/
ruuvitag.js
216 lines (177 loc) · 8.01 KB
/
ruuvitag.js
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"use strict";
module.exports = function(RED) {
function RuuviTagNode(config) {
RED.nodes.createNode(this, config);
var node = this;
node.on('input', function(msg) {
var manufacturerDataString = "";
var mqttPayload = {};
var isMqtt = false;
// Check if message input is from noble.
if (!msg.advertisement || !msg.advertisement.manufacturerData) {
// Message is not from noble, see if it's from the Ruuvi Gateway via MQTT.
if (!msg.topic || !msg.payload) {
return null;
} else {
isMqtt = true;
let mqttManufacturerStringStart = 10;
mqttPayload = JSON.parse(msg.payload);
manufacturerDataString = mqttPayload.data.substring(mqttManufacturerStringStart);
}
} else {
manufacturerDataString = msg.advertisement.manufacturerData.toString('hex');
}
let manufacturerIdStart = 0;
let manufacturerIdEnd = 4;
// Ruuvi manufacturer ID is 0x0499 but is little endian for some reason
let ruuviTagId = "9904";
// Ignore any non-Ruuvi tags
if (manufacturerDataString.substring(manufacturerIdStart, manufacturerIdEnd) != ruuviTagId) {
return null;
}
let ruuviData = parseRuuviData(manufacturerDataString);
if (!ruuviData) {
return null;
}
if (isMqtt) {
ruuviData.mac = parseMacFromMqttTopic(msg.topic);
} else {
ruuviData.mac = parseMacAddress(msg.peripheralUuid);
}
msg.payload = JSON.stringify(ruuviData);
node.send(msg);
});
}
RED.nodes.registerType("ruuvitag", RuuviTagNode);
}
var parseMacFromMqttTopic = function(topic) {
let macFound = topic.match(/(?:[0-9a-fA-F]:?){12}/g);
if (!macFound) {
return "";
} else {
return macFound[0];
}
}
var parseMacAddress = function(peripheralUuid) {
// Places the colon every 2 characters, but not at the end
return peripheralUuid.replace(/.{2}(?!\b)/g, '$&:');
}
var parseRuuviData = function(manufacturerDataString) {
let formatStart = 4;
let formatEnd = 6;
let formatRawV1 = "03";
let formatRawV2 = "05";
let dataFormat = manufacturerDataString.substring(formatStart, formatEnd);
let dataObject = {};
switch (dataFormat) {
case formatRawV1:
dataObject = parseRawV1Ruuvi(manufacturerDataString)
break;
case formatRawV2:
dataObject = parseRawV2Ruuvi(manufacturerDataString)
break;
default:
//console.log("Unknown dataformat: " + dataFormat);
dataObject = null;
}
return dataObject;
}
//https://github.com/ruuvi/ruuvi-sensor-protocols
var parseRawV1Ruuvi = function(manufacturerDataString) {
let humidityStart = 6;
let humidityEnd = 8;
let temperatureStart = 8;
let temperatureEnd = 12;
let pressureStart = 12;
let pressureEnd = 16;
let accelerationXStart = 16;
let accelerationXEnd = 20;
let accelerationYStart = 20;
let accelerationYEnd = 24;
let accelerationZStart = 24;
let accelerationZEnd = 28;
let batteryStart = 28;
let batteryEnd = 32;
let robject = {};
let humidity = manufacturerDataString.substring(humidityStart, humidityEnd);
//console.log(humidity);
humidity = parseInt(humidity, 16);
humidity /= 2; //scale
robject.humidity = humidity;
let temperatureString = manufacturerDataString.substring(temperatureStart, temperatureEnd);
let temperature = parseInt(temperatureString.substring(0, 2), 16); //Full degrees
temperature += parseInt(temperatureString.substring(2, 4), 16) / 100; //Decimals
if (temperature > 128) { // Ruuvi format, sign bit + value
temperature = temperature - 128;
temperature = 0 - temperature;
}
robject.temperature = +temperature.toFixed(2); // Round to 2 decimals, format as a number
let pressure = parseInt(manufacturerDataString.substring(pressureStart, pressureEnd), 16); // uint16_t pascals
