exports.id = 'particulatesensor'; exports.title = 'Particulate sensor'; exports.group = 'Worksys'; exports.color = '#5CB36D'; exports.version = '1.0.0'; exports.output = ["red", "white"]; exports.author = 'Rastislav Kovac'; exports.icon = 'atom'; exports.readme = `# PM sensor`; /* tento command zapne senzor zo stavu idle do stavu Meranie rsPort.write([0x7E, 0x00, 0x00, 0x02, 0x01, 0x03, 0xF9, 0x7E] tento command vypne senzor do stavu idle rsPort.write([0x7E, 0x00, 0x01, 0x00, 0xFE, 0x7E] tento command cita namerane data zo senzora rsPort.write([0x7E, 0x00, 0x03, 0x00, 0xFC, 0x7E] */ const conversionTable = { 1: "pm1_0", 2: "pm2_5", 3: "pm4_0", 4: "pm10" // 1: "Mass concentration PM1.0", // 2: "Mass concentration PM2.5", // 3: "Mass concentration PM4.0", // 4: "Mass concentration PM10", // 5: "Number concentration PM0.5", // 6: "Number concentration PM1.0", // 7: "Number concentration PM2.5", // 8: "Number concentration PM4.0", // 9: "Number concentration PM10", // 10: "Typical Particle size", } exports.install = function(instance) { const fs = require("fs"); const SerialPort = require('serialport'); const { exec } = require('child_process'); let rsPort = null; let startToGetData = null; const tbName = "mp93b2nvd7OoqgBeEyE7N18kjlAV1Y4ZNXwW0zLG"; function writeToFile(data) { try { if (fs.existsSync("err.txt")) { let stats = fs.statSync("err.txt") let fileSizeInBytes = stats.size; if(fileSizeInBytes > 20000000) { fs.unlinkSync("err.txt"); // file deleted } } } catch(err) { console.error(err) } fs.writeFile("err.txt", data, {flag: "a"},function (err,data) { if (err) { return console.log(err); } console.log(data); }); } function startRsPort() { rsPort = new SerialPort("/dev/ttyUSB0", { autoOpen: false }); rsPort.on('open', function() { exec("stty -F /dev/ttyUSB0 115200 min 1 time 5 ignbrk -brkint -icrnl -imaxbel -opost -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke", (error, stdout, stderr) => { //exec("stty -F /dev/ttyUSB0 115200 min 1 time 5 cs8 -cstopb ignbrk -brkint -icrnl -imaxbel -opost -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke", (error, stdout, stderr) => { instance.send(0,{"stdout":stdout,"stderr":stderr,"err":error}); instance.send(0, exports.title + " RS USB port is set"); }); setStateToMeasurement(); }) rsPort.on('error', function(err) { instance.send(0, err.message); let d = new Date(); writeToFile(`${d}, ${err}`); }) rsPort.on("close", () => { clearInterval(startToGetData); rsPort.close(); instance.send(0, exports.title + " RS USB port is closed now ---> reopenning in 30 seconds"); writeToFile(`${d}, RS USB port is closed now ---> reopenning in 30 seconds`); rsPort = null; setTimeout(startRsPort, 30000); }) /* RECEIVED BYTES Byte 1 – 0x7E – start Byte 2 – 0x00 – adresa Byte 3 – 0x03 – cmd Byte 4 – 0x00 – state podľa obr.2 Byte 5 – 0x28 – počet prijatých dátových bytov Na konci 0xD4 – CRC Na konci 0x7E – stop STATE STATUS 0 - 0x00 No error 1 - 0x01 Wrong data length for this command (too much or little data) 2 - 0x02 Unknown command 3 - 0x03 No access right for command 4 - 0x04 Illegal command parameter or parameter out of allowed range 40 - 0x28 Internal function argument out of range 67 - 0x43 Command not allowed in current state */ let rsPortReceivedData = []; let measuredValues; rsPort.on("data", function(data) { //console.log("rsPort data function called") data = JSON.stringify(data); try { data = JSON.parse(data); } catch(err) { console.log("[Particulate Sensor] - unable to convert data to JSON"); return; } // array of received bytes data = data.data; rsPortReceivedData = [...rsPortReceivedData, ...data]; //console.log("----rsportALLDATA", rsPortReceivedData); if (rsPortReceivedData[0] != 126) { rsPortReceivedData = []; return; } if (rsPortReceivedData[rsPortReceivedData.length - 1] != 126) return; if (rsPortReceivedData.length === 7) { if (rsPortReceivedData[2] === 0){ instance.send(0, "Particulate sensor is in Measurement-Mode now"); rsPortReceivedData = []; return; } } // convert special characters to single byte rsPortReceivedData = rsPortReceivedData.toString(); rsPortReceivedData = rsPortReceivedData.replace(/125,94/g, "126"); rsPortReceivedData = rsPortReceivedData.replace(/125,93/g, "125"); rsPortReceivedData = rsPortReceivedData.replace(/125,51/g, "19"); rsPortReceivedData = rsPortReceivedData.replace(/125,49/g, "17"); rsPortReceivedData = rsPortReceivedData.split(","); //we only take measured values from received data measuredValues = rsPortReceivedData.slice(5, rsPortReceivedData.length-2); //console.log(measuredValues); let l = measuredValues.length; //console.log("length----", l); let i, j, temparray, counter = 0, chunk = 4; for ( i = 0, j = l; i < j; i += chunk ) { counter++; temparray = measuredValues.slice(i, i + chunk); convertDatabytesToFloat(temparray, conversionTable[counter]); } counter = 0; rsPortReceivedData = []; }) rsPort.open(); } function convertDatabytesToFloat(array, type) { //console.log("----", array); if(array.length < 4 || type == undefined) return; let result = Buffer.from(array).readFloatBE(0); result = parseFloat(result.toFixed(4)); //console.log(result, typeof result) let dataToTb = { [tbName]: [ { "ts": Date.now(), "values": { [type]: result } } ] } instance.send(1, dataToTb); } // get data from PM sensor function getMeasurements() { rsPort.write([0x7E, 0x00, 0x03, 0x00, 0xFC, 0x7E], function(err) { if(err){ return console.log('[Particulate Sensor] - Error on write: ', err.message) } instance.send(0, "Getting data from PM sensor"); }) } // we set the state of sensor to start to measure function setStateToMeasurement() { rsPort.write([0x7E, 0x00, 0x00, 0x02, 0x01, 0x03, 0xF9, 0x7E], function(err) { if(err){ return console.log('[Particulate Sensor] - Error on write: ', err.message) } instance.send(0, "PM sensor state set to measure"); }) } instance.on("close", function() { clearInterval(startToGetData); rsPort.close(); }); setTimeout(startRsPort, 10000); startToGetData = setInterval(getMeasurements, 300000); };