Dallas DS18B20 Temperaturmessung MYSENSORS API 2.0 und FHEM

Überwachung der Wassertemperatur im Aussentank

Hier nun die 2.1 Version zur API 2.0. Basis ist der Sketch von MYSENSORS.ORG. Über den Debug-Modus habe ich herausgefunden, dass von FHEM keine Node-ID vergeben wurde. Dies habe ich dann mit #define MY_NODE_ID fest eingestellt. Damit lief dann alles. Im Original-Sketch wird der Arduino noch für die Übertragungszeit schlafen gelegt. Die Funktion habe ich erst mal deaktiviert. Vielleicht kümmere ich mich später darum. Ich verwende den Sketch, um mit einem wasserdichten DS18B20 die Temperatur im Außenwassertank zu überwachen.

/**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * DESCRIPTION
 *
 * Example sketch showing how to send in DS1820B OneWire temperature readings back to the controller
 * http://www.mysensors.org/build/temp
 */

//v2.1 Anpassung auf API 2.0 von JH
#define MY_RADIO_NRF24
#define MY_DEBUG    // Enables debug messages in the serial log 
#define MY_NODE_ID 42 // Sets a static id for a node
#include <MySensors.h>  
#include <SPI.h>
#include <DallasTemperature.h>
#include <OneWire.h>

#define COMPARE_TEMP 1 // Send temperature only if changed? 1 = Yes 0 = No

#define ONE_WIRE_BUS 4 // Pin where dallase sensor is connected 
#define MAX_ATTACHED_DS18B20 16
unsigned long SLEEP_TIME = 3000; // Sleep time between reads (in milliseconds)
OneWire oneWire(ONE_WIRE_BUS); // Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
DallasTemperature sensors(&oneWire); // Pass the oneWire reference to Dallas Temperature. 

float lastTemperature[MAX_ATTACHED_DS18B20];
int numSensors=0;
boolean receivedConfig = false;
boolean metric = true; 
// Initialize temperature message
MyMessage msg(0,V_TEMP);

void setup()  
{ 
sensors.setResolution(TEMP_12_BIT); // Genauigkeit auf 12-Bit setzen
  
}
void presentation(){
  
  // Startup up the OneWire library
  sensors.begin();
  // requestTemperatures() will not block current thread
  sensors.setWaitForConversion(false);

  // Startup and initialize MySensors library. Set callback for incoming messages. 
  

  // Send the sketch version information to the gateway and Controller
  sendSketchInfo("Temperature Sensor", "2.1");

  // Fetch the number of attached temperature sensors  
  numSensors = sensors.getDeviceCount();

  // Present all sensors to controller
  for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {   
  present(i, S_TEMP);
  }
}


void loop()     
{     
  

  // Fetch temperatures from Dallas sensors
  sensors.requestTemperatures();

  // query conversion time and sleep until conversion completed
  //int16_t conversionTime = sensors.millisToWaitForConversion(sensors.getResolution());
  // sleep() call can be replaced by wait() call if node need to process incoming messages (or if node is repeater)
  //sleep(conversionTime);

  // Read temperatures and send them to controller 
  for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {
 
    // Fetch and round temperature to one decimal
    float temperature = static_cast<float>(static_cast<int>((getConfig().isMetric?sensors.getTempCByIndex(i):sensors.getTempFByIndex(i)) * 10.)) / 10.;
 
    // Only send data if temperature has changed and no error
    #if COMPARE_TEMP == 1
    if (lastTemperature[i] != temperature && temperature != -127.00 && temperature != 85.00) {
    #else
    if (temperature != -127.00 && temperature != 85.00) {
    #endif
 
      // Send in the new temperature
      send(msg.setSensor(i).set(temperature,2));
      // Save new temperatures for next compare
      lastTemperature[i]=temperature;
    }
  }
  sleep(SLEEP_TIME);
}

 

Schreibe einen Kommentar

Deine E-Mail-Adresse wird nicht veröffentlicht. Erforderliche Felder sind mit * markiert.