Building a MQTT Gateway



  • Hi Guys! I'm newbie.I want to do smarthome with MQTT and OpenHab. I start to build a MQTT Gateway (Ethernet Shield w5100). This result :

    alt text

    it's working?. i don't see line "Sending message on topic: mygateway1-out/2/1/1/0/49"

    My Sketch :

    // Enable debug prints to serial monitor
    #define MY_DEBUG
    
    // Enables and select radio type (if attached)
    //#define MY_RADIO_NRF24
    //#define MY_RADIO_RFM69
    
    #define MY_GATEWAY_MQTT_CLIENT
    
    // Set this node's subscribe and publish topic prefix
    #define MY_MQTT_PUBLISH_TOPIC_PREFIX "mygateway1-out/2/1/1/0/49"
    #define MY_MQTT_SUBSCRIBE_TOPIC_PREFIX "mygateway1-in/2/1/1/0/49"
    
    // Set MQTT client id
    #define MY_MQTT_CLIENT_ID "mysensors-1"
    
    // W5100 Ethernet module SPI enable (optional if using a shield/module that manages SPI_EN signal)
    //#define MY_W5100_SPI_EN 4
    
    // Enable Soft SPI for NRF radio (note different radio wiring is required)
    // The W5100 ethernet module seems to have a hard time co-operate with
    // radio on the same spi bus.
    //#if !defined(MY_W5100_SPI_EN) && !defined(ARDUINO_ARCH_SAMD)
     // #define MY_SOFTSPI
     // #define MY_SOFT_SPI_SCK_PIN 14
    //  #define MY_SOFT_SPI_MISO_PIN 16
     // #define MY_SOFT_SPI_MOSI_PIN 15
    //#endif
    
    // When W5100 is connected we have to move CE/CSN pins for NRF radio
     // #ifndef MY_RF24_CE_PIN
      //#define MY_RF24_CE_PIN 5
      //#endif
      //#ifndef MY_RF24_CS_PIN
     // #define MY_RF24_CS_PIN 6
    //#endif
    
    // Enable these if your MQTT broker requires usenrame/password
    //#define MY_MQTT_USER "username"
    //#define MY_MQTT_PASSWORD "password"
    
    // Enable MY_IP_ADDRESS here if you want a static ip address (no DHCP)
    #define MY_IP_ADDRESS 192,168,10,103
    
    // If using static ip you need to define Gateway and Subnet address as well
    #define MY_IP_GATEWAY_ADDRESS 192,168,10,1
    #define MY_IP_SUBNET_ADDRESS 255,255,255,0
    
    // MQTT broker ip address or url. Define one or the other.
    //#define MY_CONTROLLER_URL_ADDRESS "m20.cloudmqtt.com"
    #define MY_CONTROLLER_IP_ADDRESS 192, 168, 10, 102
    
    // The MQTT broker port to to open
    #define MY_PORT 1883
    
     /*
    // Enable inclusion mode
    #define MY_INCLUSION_MODE_FEATURE
    // Enable Inclusion mode button on gateway
    //#define MY_INCLUSION_BUTTON_FEATURE
    // Set inclusion mode duration (in seconds)
    #define MY_INCLUSION_MODE_DURATION 60
    // Digital pin used for inclusion mode button
    //#define MY_INCLUSION_MODE_BUTTON_PIN  3
    
    // Set blinking period
    #define MY_DEFAULT_LED_BLINK_PERIOD 300
    
    // Flash leds on rx/tx/err
    // Uncomment to override default HW configurations
    //#define MY_DEFAULT_ERR_LED_PIN 16  // Error led pin
    //#define MY_DEFAULT_RX_LED_PIN  16  // Receive led pin
    //#define MY_DEFAULT_TX_LED_PIN  16  // the PCB, on board LED
    */
    
    #include <Ethernet.h>
    #include <MySensors.h>
    #include <SPI.h>
    #include <DHT.h>
    
