use a non blocking dht22 library

CMakeLists.txt

@@ -10,7 +10,7 @@ set(CMAKE_SYSTEM_NAME Generic)
 set(CMAKE_C_COMPILER_WORKS 1)
 set(CMAKE_CXX_COMPILER_WORKS 1)
 
-project("PumpenSteuerung" C CXX)
+project("pumpensteuerung" C CXX)
 
 include(CMakeListsPrivate.txt)
 

platformio.ini

@@ -12,8 +12,7 @@
 platform = espressif8266
 board = esp07
 framework = arduino
-
-lib_deps =
-    SPI
-    Wire
-    DHT sensor library
+lib_deps = 
+	SPI
+	Wire
+	bertmelis/DHT@1.0.1

src/Heating.cpp

@@ -5,7 +5,7 @@
 #include "Heating.h"
 #include "Pins.h"
 
-void Heating::init(Temperature *tempsensor, unsigned mode) {
+void Heating::init(unsigned mode) {
     switch (mode) {
         case TIME: {
             const unsigned percentOn = 20;
@@ -40,18 +40,17 @@ void Heating::init(Temperature *tempsensor, unsigned mode) {
         case HUMIDITY:
             mHeatingStatus = false;
 
-            mHeizungTicker.attach(10, [&tempsensor, this]() {
-                // shedule this function because tempread is blocking
-                schedule_function([this, &tempsensor]() {
-                    // check temperature
-                    Serial.println("checking humidity");
-                    const float hum = tempsensor->getHum();
-                    if (hum == -1) return;
+            sensor.setPin(TempSensorPin);
 
-                    Serial.print("humidity read: ");
-                    Serial.println(hum);
+            sensor.onData([this](float hum, float temp) {
+                schedule_function([hum, temp, this]() {
+                    Serial.printf("Temp: %gdegC\n", temp);
+                    Serial.printf("Humid: %g%%\n", hum);
 
-                    if (hum > 65.0) {
+                    this->lasttemp = temp;
+                    this->lasthum = hum;
+
+                    if (hum > 70.0) {
                         // turn off active turnoff timers
                         mLuefterTicker.detach();
                         Serial.println("heating should run now!");
@@ -59,7 +58,7 @@ void Heating::init(Temperature *tempsensor, unsigned mode) {
                         digitalWrite(LuefterPin, HIGH);
                         digitalWrite(HeizungPin, HIGH);
                         mHeatingStatus = true;
-                    } else if (hum < 60.0) {
+                    } else if (hum < 65.0) {
                         // if humidity too low turn off heating and fan after 60secs
                         digitalWrite(HeizungPin, LOW);
                         Serial.println("heating should NOT run now!");
@@ -69,15 +68,47 @@ void Heating::init(Temperature *tempsensor, unsigned mode) {
                             mLuefterTicker.once(60, []() {
                                 // turn off fan
                                 digitalWrite(LuefterPin, LOW);
-                                Serial.println("turning off fan");
+                                schedule_function([]() {
+                                    Serial.println("turning off fan");
+                                });
                             });
                         }
                         mHeatingStatus = false;
                     }
                 });
             });
+
+            sensor.onError([this](uint8_t e) {
+                this->lasttemp = -1.0;
+                this->lasthum = -1.0;
+
+                schedule_function([e]() {
+                    Serial.printf("Error: %d\n", e);
+                });
+            });
+
+            mHeizungTicker.attach(10, [this]() {
+                sensor.read();
+            });
+
             break;
         default:
             break;
     }
 }
+
+float *Heating::getLastTemp() {
+    return &lasttemp;
+}
+
+float *Heating::getLastHum() {
+    return &lasthum;
+}
+
+Heating::Heating() : mHeizungTicker(),
+                     mLuefterTicker(),
+                     mTurnOffTicker(),
+                     mHeatingStatus(),
+                     lasttemp(0),
+                     lasthum(0),
+                     sensor() {}

src/Heating.h

@@ -5,11 +5,17 @@
 #pragma once
 
 #include <Ticker.h>
-#include "Temperature.h"
+#include <DHT.h>
+#include "Pins.h"
 
 class Heating {
 public:
-    void init(Temperature* tempsensor, unsigned mode);
+    Heating();
+
+    void init(unsigned mode);
+
+    float* getLastHum();
+    float* getLastTemp();
 
     enum MODES {TIME, HUMIDITY};
 private:
@@ -18,4 +24,9 @@ private:
     Ticker mTurnOffTicker;
 
     bool mHeatingStatus;
+
+    float lasttemp;
+    float lasthum;
+
+    DHT22 sensor;
 };

src/Temperature.cpp

@@ -1,29 +0,0 @@
-//
-// Created by lukas on 22.08.20.
-//
-
-#include "Temperature.h"
-
-void Temperature::init() {
-    dht.begin();
-}
-
-float Temperature::getTemp() {
-    float temp = dht.readTemperature();
-    Serial.println("read temp is: " + String(temp));
-    if (isnan(temp)) {
-        return -1;
-    } else {
-        return temp;
-    }
-}
-
-float Temperature::getHum() {
-    float hum = dht.readHumidity();
-    Serial.println("read hum is: " + String(hum));
-    if (isnan(hum)) {
-        return -1;
-    } else {
-        return hum;
-    }
-}

src/Temperature.h

@@ -1,34 +0,0 @@
-//
-// Created by lukas on 22.08.20.
-//
-
-#pragma once
-
-#include <Adafruit_Sensor.h>
-#include <DHT.h>
-#include "Pins.h"
-
-class Temperature {
-public:
-    Temperature() : dht(TempSensorPin, DHT22){};
-
-    /**
-     * initialize the temperature sensor
-     */
-    void init();
-
-    /**
-     * read the temperature value in C
-     * @return float value of temperature
-     */
-    float getTemp();
-
-    /**
-     * read current humidity value in %
-     * @return float value of humidity
-     */
-    float getHum();
-
-private:
-    DHT dht;
-};

src/WifiManager.cpp

@@ -6,7 +6,10 @@
 #include "WifiManager.h"
 #include "Pins.h"
 
