SGP30 driver for ESP32

A driver for the Sensirion SGP30 Indoor Air Quality sensor Datasheet

Example application

#include <freertos/FreeRTOS.h>

#include "sgp30.h"

static const char *TAG = "app_main";

static void measure(sgp30_handle_t *hdl) {
  ESP_LOGI(TAG, "Initialize device");
  ESP_ERROR_CHECK(sgp30_iaq_init(hdl));

  ESP_LOGI(TAG, "The first 15s worth of data is always the same");

  TickType_t prev_wake_time = xTaskGetTickCount();
  while (1) {
    uint16_t co2;
    uint16_t tvoc;

    xTaskDelayUntil(&prev_wake_time, pdMS_TO_TICKS(1000));

    ESP_ERROR_CHECK(sgp30_measure_iaq(hdl, &co2, &tvoc));
    ESP_LOGI(TAG, "CO2: %dppm, TVOC: %dppb", co2, tvoc);
  }
}

void app_main(void) {

  i2c_master_bus_config_t i2c_mst_config = {
      .clk_source = I2C_CLK_SRC_DEFAULT,
      .i2c_port = I2C_NUM_0,
      .scl_io_num = 4,
      .sda_io_num = 5,
      .glitch_ignore_cnt = 7,
      .flags.enable_internal_pullup = true,
  };

  i2c_master_bus_handle_t i2c_hdl;
  ESP_ERROR_CHECK(i2c_new_master_bus(&i2c_mst_config, &i2c_hdl));
  ESP_ERROR_CHECK(i2c_master_bus_reset(i2c_hdl));

  sgp30_handle_t *hdl;

  ESP_ERROR_CHECK(sgp30_new(&hdl, i2c_hdl));
  vTaskDelay(pdMS_TO_TICKS(1000));

  // measure_test(hdl);
  measure(hdl);
}