    // set this to the pin you connected the DHT's data pin to
    #define DHT_DATA_PIN 2
    
    // Set this offset if the sensor has a permanent small offset to the real temperatures
    #define SENSOR_TEMP_OFFSET 0
    
    // Sleep time between sensor updates (in milliseconds)
    // Must be >1000ms for DHT22 and >2000ms for DHT11
    static const uint64_t UPDATE_INTERVAL = 30000;
    
    // Force sending an update of the temperature after n sensor reads, so a controller showing the
    // timestamp of the last update doesn't show something like 3 hours in the unlikely case, that
    // the value didn't change since;
    // i.e. the sensor would force sending an update every UPDATE_INTERVAL*FORCE_UPDATE_N_READS [ms]
    static const uint8_t FORCE_UPDATE_N_READS = 10;
    
    #define CHILD_ID_HUM 0
    #define CHILD_ID_TEMP 1
    
    float lastTemp;
    float lastHum;
    uint8_t nNoUpdatesTemp;
    uint8_t nNoUpdatesHum;
    bool metric = true;
    
    MyMessage msgHum(CHILD_ID_HUM, V_HUM);
    MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
    DHT dht;
    
    void setup() {
      dht.setup(DHT_DATA_PIN); // set data pin of DHT sensor
      if (UPDATE_INTERVAL <= dht.getMinimumSamplingPeriod()) {
        Serial.println("Warning: UPDATE_INTERVAL is smaller than supported by the sensor!");
      }
      // Sleep for the time of the minimum sampling period to give the sensor time to power up
      // (otherwise, timeout errors might occure for the first reading)
      sleep(dht.getMinimumSamplingPeriod());
    }
    
    void presentation() {
      // Present locally attached sensors here
      // Send the sketch version information to the gateway
      sendSketchInfo("TemperatureAndHumidity", "1.1");
    
      // Register all sensors to gw (they will be created as child devices)
      present(CHILD_ID_HUM, S_HUM);
      present(CHILD_ID_TEMP, S_TEMP);
    
      metric = getConfig().isMetric;
    }
    
    
    void loop() {
      // Send locally attached sensors data here
      // Force reading sensor, so it works also after sleep()
      dht.readSensor(true);
    
      // Get temperature from DHT library
      float temperature = dht.getTemperature();
      if (isnan(temperature)) {
        Serial.println("Failed reading temperature from DHT!");
      } else if (temperature != lastTemp || nNoUpdatesTemp == FORCE_UPDATE_N_READS) {
        // Only send temperature if it changed since the last measurement or if we didn't send an update for n times
        lastTemp = temperature;
        if (!metric) {
          temperature = dht.toFahrenheit(temperature);
        }
        // Reset no updates counter
        nNoUpdatesTemp = 0;
        temperature += SENSOR_TEMP_OFFSET;
        send(msgTemp.set(temperature, 1));
    
        #ifdef MY_DEBUG
        Serial.print("T: ");
        Serial.println(temperature);
        #endif
      } else {
        // Increase no update counter if the temperature stayed the same
        nNoUpdatesTemp++;
      }
    
      // Get humidity from DHT library
      float humidity = dht.getHumidity();
      if (isnan(humidity)) {
        Serial.println("Failed reading humidity from DHT");
      } else if (humidity != lastHum || nNoUpdatesHum == FORCE_UPDATE_N_READS) {
        // Only send humidity if it changed since the last measurement or if we didn't send an update for n times
        lastHum = humidity;
        // Reset no updates counter
        nNoUpdatesHum = 0;
        send(msgHum.set(humidity, 1));
    
        #ifdef MY_DEBUG
        Serial.print("H: ");
        Serial.println(humidity);
        #endif
      } else {
        // Increase no update counter if the humidity stayed the same
        nNoUpdatesHum++;
      }
    
      // Sleep for a while to save energy
      sleep(UPDATE_INTERVAL);
    }
    

    i combine sketch "humiditysensor" and " MQTTGateway". is it right?
    thank you for help !


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