-void WifiManager::init(Temperature* tempsensor) {
+void WifiManager::init(float* hum, float* temp) {
+    this->hum = hum;
+    this->temp = temp;
+
     Serial.print("Setting up Access Point");
     // start softap
     const bool result = WiFi.softAP("PumpenSteuerung-Heiligenbrunner", "1qayxsw2");
@@ -31,9 +34,6 @@ void WifiManager::init(Temperature* tempsensor) {
     } else {
         Serial.println("Wifi Setup failed!");
     }
-
-    // init temperature sensor
-    temp = *tempsensor;
 }
 
 WifiManager::WifiManager() : server(80), lastPumpTime(0), lastWaterOutage(0), lastPumpDuration(0) {}
@@ -108,8 +108,8 @@ void WifiManager::handleRoot() {
     index_html += "<div>Drucksensor: " + String((digitalRead(DruckSensorPin) ? "EIN" : "AUS")) + "</div>";
     index_html += "<div>Wassersensor: " + String((digitalRead(WasserSensorPin) ? "EIN" : "AUS")) + "</div>";
 
-    index_html += "</br><div>Temperatur: " + String(this->temp.getTemp()) + "C</div>";
-    index_html += "<div>Relative Luftfeuchtigkeit: " + String(this->temp.getHum()) + "%</div>";
+    index_html += "</br><div>Temperatur: " + String(*temp) + "C</div>";
+    index_html += "<div>Relative Luftfeuchtigkeit: " + String(*hum) + "%</div>";
 
     index_html += "</body></html>";
 
@@ -171,7 +171,3 @@ void WifiManager::setlastWaterOutage(unsigned long lastWaterOutage) {
 void WifiManager::setPumpDuration(unsigned long lastPumpDuration) {
     this->lastPumpDuration = lastPumpDuration;
 }
-
-Temperature *WifiManager::getTemperatureSensor() {
-    return &temp;
-}

src/WifiManager.h

@@ -7,7 +7,6 @@
 #include <Arduino.h>
 #include <ESP8266WiFi.h>
 #include <ESP8266WebServer.h>
-#include "Temperature.h"
 
 class WifiManager {
 public:
@@ -16,7 +15,7 @@ public:
     /**
      * initialize the webserver
      */
-    void init(Temperature* tempsensor);
+    void init(float* hum, float* temp);
 
     /**
      * handles new web requests and holds the webserver alive
@@ -48,12 +47,9 @@ public:
      */
     void setPumpDuration(unsigned long lastPumpDuration);
 
-    Temperature* getTemperatureSensor();
-
 private:
 
     ESP8266WebServer server;
-    Temperature temp;
 
     void handleRoot();
 
@@ -62,4 +58,7 @@ private:
     void handleGet();
 
     unsigned long lastPumpTime, lastWaterOutage, lastPumpDuration;
+
+    float* hum;
+    float* temp;
 };

src/main.cpp

@@ -1,12 +1,10 @@
 #include <Arduino.h>
 #include <Ticker.h>
-#include <EEPROM.h>
 
 #include "WifiManager.h"
 #include "Heating.h"
 
 #include "Pins.h"
-#include "Temperature.h"
 
 #define VERSION "v1.1.1"
 
@@ -26,7 +24,6 @@ Ticker pumpendauer;
 
 WifiManager mang;
 Heating mHeat;
-Temperature temp;
 
 long turnontime = -1;
 
@@ -151,7 +148,7 @@ void setup() {
     digitalWrite(HeizungPin, LOW);
 
     // initilize serial connection
-    Serial.begin(9600);
+    Serial.begin(115200);
     Serial.println("\n\n\n\nstartup of ESP");
     Serial.print("Version: ");
     Serial.println(VERSION);
@@ -176,18 +173,13 @@ void setup() {
     attachInterrupt(digitalPinToInterrupt(WasserSensorPin), WasserSensorInt, CHANGE);
 
 
-    // initialize wifi
-    Serial.println("initializing temperature sensor!");
-    temp.init();
-    Serial.print("initial read temperature: ");
-    Serial.println(temp.getTemp());
-
-    Serial.println("Initializing wifi");
-    mang.init(&temp);
-
     // initialize heating control
     Serial.println("initializing heating service");
-    mHeat.init(&temp, Heating::HUMIDITY);
+    mHeat.init(Heating::HUMIDITY);
+
+    // initialize wifi
+    Serial.println("Initializing wifi");
+    mang.init(mHeat.getLastHum(), mHeat.getLastTemp());
 
     Serial.println("startup sequence complete!\n");
     digitalWrite(LED_BUILTIN, HIGH);