PlantCtrl/esp32/src/PlantCtrl.cpp

/**
 * @file PlantCtrl.cpp
 * @author your name (you@domain.com)
 * @brief 
 * @version 0.1
 * @date 2020-05-27
 * 
 * @copyright Copyright (c) 2020
 * 

 */

#include "PlantCtrl.h"
#include "ControllerConfiguration.h"
#include "TimeUtils.h"
#include "MathUtils.h"
#include "driver/pcnt.h" 

double mapf(double x, double in_min, double in_max, double out_min, double out_max)
{
    return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}

Plant::Plant(int pinSensor, int pinPump, int plantId, HomieNode *plant, PlantSettings_t *setting)
{
    this->mPinSensor = pinSensor;
    this->mPinPump = pinPump;
    this->mPlant = plant;
    this->mSetting = setting;
    this->mPlantId = plantId;
}

void Plant::init(void)
{
    /* Initialize Home Settings validator */
    this->mSetting->pSensorDry->setDefaultValue(DEACTIVATED_PLANT);
    this->mSetting->pSensorDry->setValidator([](double candidate) {
        return (((candidate >= 0.0) && (candidate <= 100.0)) || equalish(candidate,DEACTIVATED_PLANT));
    });
    this->mSetting->pPumpAllowedHourRangeStart->setDefaultValue(8); // start at 8:00
    this->mSetting->pPumpAllowedHourRangeStart->setValidator([](long candidate) {
        return ((candidate >= 0) && (candidate <= 23));
    });
    this->mSetting->pPumpAllowedHourRangeEnd->setDefaultValue(20); // stop pumps at 20:00
    this->mSetting->pPumpAllowedHourRangeEnd->setValidator([](long candidate) {
        return ((candidate >= 0) && (candidate <= 23));
    });
    this->mSetting->pPumpOnlyWhenLowLight->setDefaultValue(true);
    this->mSetting->pPumpCooldownInHours->setDefaultValue(20); // minutes
    this->mSetting->pPumpCooldownInHours->setValidator([](long candidate) {
        return ((candidate >= 0) && (candidate <= 1024));
    });

    /* Initialize Hardware */
    Serial.println("Set GPIO mode " + String(mPinPump) + "=" + String(OUTPUT));
    Serial.flush();
    pinMode(this->mPinPump, OUTPUT);
    Serial.println("Set GPIO mode " + String(mPinSensor) + "=" + String(ANALOG));
    Serial.flush();
    pinMode(this->mPinSensor, INPUT);
    Serial.println("Set GPIO " + String(mPinPump) + "=" + String(LOW));
    Serial.flush();
    digitalWrite(this->mPinPump, LOW);
    pcnt_unit_t unit = (pcnt_unit_t) (PCNT_UNIT_0 + this->mPlantId);
    pcnt_config_t pcnt_config = { };                                        // Instancia PCNT config

    pcnt_config.pulse_gpio_num = this->mPinSensor;                         // Configura GPIO para entrada dos pulsos
    pcnt_config.ctrl_gpio_num = PCNT_PIN_NOT_USED;                         // Configura GPIO para controle da contagem
    pcnt_config.unit = unit;      // Unidade de contagem PCNT - 0
    pcnt_config.channel = PCNT_CHANNEL_0;                               // Canal de contagem PCNT - 0
    pcnt_config.counter_h_lim = INT16_MAX;                             // Limite maximo de contagem - 20000
    pcnt_config.pos_mode = PCNT_COUNT_INC;                                  // Incrementa contagem na subida do pulso
    pcnt_config.neg_mode = PCNT_COUNT_DIS;                                  // Incrementa contagem na descida do pulso
    pcnt_config.lctrl_mode = PCNT_MODE_KEEP;                             // PCNT - modo lctrl desabilitado
    pcnt_config.hctrl_mode = PCNT_MODE_KEEP;                                // PCNT - modo hctrl - se HIGH conta incrementando
    pcnt_unit_config(&pcnt_config);                                         // Configura o contador PCNT


    pcnt_counter_pause(unit);    // Pausa o contador PCNT
    pcnt_counter_clear(unit);    // Zera o contador PCNT

