65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
|
#ifdef HAS_BME
|
||
|
|
|
||
|
|
#include "globals.h"
|
||
|
|
|
||
|
|
// Local logging tag
|
||
|
|
static const char TAG[] = "main";
|
||
|
|
|
||
|
|
#include <Wire.h>
|
||
|
|
#include <SPI.h>
|
||
|
|
#include <Adafruit_Sensor.h>
|
||
|
|
#include "Adafruit_BME680.h"
|
||
|
|
|
||
|
|
#define SEALEVELPRESSURE_HPA (1013.25)
|
||
|
|
|
||
|
|
// I2C Bus interface
|
||
|
|
Adafruit_BME680 bme;
|
||
|
|
|
||
|
|
bmeStatus_t bme_status;
|
||
|
|
TaskHandle_t BmeTask;
|
||
|
|
|
||
|
|
// BME680 read loop Task
|
||
|
|
void bme_loop(void *pvParameters) {
|
||
|
|
|
||
|
|
configASSERT(((uint32_t)pvParameters) == 1); // FreeRTOS check
|
||
|
|
|
||
|
|
// initialize BME680 sensor
|
||
|
|
if (!bme.begin()) {
|
||
|
|
ESP_LOGE(TAG, "BME680 chip not found on i2c bus, bus error %d. "
|
||
|
|
"Stopping BME task.");
|
||
|
|
vTaskDelete(BmeTask);
|
||
|
|
} else {
|
||
|
|
ESP_LOGI(TAG, "BME680 chip found.");
|
||
|
|
}
|
||
|
|
|
||
|
|
// Set up oversampling and filter initialization
|
||
|
|
bme.setTemperatureOversampling(BME680_OS_8X);
|
||
|
|
bme.setHumidityOversampling(BME680_OS_2X);
|
||
|
|
bme.setPressureOversampling(BME680_OS_4X);
|
||
|
|
bme.setIIRFilterSize(BME680_FILTER_SIZE_3);
|
||
|
|
bme.setGasHeater(320, 150); // 320*C for 150 ms
|
||
|
|
|
||
|
|
// read loop
|
||
|
|
while (1) {
|
||
|
|
|
||
|
|
vTaskDelay(10000 / portTICK_PERIOD_MS);
|
||
|
|
|
||
|
|
if (!bme.performReading()) {
|
||
|
|
ESP_LOGE(TAG, "BME680 read error");
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// read BME data and cast to global struct
|
||
|
|
bme_status.temperature = (uint16_t)bme.temperature;
|
||
|
|
bme_status.pressure = (uint16_t)(bme.pressure / 100.0);
|
||
|
|
bme_status.humidity = (uint16_t)bme.humidity;
|
||
|
|
bme_status.gas_resistance = (uint16_t)(bme.gas_resistance / 1000.0);
|
||
|
|
bme_status.altitude = (uint16_t)bme.readAltitude(SEALEVELPRESSURE_HPA);
|
||
|
|
|
||
|
|
} // end of infinite loop
|
||
|
|
|
||
|
|
vTaskDelete(NULL); // shoud never be reached
|
||
|
|
|
||
|
|
} // bme_loop()
|
||
|
|
|
||
|
|
#endif // HAS_BME
|