LoRa-Temperatursensor

Auszug von Wikipedia: The Things Network

Das The Things Network (TTN) ist eine offene communitybasierte Initiative zur Errichtung eines energiesparenden Weitbereichs-Netzwerks für das Internet der Dinge.

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Auszug von Wikipedia: IoBroker

ioBroker ist eine freie, in JavaScript entwickelte Softwarelösung, die Komponenten zur Gebäudeautomatisierung von den verschiedensten Anbietern hersteller- und protokollneutral in einer Plattform miteinander verbindet. Es ist 2014 aus dem Projekt CCU.IO hervorgegangen.

Es werden zahlreiche sogenannte Adapter zur Verfügung gestellt, um verschiedenste Heimautomatisierungssysteme zu unterstützen.

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#define EU863

#include "LowPower.h"
#include <TinyLoRa.h>
#include <SPI.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>

#define bme_en 4
#define lora_en1 5
#define lora_en2 6
#define lora_en3 7

// Network Session Key (MSB)
uint8_t NwkSkey[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

// Application Session Key (MSB)
uint8_t AppSkey[16] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

// Device Address (MSB)
uint8_t DevAddr[4] = { 0x00, 0x00, 0x00, 0x00 };

unsigned char loraData[4*3+2+1];

// How many times data transfer should occur, in seconds
const unsigned int sendInterval = 6 * 60;

Adafruit_BME280 bme;

TinyLoRa lora = TinyLoRa(2, 10);
uint16_t frameCounter = 0;

void setup()
{
    //delay(100);
    //Serial.begin(115200);
    //while (! Serial);
}

void loop()
{
    //Serial.println("delaying...");
    for(int i = 0; i < ((sendInterval) / 8); i++) {
        LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF); 

        //Funkmodul abschalten
        pinMode(lora_en1, INPUT);
        pinMode(lora_en2, INPUT);
        pinMode(lora_en3, INPUT); 
        digitalWrite(lora_en1, false);
        digitalWrite(lora_en2, false);
        digitalWrite(lora_en3, false);
    }

    union {
        float val;
        unsigned char bytes[4];
    } tmp;

    union {
        int val;
        unsigned char bytes[2];
    } tmp2;

    //BME einschalten
    digitalWrite(bme_en, true);
    pinMode(bme_en, OUTPUT);
    delay(3);
    bme.begin();
    bme.setSampling(Adafruit_BME280::MODE_FORCED,
                    Adafruit_BME280::SAMPLING_X2, // temperature
                    Adafruit_BME280::SAMPLING_X2, // pressure
                    Adafruit_BME280::SAMPLING_X2, // humidity
                    Adafruit_BME280::FILTER_X2);
    bme.takeForcedMeasurement();

    loraData[0] = 0; //Gerätetypkennzeichner für TTN decoder
    tmp.val = bme.readTemperature();
    loraData[1] = tmp.bytes[0];
    loraData[2] = tmp.bytes[1];
    loraData[3] = tmp.bytes[2];
    loraData[4] = tmp.bytes[3];
    tmp.val = bme.readHumidity();
    loraData[5] = tmp.bytes[0];
    loraData[6] = tmp.bytes[1];
    loraData[7] = tmp.bytes[2];
    loraData[8] = tmp.bytes[3];
    tmp.val = bme.readPressure();
    loraData[9] = tmp.bytes[0];
    loraData[10] = tmp.bytes[1];
    loraData[11] = tmp.bytes[2];
    loraData[12] = tmp.bytes[3];

    //BME abschalten
    pinMode(bme_en, INPUT);
    digitalWrite(bme_en, false);

    tmp2.val = analogRead(A7);
    loraData[13] = tmp2.bytes[0];
    loraData[14] = tmp2.bytes[1];

    //Funkmodul einschalten
    digitalWrite(lora_en1, true);
    digitalWrite(lora_en2, true);
    digitalWrite(lora_en3, true);
    pinMode(lora_en1, OUTPUT);
    pinMode(lora_en2, OUTPUT);
    pinMode(lora_en3, OUTPUT);
    delay(3);
    lora.setChannel(CH2);
    lora.setDatarate(SF9BW125);
    lora.begin();
    
    lora.frameCounter = frameCounter;

