DHT-usage switchable, MQTT authentication optional, soil-sensor-parameter moved to config-file

esp-receiver/src/config.h.example

@@ -7,5 +7,12 @@
 const char *MQTT_BROKER = "192.168.178.74";
 const char *MQTT_SENSOR_TOPIC = "living/sensor2";
 const char *MQTT_CLIENT_ID = "living_mobile_sensor";
+const char *MQTT_LAST_WILL_TOPIC = "living/sensor2/status";
+const char *MQTT_LAST_WILL_MSG = "offline";
+const char *MQTT_CLIENT_USER = "NULL"; // if NULL, no username or password is used
+const char *MQTT_CLIENT_PW = "NULL";   // if NULL, no password is used
+
+const int AirValue = 800;   //replace the value with value when placed in air
+const int WaterValue = 345; //replace the value with value when placed in water
 
 #endif

esp-receiver/src/main.cpp

@@ -36,9 +36,8 @@ uint8_t rh_buf[RH_BUF_LEN];
  * */
 #include "config.h"
 
-
+// const int AirValue = 800;   //replace the value with value when placed in air
-const int AirValue = 800;   //replace the value with value when placed in air
+// const int WaterValue = 345; //replace the value with value when placed in water
-const int WaterValue = 345; //replace the value with value when placed in water
 
 volatile boolean new_value = false;
 
@@ -55,6 +54,7 @@ RH_ASK driver(RH_SPEED, RH_RX_PIN);
 #define MSG_BAT 0x20
 #define MSG_TEMPHUM 0x30
 #define MSG_ERR 0x40
+#define MSG_HUM 0x50
 
 char buff[20];
 
@@ -170,6 +170,14 @@ void loop()
       Serial.println(SoilHumidity);
       new_value = true;
       break;
+    case MSG_HUM:
+      Serial.println("Soil Humidity");
+      memcpy(&soil, &rh_buf[1], 2);
+      Serial.println(soil);
+      SoilHumidity = (float)(map(soil, AirValue, WaterValue, 0, 100));
+      Serial.println(SoilHumidity);
+      new_value = true;
+      break;
     case MSG_BAT:
       // battery data
       digitalWrite(LED_BUILTIN, LOW);
@@ -215,7 +223,9 @@ void reconnect()
   {
     Serial.println("INFO: Attempting MQTT connection...");
     // Attempt to connect
-    if (mqttClient.connect(MQTT_CLIENT_ID))
+    
+    // Should work without authentication, if credentials are NULL
+    if (mqttClient.connect(MQTT_CLIENT_ID, MQTT_CLIENT_USER, MQTT_CLIENT_PW))
     {
       Serial.println("INFO: connected");
     }

sensor433/src/config.h.example

@@ -14,4 +14,7 @@
 // Sleep this many again before waging up. Sleep time in s = WATCHDOG_WAKEUP s * WATCHDOG_SLEEP_FURTHER, e.g. 8*8s = 64s
 #define WATCHDOG_SLEEP_FURTHER 8
 
+// define wether to use a DHT-Sensor or not
+bool USE_DHT_SENSOR = true;
+
 #endif

sensor433/src/main.cpp

@@ -68,7 +68,10 @@ void setup()
   pinMode(SOIL_PIN, INPUT);
 
   // init the DHT22
+  if (USE_DHT_SENSOR == 1)
+  {
     dht_init(&dht, DHT_PIN);
+  }
 
   uint8_t num_blink = 3;
 
@@ -112,7 +115,9 @@ void loop()
       memcpy(&rh_buf[1], &battery, 4);
       rh_send(rh_buf,RH_BUF_LEN);
     }
-    else if (dht_read_data(&dht, &t, &h) == 1)
+    else if (USE_DHT_SENSOR == 1)
+    {
+      if (dht_read_data(&dht, &t, &h) == 1)
       {
         rh_buf[0] = MSG_TEMPHUM;
         memcpy(&rh_buf[1], &t, 4);
@@ -131,6 +136,15 @@ void loop()
         rh_buf[0] = MSG_ERR;
         rh_send(rh_buf,1);
       }
+    }
+    else
+    {
+      rh_buf[0] = MSG_HUM;
+      soil = analogRead(SOIL_PIN);
+      memcpy(&rh_buf[1], &soil, 2);
+
+      rh_send(rh_buf,RH_BUF_LEN);
+    }
     counter++;
 
     // turn off the LED and transistor:

sensor433/src/sensor433.h

@@ -47,6 +47,7 @@
 #define MSG_BAT 0x20
 #define MSG_TEMPHUM 0x30
 #define MSG_ERR 0x40
+#define MSG_HUM 0x50 // case, sensor just reads soil-humidity
 
 // for watchdog wakeup
 // https://gist.github.com/dwhacks/8055287