0; bi<14; bi++){
		var hexno = pESP3Packet[bi].toString(16);
		stel[bi]= pESP3Packet[bi];
		//console.log("stel["+bi+"]"+stel[bi]+" hex:"+hexno+" dec:"+pESP3Packet[bi]+" pk:"+pk[bi]);				
	}
						
	serialPort.write(stel, function(err, results) {
		//console.log('err ' + err);
		//console.log('transmitResult:' + results.toString(16));
	});
}
function toHex(s){
 return _s = s.toString(16);
}
function packetReset(){
	enoPacketCount=0;
	enoPacket0=null;
	enoPacket1=null;
	enoPacket2=null;
}
// EnOcean receive/send
// _dp is channel no 1 to 128 when using base id
function ENOsendSW(_dp,_state){
	var x =parseInt(enoBaseID, 16);
	var y=parseInt(_dp, 16);
	var z=x+y;
	var dPID = "0x"+z.toString(16);
	if(_state==true || _state=="true"){  
		sendESP3Packet(0x01, [0xF6,0x10,0xFF,0xFF,0x46,""+dPID+"",0x30]); // on
		sendESP3Packet(0x01, [0xF6,0x00,0xFF,0xFF,0x46,""+dPID+"",0x20]); // release
	} else {
		sendESP3Packet(0x01, [0xF6,0x30,0xFF,0xFF,0x46,""+dPID+"",0x30]); // off
		sendESP3Packet(0x01, [0xF6,0x00,0xFF,0xFF,0x46,""+dPID+"",0x20]); // release
	}
}
function ENOreciveSW(swState,packet){
	var state= null;
	if( swState == "ff"){return;}
	
	if(swState == "00" || swState == "0"){
		state =false;
	}
	if(swState == "10" || swState == "50" || swState == "30" || swState == "70"){
		var state = null;
		var _rocker=null;
		if(swState == "10" || swState == "50"){state =true;}
		if(swState == "30" || swState == "70"){state =false;}
		if(swState == "10" || swState == "30"){_rocker="b";}
		if(swState == "50" || swState == "70"){_rocker="a";}			
		var dPID = packet.substring(16,24);  // EnOCean id 
		// var dPID = packet.substring(16,24)+"_"+_rocker; // EnOcean id + Rocker id	
		console.log("SWT id:"+dPID+" rocker:"+_rcoker+" state:"+swState);
	}
}
function ENOrecive4BS(packet){
	var data=packet.substring(14,22); 
	var DB3=packet.substring(14,16);
	var DB2=packet.substring(16,18);
	var DB1=packet.substring(18,20);
	var DB0=packet.substring(20,22);
	var dPID= packet.substring(22,30);
	console.log("4BS id:"+dPID+" DB0:"+DB0+" DB1:"+DB1+" DB2:"+DB2+" DB3:"+DB3);
}