sht20 support

esp32/include/ControllerConfiguration.h

@@ -21,8 +21,8 @@
 #define OUTPUT_ENABLE_PUMP   GPIO_NUM_13 /**< GPIO 13 - Enable Pumps  */
 
 #define SENSOR_ONEWIRE      GPIO_NUM_4 /**< GPIO 12 - Temperatur sensor, Battery and other cool onewire stuff */
-#define SENSOR_TANK_ECHO    GPIO_NUM_16 /**< GPIO 16 - echo feedback of water sensor */ 
+#define SHARED_SCL          GPIO_NUM_16 /**< GPIO 16 - echo feedback of water sensor */ 
-#define SENSOR_TANK_TRG     GPIO_NUM_17 /**< GPIO 17 - trigger for water sensor */
+#define SENSOR_TANK_SDA     GPIO_NUM_17 /**< GPIO 17 - trigger for water sensor */
 #define BUTTON              GPIO_NUM_0  /**< GPIO 0 - Fix button of NodeMCU */
 
 #define CUSTOM1_PIN1        GPIO_NUM_34   /** direct gpio */
@@ -65,6 +65,8 @@
 #define TEMPERATUR_TIMEOUT              3000    /**< 3 Seconds timeout for the temperatur sensors */
 #define DS18B20_RESOLUTION              9       /**< 9bit temperature resolution -> 0.5°C steps */
 
+#define PLANT_WITHOUT_TEMPSENSOR 100
+
 #define UTC_OFFSET_DE                   3600    /* UTC offset in seconds for Germany */
 #define UTF_OFFSET_DE_DST               3600    /* offset in seconds if daylight saving time is active */
 

esp32/include/HomieConfiguration.h

@@ -101,7 +101,6 @@ HomieSetting<const char *> ntpServer("ntpServer", "NTP server (pool.ntp.org as d
 
 #define GENERATE_PLANT(plant, strplant)                                                                                                                                                                        \
         HomieSetting<double> mSensorDry##plant = HomieSetting<double>("dry" strplant, "Plant " strplant "- Moist sensor dry %");                                                                      \
-        HomieSetting<long> pSensorType##plant = HomieSetting<long>("sensoryType" strplant, "sensor" strplant " - sensortype");                      \
         HomieSetting<long> mPumpAllowedHourRangeStart##plant = HomieSetting<long>("hourstart" strplant, "Plant" strplant " - Range pump allowed hour start (0-23)");                                      \
         HomieSetting<long> mPumpAllowedHourRangeEnd##plant = HomieSetting<long>("hourend" strplant, "Plant" strplant " - Range pump allowed hour end (0-23)");                                            \
         HomieSetting<bool> mPumpOnlyWhenLowLight##plant = HomieSetting<bool>("lowLight" strplant, "Plant" strplant " - Enable the Pump only, when there is no sunlight"); \
@@ -109,7 +108,7 @@ HomieSetting<const char *> ntpServer("ntpServer", "NTP server (pool.ntp.org as d
         HomieSetting<long> pPumpDuration##plant = HomieSetting<long>("pumpDuration" strplant, "Plant" strplant " - time seconds to water when pump is active");                      \
         HomieSetting<long> pPumpMl##plant = HomieSetting<long>("pumpAmount" strplant, "Plant" strplant " - ml (if using flowmeter) to water when pump is active");                      \
         HomieSetting<long> pPowerLevel##plant = HomieSetting<long>("powerLevel" strplant, "Plant" strplant " - pwm duty cycle in percent");                      \
-        PlantSettings_t mSetting##plant = {&mSensorDry##plant, &pSensorType##plant, &mPumpAllowedHourRangeStart##plant, &mPumpAllowedHourRangeEnd##plant, &mPumpOnlyWhenLowLight##plant, &mPumpCooldownInMinutes##plant, &pPumpDuration##plant, &pPowerLevel##plant, &pPumpMl##plant}; \
+        PlantSettings_t mSetting##plant = {&mSensorDry##plant, &mPumpAllowedHourRangeStart##plant, &mPumpAllowedHourRangeEnd##plant, &mPumpOnlyWhenLowLight##plant, &mPumpCooldownInMinutes##plant, &pPumpDuration##plant, &pPowerLevel##plant, &pPumpMl##plant}; \
         /**< Generate all settings for one plant \
          * \
          * Feature to start pumping only at morning: @link{SOLAR_CHARGE_MIN_VOLTAGE} and @link{SOLAR_CHARGE_MAX_VOLTAGE} \

