HomeEnergyMeter/main/kWhCounter.c

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "driver/ledc.h"
#include "driver/pcnt.h"
#include "esp_attr.h"
#include "esp_log.h"

#include "mqtt.h"
#include "readTemps.h"
#include "kWhCounter.h"

uint32_t kWh_cnt = 0;   // No of seconds of active VBB

#ifdef ENABLE_KWH_COUNTER

void counterControlTask(void *pvParameters) {

    ESP_LOGI("kWhCounter", "counterControlTask starting. Core:%d",xPortGetCoreID());

    char txt[50];

    uint32_t secondCnt = 0;
    uint32_t activeCnt = 0;

    TickType_t vLastWakeTime = xTaskGetTickCount();
    const TickType_t xFreq = 100 / portTICK_PERIOD_MS;  // 100mS. 10 measurements / second

    while( 1 ) {

        for(uint8_t i=10; i>0; i-- ) {

            vTaskDelayUntil( &vLastWakeTime, xFreq );

            if( gpio_get_level(KWH_COUNTER_INPUT_IO) == 1 ) activeCnt++;
        }

        if( activeCnt > 0 ) kWh_cnt++;

        ESP_LOGI("kWhCounter", "1s Pin: %u  Tot:%u", activeCnt, kWh_cnt);

        if( ++secondCnt == 60 ) {
            // Every 60 seconds
            ESP_LOGI("kWhCounter", "60 sec. Measure. Pin: %u  Tot:%u", activeCnt, kWh_cnt);
            
            // Every 60 seconds we do a small 10 second pause to read out some temperature data
            // The OWB is sensitive to interrupts, so thats why we pause everything a little while

            sprintf(txt,"%u",kWh_cnt);
            sendMQTTMessage("basement/boiler/onTime", txt);
            vTaskDelayUntil( &vLastWakeTime, 5000 / portTICK_PERIOD_MS ); // Sleep 5s

            // Start temp measuring task
            xTaskCreatePinnedToCore(readAndSendTemps, "readAndSendTemps", 1024*10, NULL, 2, NULL,1);

            vTaskDelayUntil( &vLastWakeTime, 5000 / portTICK_PERIOD_MS ); // Sleep 5s

            if( activeCnt > 0 ) kWh_cnt += 10;  // Add 10 seconds for the seconds that we where sleeping, if active
            secondCnt = 10;
        }

        activeCnt = 0;
    }

}




void kWhCounter_init()
{
    ESP_LOGI("kWhCounter", "kWhCounter_init()");

    gpio_set_direction(KWH_COUNTER_INPUT_IO, GPIO_MODE_INPUT);

    xTaskCreatePinnedToCore(counterControlTask, "counterControlTask", 1024*10, NULL, 2, NULL,1);
}

#endif