RCM - LRW10
Product Datasheet
Device Profile for Tesenso IoT Cloud
Decoder/Payload Converter for Tesenso IoT Cloud
https://github.com/Tesenso-GmbH/Device-Decoder/blob/main/GWF_LRW10.js
// V 1.0 G.G. 09-06-2023 , Initial Version, Please don't confuse this decoder with GWF M-Bus or other decoder
//..... Medium .....
// 0x03 -> Gas
// 0x06 -> Warm Water
// 0x07 -> Water
/*
For Testing
{
"ts": 1686317316027,
"rssi": -40,
"snr": 8.2,
"toa": 98,
"frequency": 867300000,
"dr": "SF7 BW125 4/5",
"data":"02e61e490902000734ffff162fa90000200028fb",
"port": 2,
"bat": 0
}
*/
if (msg.data) {
var decoded = decodeFromHex(msg.data.toString());
decoded.ts = msg.ts;
decoded.rssi = msg.rssi;
decoded.snr = msg.snr;
decoded.toa = msg.toa;
decoded.frequency = msg.frequency;
decoded.dr = msg.dr;
//decoded.bat = decodeBattery(msg.bat);
decoded.hex = msg.data;
return {
msg: decoded,
metadata: metadata,
msgType: msgType
};
} else {
return {
msg: msg,
metadata: metadata,
msgType: msgType
};
}
function decodeFromHex(data) {
// Decode uplink message
var decoded = {};
//Parse string as bytes
var bytes = parseHexString(data);
//scale to manage the different scales with none, one or more decimals on the meter.
//var bytes = input.bytes;
// Decode an uplink message from a buffer
// (array) of bytes to an object of fields.
// gwf protocol byte 0
switch(bytes[0]){
case 0x01:
decoded.protocol="standard";
break;
case 0x02:
decoded.protocol="noDueDate";
break;
default:
decoded.protocol="unkown";
break;
}
// manufacturer byte 1,2
decoded.manufacturer=getManufacturer(bytes[1],bytes[2]);
// meter id byte 3,4,5,6
decoded.meterId=0;
for(var i=3;i>=0;i--){
decoded.meterId = decoded.meterId*100+decode(bytes[i+3])
}
//medium byte 7
switch(bytes[7]){
case 0x03:
decoded.medium="Gas";
break;
case 0x06:
decoded.medium="Hot Water";
break;
case 0x07:
decoded.medium="Water";
break;
default:
decoded.medium="Unkown";
}
decoded.badEncoder= (((bytes[8]&(1<<4))>>4)&((bytes[8]&(1<<6)))>>6)!==0;
decoded.noEncoder= (((bytes[8]&(1<<4))>>4)&((bytes[8]&(1<<5)))>>5)!==0;
decoded.lowBattery= ((bytes[8]&(1<<2))>>2)==1;
//actuality duration bytes 10,11
decoded.actualityduration=bytes[10]*265+bytes[9]
// register value, bytes 12,13,14,15
var registerValue=0;
var j=15;
while(1){
registerValue+=bytes[j]
if(j==12) break;
registerValue*=256;
j--;
}
decoded.registerValue=registerValue;
//byte 16
decoded.reservedBit0=(bytes[16]&0x1)==1;
decoded.continousFlow=(bytes[16]&0x2)==1;
decoded.reservedBit2=(bytes[16]&0x4)==1;
decoded.brokenPipe=(bytes[16]&0x8)==1;
decoded.reservedBit4=(bytes[16]&0x10)==1;
//decoded.lowBattery=(bytes[16]&0x20)==1;
decoded.backFlow=(bytes[16]&0x40)==1;
decoded.reservedBit7=(bytes[16]&0x80)==1;
//byte 17
decoded.batteryLifeSemesters=(bytes[17]&0xF8)>>3;
decoded.linkError=(bytes[17]&0x04)!==0
//byte 18-19
decoded.crc = "0x"+(bytes[18]*256+bytes[19]).toString(16);
return decoded;
}
function decode(b){
return (b>>4)*10+(b&0xF);
}
function getManufacturer(lowByte,highByte){
var valHB=parseInt(highByte);
var valLB=parseInt(lowByte);
var res=valHB*256+valLB;
var firstLetterCC = res / 32 / 32 + 64;
var firstLetter = String.fromCharCode(firstLetterCC);
var secondLetterCC = (res / 32) % 32 + 64;
var secondLetter = String.fromCharCode(secondLetterCC);
var thirdLetterCC = res % 32 + 64;
var thirdLetter = String.fromCharCode(thirdLetterCC);
return firstLetter.concat(secondLetter, thirdLetter);
}
function parseHexString(hex) {
for (var bytes = [], c = 0; c < hex.length; c += 2) {
bytes.push(parseInt(hex.substr(c, 2), 16));
}
return bytes;
}
Uplink documentation
Downlink documentation
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