esp32/include/HomieTypes.h

@@ -17,6 +17,7 @@
         SENSOR(NONE)   \
         SENSOR(CAPACITIVE_FREQUENCY)  \
         SENSOR(ANALOG_RESISTANCE_PROBE)   \
+        SENSOR(SHT20)
 
 #define GENERATE_ENUM(ENUM) ENUM,
 #define GENERATE_STRING(STRING) #STRING,
@@ -39,7 +40,6 @@ static const char *SENSOR_STRING[] = {
 typedef struct PlantSettings_t
 {
     HomieSetting<double> *pSensorDry;
-    HomieSetting<long> *pSensorMode;
     HomieSetting<long> *pPumpAllowedHourRangeStart;
     HomieSetting<long> *pPumpAllowedHourRangeEnd;
     HomieSetting<bool> *pPumpOnlyWhenLowLight;

esp32/include/LogDefines.h

@@ -24,6 +24,8 @@
 #define LOG_SENSORMODE_UNKNOWN "Unknown sensor mode requested"
 #define LOG_SENSORMODE_UNKNOWN_CODE -5
 
+#define LOG_SENSOR_MISSING -6
+
 #define LOG_PUMP_AND_DOWNLOADMODE "Download mode, ignoring pump request"
 #define LOG_PUMP_AND_DOWNLOADMODE_CODE 2
 

esp32/include/PlantCtrl.h

@@ -19,6 +19,7 @@
 #include "MathUtils.h"
 #include "MQTTUtils.h"
 #include "LogDefines.h"
+#include "SHT2x.h"
 
 #define ANALOG_REREADS 5
 #define MOISTURE_MEASUREMENT_DURATION 400 /** ms */
@@ -32,10 +33,14 @@ private:
     HomieNode *mPlant = NULL;
     HomieInternals::PropertyInterface mPump;
     RunningMedian mMoisture_raw = RunningMedian(ANALOG_REREADS);
+    RunningMedian mTemperature_degree = RunningMedian(ANALOG_REREADS);
     int mPinSensor = 0; /**< Pin of the moist sensor */
     int mPinPump = 0;   /**< Pin of the pump */
     bool mConnected = false;
     int mPlantId = -1;
+    SENSOR_MODE mSensorMode;
+    SHT2x sht20;
+
 
 public:
     PlantSettings_t *mSetting;
@@ -48,7 +53,7 @@ public:
     Plant(int pinSensor, int pinPump,
           int plantId,
           HomieNode *plant,
-          PlantSettings_t *setting);
+          PlantSettings_t *setting, SENSOR_MODE mode);
 
     void postMQTTconnection(void);
 
@@ -64,7 +69,8 @@ public:
 
     void activatePump(void);
 
-    String getSensorModeString(){
+    String getSensorModeString()
+    {
         SENSOR_MODE mode = getSensorMode();
         return SENSOR_STRING[mode];
     }
@@ -77,9 +83,7 @@ public:
 
     SENSOR_MODE getSensorMode()
     {
-        int raw_mode = this->mSetting->pSensorMode->get();
+        return mSensorMode;
-        SENSOR_MODE sensorType = static_cast<SENSOR_MODE>(raw_mode);
-        return sensorType;
     }
 