pressure += 50000; //Ruuvi format
robject.pressure = pressure;
let accelerationX = parseInt(manufacturerDataString.substring(accelerationXStart, accelerationXEnd), 16); // milli-g
if (accelerationX > 32767) { accelerationX -= 65536; } //two's complement
let accelerationY = parseInt(manufacturerDataString.substring(accelerationYStart, accelerationYEnd), 16); // milli-g
if (accelerationY > 32767) { accelerationY -= 65536; } //two's complement
let accelerationZ = parseInt(manufacturerDataString.substring(accelerationZStart, accelerationZEnd), 16); // milli-g
if (accelerationZ > 32767) { accelerationZ -= 65536; } //two's complement
robject.accelerationX = accelerationX;
robject.accelerationY = accelerationY;
robject.accelerationZ = accelerationZ;
let battery = parseInt(manufacturerDataString.substring(batteryStart, batteryEnd), 16); // milli-g
robject.battery = battery;
return robject;
}
var parseRawV2Ruuvi = function(manufacturerDataString) {
let temperatureStart = 6;
let temperatureEnd = 10;
let humidityStart = 10;
let humidityEnd = 14;
let pressureStart = 14;
let pressureEnd = 18;
let accelerationXStart = 18;
let accelerationXEnd = 22;
let accelerationYStart = 22;
let accelerationYEnd = 26;
let accelerationZStart = 26;
let accelerationZEnd = 30;
let powerInfoStart = 30;
let powerInfoEnd = 34;
let movementCounterStart = 34;
let movementCounterEnd = 36;
let sequenceCounterStart = 36;
let sequenceCounterEnd = 40;
let robject = {};
let temperatureString = manufacturerDataString.substring(temperatureStart, temperatureEnd);
let temperature = parseInt(temperatureString, 16);
if ((temperature & 0x8000) > 0) { temperature = temperature - 0x10000; } // two's complement
robject.temperature = +(temperature / 200).toFixed(2); // 0.005 degrees
let humidityString = manufacturerDataString.substring(humidityStart, humidityEnd);
let humidity = parseInt(humidityString, 16); // 0.0025%
robject.humidity = +(humidity / 400).toFixed(2);
let pressure = parseInt(manufacturerDataString.substring(pressureStart, pressureEnd), 16); // uint16_t pascals
pressure += 50000; //Ruuvi format
robject.pressure = pressure;
// acceleration values in milli-Gs
let accelerationX = parseInt(manufacturerDataString.substring(accelerationXStart, accelerationXEnd), 16); // milli-g
if ((accelerationX & 0x8000) > 0) { accelerationX -= 0x10000; } // two's complement
let accelerationY = parseInt(manufacturerDataString.substring(accelerationYStart, accelerationYEnd), 16); // milli-g
if ((accelerationY & 0x8000) > 0) { accelerationY -= 0x10000; } // two's complement
let accelerationZ = parseInt(manufacturerDataString.substring(accelerationZStart, accelerationZEnd), 16); // milli-g
if ((accelerationZ & 0x8000) > 0) { accelerationZ -= 0x10000; } // two's complement
robject.accelerationX = accelerationX;
robject.accelerationY = accelerationY;
robject.accelerationZ = accelerationZ;
let powerInfoString = manufacturerDataString.substring(powerInfoStart, powerInfoEnd);
let battery = (parseInt(powerInfoString, 16) >> 5) + 1600; // millivolts > 1600
let txpower = (parseInt(powerInfoString, 16) & 0x001F) - 40; // dB > -40
robject.battery = battery;
robject.txPower = txpower;
let movementCounterString = manufacturerDataString.substring(movementCounterStart, movementCounterEnd);
let movementCounter = parseInt(movementCounterString, 16);
robject.movementCounter = movementCounter;
let sequenceCounterString = manufacturerDataString.substring(sequenceCounterStart, sequenceCounterEnd);
let sequenceCounter = parseInt(sequenceCounterString, 16);
robject.sequenceCounter = sequenceCounter;
return robject;
}