    //Serial.println("Sending LoRa Data...");
    lora.sendData(loraData, sizeof(loraData), lora.frameCounter);
    //Serial.print("Frame Counter: ");Serial.println(lora.frameCounter);
    
    frameCounter++;
}

function Bytes2Float32(bytes) {
    var sign = (bytes & 0x80000000) ? -1 : 1;
    var exponent = ((bytes >> 23) & 0xFF) - 127;
    var significand = (bytes & ~(-1 << 23));
    if (exponent == 128) 
        return sign * ((significand) ? Number.NaN : Number.POSITIVE_INFINITY);
    if (exponent == -127) {
        if (significand === 0)  return sign * 0.0 ;
        exponent = -126;
        significand /= (1 << 22);
    } else significand = (significand | (1 << 23)) / (1 << 23);
    return sign * significand * Math.pow(2, exponent);
}

function Decoder(bytes, port) {
  if (port === 1) {
    if(bytes[0] == 0) { //Format Selector
      return {
          temperature: Bytes2Float32(bytes[3+1]<<24 | bytes[2+1]<<16 | bytes[1+1]<<8 | bytes[0+1]),
          humidity: Bytes2Float32(bytes[3+4+1]<<24 | bytes[2+4+1]<<16 | bytes[1+4+1]<<8 | bytes[0+4+1]),
          pressure: Bytes2Float32(bytes[3+8+1]<<24 | bytes[2+8+1]<<16 | bytes[1+8+1]<<8 | bytes[0+8+1]),
          battery: bytes[1+12+1]<<8 | bytes[0+12+1]
      };
    }
  }
}

//Temperatursensor 1
createState("custom.ttn.temp_sensor01.temperature", false, {
    name: "Temperature",
    read: true, 
    write: false, 
    desc: "", 
    def: 0, 
    unit: "°C",
    role: "value.temperature",
    type: "number"
});
createState("custom.ttn.temp_sensor01.humidity", false, {
    name: "Humidity",
    read: true, 
    write: false, 
    desc: "", 
    def: 0, 
    unit: "%",
    role: "value.humidity",
    type: "number"
});
createState("custom.ttn.temp_sensor01.pressure", false, {
    name: "Pressure",
    read: true, 
    write: false, 
    desc: "", 
    def: 0, 
    unit: "hPa",
    role: "value.pressure",
    type: "number"
});
createState("custom.ttn.temp_sensor01.battery", false, {
    name: "Battery",
    read: true, 
    write: false, 
    desc: "", 
    def: 0, 
    unit: "V",
    role: "",
    type: "number"
});

//const fs = require('fs');

on({id: 'mqtt.1.mh-sensornetwork.devices.temp_sensor01.up', change: "ne"}, function (obj) {
    obj = JSON.parse(getState("mqtt.1.mh-sensornetwork.devices.temp_sensor01.up").val);
    setState("custom.ttn.temp_sensor01.temperature", parseFloat(obj["payload_fields"]["temperature"].toFixed(2)), true);
    setState("custom.ttn.temp_sensor01.humidity", parseFloat(obj["payload_fields"]["humidity"].toFixed(2)), true);
    setState("custom.ttn.temp_sensor01.pressure", parseFloat((obj["payload_fields"]["pressure"]/100.0).toFixed(2)), true);
    setState("custom.ttn.temp_sensor01.battery", parseFloat(((3.3/1024.0)*parseFloat(obj["payload_fields"]["battery"])*2.0).toFixed(2)), true);

    /*
    var file = "/opt/iobroker/ttn_log.csv";
    if(!fs.existsSync(file)) {
        fs.writeFileSync(file, "Time\tData\r\n");
    }
    fs.appendFileSync(file, (new Date()).toISOString() + "\t" + getState("mqtt.1.mh-sensornetwork.devices.temp_sensor01.up").val + "\r\n");
    */
});