     /**
@@ -118,24 +122,33 @@ public:
         }
     }
 
+    float getCurrentTemperature(){
+        if(mTemperature_degree.getCount() == 0){
+            return PLANT_WITHOUT_TEMPSENSOR; 
+        }
+        return mTemperature_degree.getMedian();
+    }
+
     float getCurrentMoisturePCT()
     {
-        switch (getSensorMode()){
+        switch (getSensorMode())
+        {
         case NONE:
             return DEACTIVATED_PLANT;
         case CAPACITIVE_FREQUENCY:
             return mapf(mMoisture_raw.getMedian(), MOIST_SENSOR_MAX_FRQ, MOIST_SENSOR_MIN_FRQ, 0, 100);
         case ANALOG_RESISTANCE_PROBE:
             return mapf(mMoisture_raw.getMedian(), ANALOG_SENSOR_MAX_MV, ANALOG_SENSOR_MIN_MV, 0, 100);
-        default:
+        case SHT20:
-            log(LOG_LEVEL_ERROR, LOG_SENSORMODE_UNKNOWN, LOG_SENSORMODE_UNKNOWN_CODE);
+            return mMoisture_raw.getMedian();
-            return DEACTIVATED_PLANT;
         }
+        return MISSING_SENSOR;
     }
 
     float getCurrentMoistureRaw()
     {
-        if(getSensorMode() == CAPACITIVE_FREQUENCY){
+        if (getSensorMode() == CAPACITIVE_FREQUENCY)
+        {
             if (mMoisture_raw.getMedian() < MOIST_SENSOR_MIN_FRQ)
             {
                 return MISSING_SENSOR;

esp32/platformio.ini

@@ -22,6 +22,7 @@ lib_deps = ArduinoJson@6.16.1
             DallasTemperature
             pololu/VL53L0X
             https://github.com/homieiot/homie-esp8266.git#develop
+            robtillaart/SHT2x@^0.1.3
 
 [platformio]
 

esp32/src/PlantCtrl.cpp

@@ -13,14 +13,17 @@
 #include "ControllerConfiguration.h"
 #include "TimeUtils.h"
 #include "driver/pcnt.h"
+#include "MQTTUtils.h"
 
-Plant::Plant(int pinSensor, int pinPump, int plantId, HomieNode *plant, PlantSettings_t *setting)
+Plant::Plant(int pinSensor, int pinPump, int plantId, HomieNode *plant, PlantSettings_t *setting, SENSOR_MODE mode)
 {
     this->mPinSensor = pinSensor;
     this->mPinPump = pinPump;
     this->mPlant = plant;
     this->mSetting = setting;
     this->mPlantId = plantId;
+    this->mSensorMode = mode;
+    this->sht20 = SHT2x();
 }
 
 void Plant::init(void)
@@ -30,10 +33,6 @@ void Plant::init(void)
     this->mSetting->pSensorDry->setValidator([](long candidate)
                                              { return (((candidate >= 0.0) && (candidate <= 100.0)) || equalish(candidate, DEACTIVATED_PLANT) || equalish(candidate, HYDROPONIC_MODE)); });
 
-    this->mSetting->pSensorMode->setDefaultValue(NONE);
-    this->mSetting->pSensorMode->setValidator([](long candidate)
-                                              { return candidate == NONE || candidate == CAPACITIVE_FREQUENCY || candidate == ANALOG_RESISTANCE_PROBE; });
-
     this->mSetting->pPumpAllowedHourRangeStart->setDefaultValue(8); // start at 8:00
     this->mSetting->pPumpAllowedHourRangeStart->setValidator([](long candidate)
                                                              { return ((candidate >= 0) && (candidate <= 23)); });
@@ -56,18 +55,14 @@ void Plant::init(void)
                                                   { return ((candidate >= 0) && (candidate <= 100)); });
 
     /* Initialize Hardware */
-    Serial.println("Init PWM controller for pump " + String(mPinPump) + "=" + String(OUTPUT));
-    Serial.flush();
     ledcSetup(this->mPlantId, PWM_FREQ, PWM_BITS);
     ledcAttachPin(mPinPump, this->mPlantId);
     ledcWrite(this->mPlantId, 0);
-
-    Serial.println("Set GPIO mode " + String(mPinSensor) + "=" + String(ANALOG));
-    Serial.flush();
     pinMode(this->mPinSensor, INPUT);
 }
 
