DHT: get temp and humidity

And save them with mqtt

WifiControlSensor/BMP180.h

@@ -17,5 +17,5 @@ bool BMP180IsConnected();
 int BMP180GetTemperature(double &t){return 0;};
 int BMP180GetTempAndPressure(double &t, double &p){return 0;};
 int BMP180Setup(int , int ){SKETCH_DEBUG_PRINTLN("BMP180 is disabled at build time"); return 0;};
-bool BMP180IsConnected(){return 0;};
+bool BMP180IsConnected(){return false;};
 #endif

WifiControlSensor/MQTT.ino

@@ -38,8 +38,8 @@ int MqttSetup(char *server, char *user, char *passwd, int port, char * hostname)
   mqttId = hostname;
   snprintf(temperatureFeed, FEED_MAX_SIZE, TEMPERATURE_FEED_FORMAT, mqttId);
   snprintf(pressureFeed, FEED_MAX_SIZE, PRESSURE_FEED_FORMAT, mqttId);
-  snprintf(temperatureDhtFeed, FEED_MAX_SIZE, TEMPERATURE_FEED_FORMAT, mqttId);
-  snprintf(humidityDhtFeed, FEED_MAX_SIZE, PRESSURE_FEED_FORMAT, mqttId);
+  snprintf(temperatureDhtFeed, FEED_MAX_SIZE, TEMPERATURE_DHT_FEED_FORMAT, mqttId);
+  snprintf(humidityDhtFeed, FEED_MAX_SIZE, HUMIDITY_DHT_FEED_FORMAT, mqttId);
 
   mqtt = new Adafruit_MQTT_Client(&client, server, port, user, passwd);
   mqtt_temp =  new Adafruit_MQTT_Publish(mqtt, temperatureFeed);
@@ -102,7 +102,7 @@ int MqttPublish(double temp, double pressure) {
   return 0;
 }
 
-int MqttDhtPublish(double temp, double humidity) {
+int MqttDhtPublish(float temp, float humidity) {
   if (MqttConnect() == 0) {
     SKETCH_DEBUG_PRINTLN("publishing DHT!");
     mqtt_dht_temp->publish(temp);

WifiControlSensor/WifiControlSensor.ino

@@ -40,6 +40,7 @@
 
 #include "debug_sketch.h"
 #include "BMP180.h"
+#include "sensor_DHT.h"
 #include "Adafruit_MQTT.h"
 #include "Adafruit_MQTT_Client.h"
 
@@ -54,6 +55,7 @@ char eeprom[CONFIG_EEPROM_SIZE];
 #define BOOTMODE_OTA    2
 
 double temp, pressure;
+float dhtTemp, dhtHumidity;
 uint8_t mode;
 char *hostName = "";
 
@@ -87,6 +89,7 @@ int MqttConnect();
 int MqttIsConnected();
 int MqttSetup(char *server, char *user, char *passwd, int port, char * hostname);
 int MqttPublish(double temp, double pressure);
+int MqttDhtPublish(float temp, float humidity);
 void MqttCheckSubscription();
 void MqttChangeGpioValue(int gpio, int value);
 bool MqttIsConfigured();
@@ -238,8 +241,12 @@ void setup() {
   if (mode == BOOTMODE_OTA) {
     OTASetup();
   } else {
-    if (BMP180Setup(CONFIG_BMP180_SDA, CONFIG_BMP180_SCL))
+    if (BMP180Setup(CONFIG_BMP180_SDA, CONFIG_BMP180_SCL)){
       SKETCH_DEBUG_PRINTLN("BMP180 init success");
+    }
+    if (DHTSetup(CONFIG_DHT_PIN)){
+      SKETCH_DEBUG_PRINTLN("DHT init success");
+    }
     WebSetupServer(mode);
   }
 #ifdef CONFIG_ENABLE_POWER_SAVE
@@ -259,9 +266,9 @@ void loop() {
       MqttCheckSubscription();
     delay(CONFIG_WEB_DELAY_MS);
 
