DRAGINO - Lbt1

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/* * LBT1 * mode 1,2 and 3 - payload type */ function Decoder(bytes) { // Decode an uplink message from a buffer // (array) of bytes to an object of fields. let value = bytes[0] << 8 | bytes[1]; const batV = value/1000;// Battery,units:V const mode = bytes[5]; // var value=(bytes[3]-0x30)*1000 +(bytes[5]-0x30)*100 + (bytes[5]-0x30)*10 +(bytes[6]-0x30); // var value = bytes.slice(3); let i; let con; let str = ""; let major = 1; let minor = 1; let rssi = 0; let addr = ""; if(mode === 2 ) { for(i = 38 ; i<50 ; i+=1) { con = bytes[i].toString(); str += String.fromCharCode(con); } addr = str; str = ""; for(i = 6 ; i<38 ; i+=1) { con = bytes[i].toString(); str += String.fromCharCode(con); } value = str; } if(mode === 3 ) { str = ""; for(i = 18 ; i < 22 ; i+=1) { con = bytes[i].toString(); str += String.fromCharCode(con); } major = parseInt(str, 16); str = ""; for(i = 22 ; i < 26 ; i+=1) { con = bytes[i].toString(); str += String.fromCharCode(con); } minor = parseInt(str, 16); str = ""; for(i = 28 ; i < 32 ; i+=1) { con = bytes[i].toString(); str += String.fromCharCode(con); } rssi = parseInt(str,16); str = ""; for(i = 6 ; i < 18 ; i+=1) { con = bytes[i].toString(); str += String.fromCharCode(con); } value = str; } if(mode === 1) { for(i = 6 ; i<11 ; i+=1) { con = bytes[i].toString(); str += String.fromCharCode(con); } value = str; } const uuid = value; const alarm = bytes[2] >> 4 & 0x0F; const step_count = (bytes[2] & 0x0F) << 16 | bytes[3] << 8 | bytes[4]; return [ {variable:"uuid",value:uuid}, {variable:"addr",value:addr}, {variable:"major",value:major}, {variable:"minor",value:minor}, {variable:"rssi",value:rssi}, {variable:"step",value:step_count}, {variable:"alarm",value:alarm}, {variable:"batv",value:batV,unit:"v"} ]; } const payload_raw = payload.find((x) => x.variable === "payload_raw" || x.variable === "payload" || x.variable === "data"); if (payload_raw) { try { // Convert the data from Hex to Javascript Buffer. const buffer = Buffer.from(payload_raw.value, "hex"); const serie = new Date().getTime(); const payload_aux = Decoder(buffer); payload = payload.concat(payload_aux.map((x) => ({ ...x, serie }))); } catch (e) { // Print the error to the Live Inspector. console.error(e); // Return the variable parse_error for debugging. payload = [{ variable: "parse_error", value: e.message }]; } }