#ifdef HAS_BME #include "bme680mems.h" // Local logging tag static const char TAG[] = "main"; bmeStatus_t bme_status; TaskHandle_t BmeTask; float bme_offset = (float) BME_TEMP_OFFSET; // --- Bosch BSEC library configuration --- // 3,3V supply voltage; 3s max time between sensor_control calls; 4 days // calibration. Change this const if not applicable for your application (see // BME680 datasheet) const uint8_t bsec_config_iaq[454] = { 1, 7, 4, 1, 61, 0, 0, 0, 0, 0, 0, 0, 174, 1, 0, 0, 48, 0, 1, 0, 137, 65, 0, 63, 205, 204, 204, 62, 0, 0, 64, 63, 205, 204, 204, 62, 0, 0, 225, 68, 0, 192, 168, 71, 64, 49, 119, 76, 0, 0, 0, 0, 0, 80, 5, 95, 0, 0, 0, 0, 0, 0, 0, 0, 28, 0, 2, 0, 0, 244, 1, 225, 0, 25, 0, 0, 128, 64, 0, 0, 32, 65, 144, 1, 0, 0, 112, 65, 0, 0, 0, 63, 16, 0, 3, 0, 10, 215, 163, 60, 10, 215, 35, 59, 10, 215, 35, 59, 9, 0, 5, 0, 0, 0, 0, 0, 1, 88, 0, 9, 0, 229, 208, 34, 62, 0, 0, 0, 0, 0, 0, 0, 0, 218, 27, 156, 62, 225, 11, 67, 64, 0, 0, 160, 64, 0, 0, 0, 0, 0, 0, 0, 0, 94, 75, 72, 189, 93, 254, 159, 64, 66, 62, 160, 191, 0, 0, 0, 0, 0, 0, 0, 0, 33, 31, 180, 190, 138, 176, 97, 64, 65, 241, 99, 190, 0, 0, 0, 0, 0, 0, 0, 0, 167, 121, 71, 61, 165, 189, 41, 192, 184, 30, 189, 64, 12, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 229, 0, 254, 0, 2, 1, 5, 48, 117, 100, 0, 44, 1, 112, 23, 151, 7, 132, 3, 197, 0, 92, 4, 144, 1, 64, 1, 64, 1, 144, 1, 48, 117, 48, 117, 48, 117, 48, 117, 100, 0, 100, 0, 100, 0, 48, 117, 48, 117, 48, 117, 100, 0, 100, 0, 48, 117, 48, 117, 100, 0, 100, 0, 100, 0, 100, 0, 48, 117, 48, 117, 48, 117, 100, 0, 100, 0, 100, 0, 48, 117, 48, 117, 100, 0, 100, 0, 44, 1, 44, 1, 44, 1, 44, 1, 44, 1, 44, 1, 44, 1, 44, 1, 44, 1, 44, 1, 44, 1, 44, 1, 44, 1, 44, 1, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 8, 7, 112, 23, 112, 23, 112, 23, 112, 23, 112, 23, 112, 23, 112, 23, 112, 23, 112, 23, 112, 23, 112, 23, 112, 23, 112, 23, 112, 23, 255, 255, 255, 255, 255, 255, 255, 255, 220, 5, 220, 5, 220, 5, 255, 255, 255, 255, 255, 255, 220, 5, 220, 5, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 44, 1, 0, 0, 0, 0, 239, 79, 0, 0}; // initialize BME680 sensor int bme_init(void) { // struct bme680_dev gas_sensor; Wire.begin(HAS_BME, 400000); // I2C connect to BME680 sensor with 400 KHz // Call to the function which initializes the BSEC library // Switch on low-power mode and provide no temperature offset return_values_init ret = bsec_iot_init(BSEC_SAMPLE_RATE_LP, bme_offset, i2c_write, i2c_read, user_delay_ms, state_load, config_load); if ((int)ret.bme680_status) { ESP_LOGE(TAG, "Could not initialize BME680, error %d", (int)ret.bme680_status); } else if ((int)ret.bsec_status) { ESP_LOGE(TAG, "Could not initialize BSEC library, error %d", (int)ret.bsec_status); } else { ESP_LOGI(TAG, "BME680 sensor found and initialized"); return 1; } return 0; } void output_ready(int64_t timestamp, float iaq, uint8_t iaq_accuracy, float temperature, float humidity, float pressure, float raw_temperature, float raw_humidity, float gas, bsec_library_return_t bsec_status, float static_iaq, float co2_equivalent, float breath_voc_equivalent) { bme_status.temperature = temperature; bme_status.humidity = humidity; bme_status.pressure = (pressure / 100.0); // conversion Pa -> hPa bme_status.iaq = iaq; } // loop function which reads and processes data based on sensor settings void bme_loop(void *pvParameters) { configASSERT(((uint32_t)pvParameters) == 1); // FreeRTOS check #ifdef HAS_BME // State is saved every 10.000 samples, which means every 10.000 * 3 secs = // 500 minutes bsec_iot_loop(user_delay_ms, get_timestamp_us, output_ready, state_save, 10000); #endif vTaskDelete(BmeTask); // should never be reached } // bme_loop() int8_t i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len) { int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */ uint16_t i; Wire.beginTransmission(dev_id); Wire.write(reg_addr); rslt = Wire.endTransmission(); Wire.requestFrom((int)dev_id, (int)len); for (i = 0; (i < len) && Wire.available(); i++) { reg_data[i] = Wire.read(); } return rslt; } int8_t i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len) { int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */ uint16_t i; Wire.beginTransmission(dev_id); Wire.write(reg_addr); for (i = 0; i < len; i++) { Wire.write(reg_data[i]); } rslt = Wire.endTransmission(); return rslt; } /*! * @brief Load previous library state from non-volatile memory * * @param[in,out] state_buffer buffer to hold the loaded state string * @param[in] n_buffer size of the allocated state buffer * * @return number of bytes copied to state_buffer */ uint32_t state_load(uint8_t *state_buffer, uint32_t n_buffer) { // ... // Load a previous library state from non-volatile memory, if available. // // Return zero if loading was unsuccessful or no state was available, // otherwise return length of loaded state string. // ... return 0; } /*! * @brief Save library state to non-volatile memory * * @param[in] state_buffer buffer holding the state to be stored * @param[in] length length of the state string to be stored * * @return none */ void state_save(const uint8_t *state_buffer, uint32_t length) { // ... // Save the string some form of non-volatile memory, if possible. // ... } uint32_t config_load(uint8_t *config_buffer, uint32_t n_buffer) { // Load a library config from non-volatile memory, if available. // Return zero if loading was unsuccessful or no config was available, // otherwise return length of loaded config string. memcpy(config_buffer, bsec_config_iaq, sizeof(bsec_config_iaq)); return sizeof(bsec_config_iaq); } void user_delay_ms(uint32_t period) { vTaskDelay(period / portTICK_PERIOD_MS); } int64_t get_timestamp_us() { return (int64_t)millis() * 1000; } #endif // HAS_BME