NEWIN - Zbx

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/* This code finds the variable 'data' sent by Sigfox backend inside the payload posted by the device. ** If latitude and longitude are sent, we convert it to 'location' variable. */ // Function to convert a hexadecimal value to decimal. function hex2dec(num) { return parseInt((num), 16).toString(10) } // finding variable data sent by sigfox const data = payload.find(x => x.variable === 'data'); if (!data) { console.log('Data can not be found'); } else { // get complete hexadecimal from variable data const mpayload = data.value; const bytes = []; // separating the hex string for an array as 12 positions (bytes). This return some like it: ['a1', '00', '12'...] for (let i = 0; i < 24; i += 2) { bytes.push(`${mpayload[i]}${mpayload[i + 1]}`) } // Get pulse1. It calls the function "hex2dec" and passes the bytes 3, 2, 1, and 0. const pulse1 = Number(hex2dec(`${bytes[3]}${bytes[2]}${bytes[1]}${bytes[0]}`)); // Get pulse2. It calls the function "hex2dec" and passes the bytes 7, 6, 5, and 4. const pulse2 = Number(hex2dec(`${bytes[7]}${bytes[6]}${bytes[5]}${bytes[4]}`)); // Get temperature. It calls the function "hex2dec" and passes the bytes 9 and 8. const temp = Number(hex2dec(`${bytes[9]}${bytes[8]}`) / 100).toFixed(2); // Get humidity. It calls the function "hex2dec" and passes the byte 10. const humidity = Number(hex2dec(`${bytes[10]}`) / 2).toFixed(2); // Get hall. It calls the function "hex2dec" and passes the byte 11. const hall = Number(hex2dec(`${bytes[11]}`)); const time = data.time ? data.time : new Date().toISOString(); const serie = data.serie ? data.serie : new Date().getTime(); // Push Tago variables to payload (payload is an global array on payload parser and is sent to Tago) payload.push({ variable: 'pulse1', value: Number(pulse1), time, serie, }, { variable: 'pulse2', value: Number(pulse2), time, serie, }, { variable: 'temperature', value: Number(temp), time, serie, unit: '°C', }, { variable: 'humidity', value: Number(humidity), time, serie, unit: '%', }, { variable: 'hall_effect', value: Number(hall), time, serie, }) }