-void Plant::initSensors(void){
+void Plant::initSensors(void)
+{
     switch (getSensorMode())
     {
     case CAPACITIVE_FREQUENCY:
@@ -89,16 +84,14 @@ void Plant::initSensors(void){
 
         pcnt_counter_pause(unit); // Pausa o contador PCNT
         pcnt_counter_clear(unit); // Zera o contador PCNT
-
-        Serial.println("Setup Counter " + String(mPinPump) + "=" + String(LOW));
         break;
     }
-
     case ANALOG_RESISTANCE_PROBE:
     {
         adcAttachPin(this->mPinSensor);
         break;
     }
+    case SHT20:
     case NONE:
     {
         // do nothing
@@ -117,8 +110,36 @@ void Plant::blockingMoistureMeasurement(void)
         {
             this->mMoisture_raw.add(analogReadMilliVolts(this->mPinSensor));
             delay(5);
+        }
         break;
     }
+    case SHT20:
+    {
+        
+        //do not assume valid i2c state, reinit
+        TwoWire sensorWire = TwoWire(0);
+        sensorWire.setPins(SENSOR_TANK_SDA, SHARED_SCL);
+        sht20.begin(&sensorWire);
+        sht20.reset();
+        delay(100);
+        if(!sht20.isConnected()){
+            Serial.println("SHT20 connection error");
+        }
+        bool success = sht20.read();
+        int error = sht20.getError();
+        if (error)
+        {
+            log(LOG_LEVEL_ERROR, "Failure reading SHT20 " + String(error), LOG_SENSOR_MISSING);
+        }
+        if (!success || error)
+        {
+            this->mMoisture_raw.clear();
+            this->mMoisture_raw.add(MISSING_SENSOR);
+            return;
+        }
+        mMoisture_raw.add(sht20.getHumidity());
+        mTemperature_degree.add(sht20.getTemperature());
+        break;
     }
     case CAPACITIVE_FREQUENCY:
     case NONE:
@@ -139,6 +160,7 @@ void Plant::startMoistureMeasurement(void)
         pcnt_counter_resume(unit);
         break;
     }
+    case SHT20:
     case ANALOG_RESISTANCE_PROBE:
     case NONE:
     {
@@ -170,11 +192,8 @@ void Plant::stopMoistureMeasurement(void)
         }
         break;
     }
+    case SHT20:
     case ANALOG_RESISTANCE_PROBE:
-    {
-        //nothing to do here
-        break;
-    }
     case NONE:
     {
         break;
@@ -280,4 +299,5 @@ void Plant::advertise(void)
     this->mPlant->advertise("moist").setName("Percent").setDatatype("Float").setUnit("%");
     this->mPlant->advertise("moistraw").setName("adc").setDatatype("Float").setUnit("3.3/4096V");
     this->mPlant->advertise("state").setName("state").setDatatype("String");
+    
 }

esp32/src/main.cpp

@@ -93,13 +93,13 @@ DS2438 battery(&oneWire, 0.0333333f, AMOUNT_SENOR_QUERYS);
 VL53L0X tankSensor;
 