    Serial.println("Setup Counter " + String(mPinPump) + "=" + String(LOW));
}

void Plant::startMoistureMeasurement(void) {
    pcnt_unit_t unit = (pcnt_unit_t) (PCNT_UNIT_0 + this->mPlantId);
    pcnt_counter_resume(unit);
}

void Plant::stopMoistureMeasurement(void) {
    int16_t pulses;
    pcnt_unit_t unit = (pcnt_unit_t) (PCNT_UNIT_0 + this->mPlantId);
    pcnt_counter_pause(unit); 
    pcnt_get_counter_value(unit, &pulses);
    pcnt_counter_clear(unit);
    
    this->mMoisture_freq = pulses * (1000 / MOISTURE_MEASUREMENT_DURATION);
}

void Plant::postMQTTconnection(void)
{
    const String OFF = String("OFF");
    this->mConnected = true;
    this->mPlant->setProperty("switch").send(OFF);

    long raw = getCurrentMoisture();
    double pct = mapf(raw, MOIST_SENSOR_MIN_FRQ, MOIST_SENSOR_MAX_FRQ, 100, 0);
    if (equalish(raw, MISSING_SENSOR))
    {
      pct = 0;
    }
    if (pct < 0)
    {
      pct = 0;
    }
    if (pct > 100)
    {
      pct = 100;
    }

    this->mPlant->setProperty("moist").send(String(round(pct*10)/10));
    this->mPlant->setProperty("moistraw").send(String(raw));
    this->mPlant->setProperty("moisttrigger").send(String(getSetting2Moisture()));
}

void Plant::deactivatePump(void)
{
    int plantId = this->mPlantId;
    Serial << "deactivating pump " << plantId << endl;
    digitalWrite(this->mPinPump, LOW);
    if (this->mConnected)
    {
        const String OFF = String("OFF");
        this->mPlant->setProperty("switch").send(OFF);
    }
}

void Plant::publishState(String state) {
    if (this->mConnected)
    {
        this->mPlant->setProperty("state").send(state);
    }
}

void Plant::activatePump(void)
{
    int plantId = this->mPlantId;
    Serial << "activating pump " << plantId << endl;
    digitalWrite(this->mPinPump, HIGH);
    if (this->mConnected)
    {
        const String OFF = String("ON");
        this->mPlant->setProperty("switch").send(OFF);
        this->mPlant->setProperty("lastPump").send(String(getCurrentTime()));
    }
}

bool Plant::switchHandler(const HomieRange& range, const String& value) {
    if (range.isRange) {
         return false;  // only one switch is present
    }

    if ((value.equals("ON")) || (value.equals("On")) || (value.equals("on")) || (value.equals("true"))) {
        this->activatePump();
        return true;
    } else if ((value.equals("OFF")) || (value.equals("Off")) || (value.equals("off")) || (value.equals("false")) ) {
        this->deactivatePump();
        return true;
    } else {
        return false;
    }
}

void Plant::setSwitchHandler(HomieInternals::PropertyInputHandler f) {
    this->mPump.settable(f);
}

void Plant::advertise(void)
{
    // Advertise topics
    mPump = this->mPlant->advertise("switch").setName("Pump").setDatatype("boolean");    
    this->mPlant->advertise("lastPump").setName("lastPump").setDatatype("Number").setUnit("unixtime");
    this->mPlant->advertise("moist").setName("Percent").setDatatype("Number").setUnit("%");
    this->mPlant->advertise("moistraw").setName("adc").setDatatype("Number").setUnit("3.3/4096V");
    this->mPlant->advertise("state").setName("state").setDatatype("string");
}