-#ifdef CONFIG_ENABLE_BMP180
     nbCycle++;
     if (nbCycle > CONFIG_SAMPLING_PERIODE_MS / CONFIG_WEB_DELAY_MS) {
+#ifdef CONFIG_ENABLE_BMP180
       if (BMP180IsConnected() && BMP180GetTempAndPressure(temp, pressure) == 0) {
         SKETCH_DEBUG_PRINT("Current T°C ");
         SKETCH_DEBUG_PRINT(temp);
@@ -272,9 +279,18 @@ void loop() {
       } else {
         SKETCH_DEBUG_PRINTLN("Cannot get T°C");
       }
-      nbCycle = 0;
-
+#endif
+#ifdef CONFIG_ENABLE_DHT
+      if (DHTIsConnected() && DHTGetTempAndHumidity(dhtTemp, dhtHumidity) == 0) {
+        SKETCH_DEBUG_PRINT("Current T°C ");
+        SKETCH_DEBUG_PRINT(dhtTemp);
+        SKETCH_DEBUG_PRINT(" Humidity ");
+        SKETCH_DEBUG_PRINTLN(dhtHumidity);
+        if (MqttIsConfigured())
+          MqttDhtPublish(dhtTemp, dhtHumidity);
       }
 #endif
+      nbCycle = 0;
+    }
   }
 }

WifiControlSensor/config.h

@@ -13,13 +13,15 @@
 #define CONFIG_SAMPLING_PERIODE_MS 60000
 #endif
 
-#ifdef CONFIG_ENABLE_BMP180
 #ifndef CONFIG_BMP180_SDA
 #define CONFIG_BMP180_SDA 12
 #endif
 #ifndef CONFIG_BMP180_SLC
 #define CONFIG_BMP180_SLC 14
 #endif
+
+#ifndef CONFIG_DHT_PIN
+#define CONFIG_DHT_PIN 2
 #endif
 
 #ifndef CONFIG_SSID_NAME

WifiControlSensor/config_device.h

@@ -12,6 +12,9 @@
 #define CONFIG_BMP180_SDA 12
 #define CONFIG_BMP180_SCL 14
 
+#define CONFIG_ENABLE_DHT
+#define CONFIG_DHT_PIN 2
+
 // Enable light sleep to save some power (http://bbs.espressif.com/viewtopic.php?f=6&t=133&p=485&hilit=sleep+modem#p485)
 // Switch off internal LED
 // Disable mDNS

WifiControlSensor/sensor_DHT.h

@@ -0,0 +1,14 @@
+#pragma once
+#ifdef CONFIG_ENABLE_DHT
+#include <DHT.h>
+#define DHTTYPE DHT11
+DHT *dht = NULL;
+int DHTSetup(int pin);
+int DHTGetTempAndHumidity(float &t, float &h);
+bool DHTIsConnected();
+
+#else //CONFIG_ENABLE_DHT
+int DHTSetup(int pin){SKETCH_DEBUG_PRINTLN("DHT is disabled at build time"); return 0};
+int DHTGetTempAndHumidity(float &t, float &h){return 0;};
+bool DHTIsConnected(){return false;};
+#endif

WifiControlSensor/sensor_DHT.ino

@@ -0,0 +1,29 @@
+#ifdef CONFIG_ENABLE_DHT
+#include "sensor_DHT.h"
+int DHTSetup(int pin){
+    dht = new DHT(pin, DHTTYPE);
+    dht->begin();
+    return 0; 
+}
+
+int DHTGetTempAndHumidity(float &t, float &h){
+    int ret = 0;
+    t = dht->readTemperature();
+    h = dht->readHumidity();
+    if(isnan(t)){
+        t = 0;
+        ret = -1;
+    }
+    if(isnan(h)){
+        h = 0;
+        ret = -1;
+    }
+    return ret;
+}
+
+bool DHTIsConnected(){
+    //No way to know if connected
+    //Check at least if initialized
+    return dht != NULL;
+}
+#endif