 Plant mPlants[MAX_PLANTS] = {
-    Plant(SENSOR_PLANT0, OUTPUT_PUMP0, 0, &plant0, &mSetting0),
+    Plant(SENSOR_PLANT0, OUTPUT_PUMP0, 0, &plant0, &mSetting0, SHT20),
-    Plant(SENSOR_PLANT1, OUTPUT_PUMP1, 1, &plant1, &mSetting1),
+    Plant(SENSOR_PLANT1, OUTPUT_PUMP1, 1, &plant1, &mSetting1, ANALOG_RESISTANCE_PROBE),
-    Plant(SENSOR_PLANT2, OUTPUT_PUMP2, 2, &plant2, &mSetting2),
+    Plant(SENSOR_PLANT2, OUTPUT_PUMP2, 2, &plant2, &mSetting2, CAPACITIVE_FREQUENCY),
-    Plant(SENSOR_PLANT3, OUTPUT_PUMP3, 3, &plant3, &mSetting3),
+    Plant(SENSOR_PLANT3, OUTPUT_PUMP3, 3, &plant3, &mSetting3, CAPACITIVE_FREQUENCY),
-    Plant(SENSOR_PLANT4, OUTPUT_PUMP4, 4, &plant4, &mSetting4),
+    Plant(SENSOR_PLANT4, OUTPUT_PUMP4, 4, &plant4, &mSetting4, CAPACITIVE_FREQUENCY),
-    Plant(SENSOR_PLANT5, OUTPUT_PUMP5, 5, &plant5, &mSetting5),
+    Plant(SENSOR_PLANT5, OUTPUT_PUMP5, 5, &plant5, &mSetting5, CAPACITIVE_FREQUENCY),
-    Plant(SENSOR_PLANT6, OUTPUT_PUMP6, 6, &plant6, &mSetting6)};
+    Plant(SENSOR_PLANT6, OUTPUT_PUMP6, 6, &plant6, &mSetting6, CAPACITIVE_FREQUENCY)};
 
 /******************************************************************************
  *                            LOCAL FUNCTIONS
@@ -264,7 +264,6 @@ void readPowerSwitchedSensors()
   {
     mPlants[i].startMoistureMeasurement();
   }
-
   delay(MOISTURE_MEASUREMENT_DURATION);
   for (int i = 0; i < MAX_PLANTS; i++)
   {
@@ -289,15 +288,23 @@ void readPowerSwitchedSensors()
         Serial << "Plant " << i << " measurement: " << mPlants[i].getCurrentMoistureRaw() << " mV " << mPlants[i].getCurrentMoisturePCT() << "%" <<  endl;
         break;
       }
+      case SHT20:{
+        Serial << "Plant " << i << " measurement: " << mPlants[i].getCurrentTemperature() << "°C " << mPlants[i].getCurrentMoisturePCT() << "rH%" <<  endl;
+        break;
+      }
+
       case NONE : {
 
       }
     }
   }
 
-  waterRawSensor.clear();
+  //do not assume valid i2c state, force release of hardware
-  Wire.setPins(SENSOR_TANK_TRG, SENSOR_TANK_ECHO);
+  Wire = TwoWire(0);
+  Wire.setPins(SENSOR_TANK_SDA, SHARED_SCL);
   Wire.begin();
+
+  waterRawSensor.clear();
   tankSensor.setTimeout(500);
   long start = millis();
   bool distanceReady = false;
@@ -761,13 +768,17 @@ void safeSetup()
   Homie.setLoopFunction(homieLoop);
   Homie.onEvent(onHomieEvent);
 
-  Homie.setup();
-
   /* Intialize Plant */
   for (int i = 0; i < MAX_PLANTS; i++)
   {
     mPlants[i].initSensors();
   }
+  readPowerSwitchedSensors();
+
+
+  Homie.setup();
+
+
 
  /************************* Start One-Wire bus ***************/
   int tempInitStartTime = millis();
@@ -794,14 +805,13 @@ void safeSetup()
   mConfigured = Homie.isConfigured();
   if (mConfigured)
   {
-    Serial << "Reading sensors start" << endl;
-    Serial.flush();
-    readPowerSwitchedSensors();
-    Serial << "Reading sensors end" << endl;
-    Serial.flush();
     for (int i = 0; i < MAX_PLANTS; i++)
     {
       mPlants[i].advertise();
+      //write to temperature node instead
+      if(!equalish(mPlants[i].getCurrentTemperature(),PLANT_WITHOUT_TEMPSENSOR)){
+        mqttWrite(&sensorTemp, "Plant" + String(i), String(mPlants[i].getCurrentTemperature()));
+      }
     }
     mPlants[0].setSwitchHandler(switch1);
     mPlants[1].setSwitchHandler(switch2);