Mathieu Maret
2 years ago
12 changed files with 273 additions and 13 deletions
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#pragma once |
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#ifdef CONFIG_BME680_BSEC_ENABLE |
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int BME680BSECGetMeasure(float &t, float &p, float &h, float &iaq, float &iaqAcc); |
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int BME680BSECSetup(); |
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bool BME680BSECIsConnected(); |
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#else // CONFIG_ENABLE_BME680_BSEC
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#define BSEC_MAX_STATE_BLOB_SIZE 0 |
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int BME680BSECGetMeasure(float &, float &, float &, float &, float &) { |
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return -1; |
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}; |
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int BME680BSECSetup() { |
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SKETCH_DEBUG_PRINTLN("BME680 BSEC is disabled at build time"); |
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return -1; |
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}; |
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bool BME680BSECIsConnected() { return false; }; |
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#endif |
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#ifdef CONFIG_BME680_BSEC_ENABLE |
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#include "BME680_BSEC.h" |
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#include "bsec.h" |
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/* Configure the BSEC library with information about the sensor
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18v/33v = Voltage at Vdd. 1.8V or 3.3V |
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3s/300s = BSEC operating mode, BSEC_SAMPLE_RATE_LP or BSEC_SAMPLE_RATE_ULP |
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4d/28d = Operating age of the sensor in days |
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generic_18v_3s_4d |
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generic_18v_3s_28d |
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generic_18v_300s_4d |
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generic_18v_300s_28d |
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generic_33v_3s_4d |
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generic_33v_3s_28d |
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generic_33v_300s_4d |
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generic_33v_300s_28d |
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*/ |
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const uint8_t bsec_config_iaq[] = { |
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#if CONFIG_SAMPLING_PERIODE_MS == 3000 |
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#include "config/generic_33v_3s_4d/bsec_iaq.txt" |
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#elif CONFIG_SAMPLING_PERIODE_MS == 300000 |
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#include "config/generic_33v_300s_4d/bsec_iaq.txt" |
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#else |
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#error "Unsupport CONFIG_SAMPLING_PERIODE_MS (3000 and 300000 are supported)" |
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#endif |
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}; |
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#define STATE_SAVE_PERIOD \ |
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UINT32_C(360 * 60 * 1000) // 360 minutes - 4 times a day
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uint16_t stateUpdateCounter = 0; |
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Bsec iaqSensor; |
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uint8_t bsecState[BSEC_MAX_STATE_BLOB_SIZE] = {0}; |
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// Helper function definitions
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int checkIaqSensorStatus(void) { |
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if (iaqSensor.status != BSEC_OK) { |
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if (iaqSensor.status < BSEC_OK) { |
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SKETCH_DEBUG_PRINTLN("BSEC error code : " + String(iaqSensor.status)); |
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return -2; |
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} else { |
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SKETCH_DEBUG_PRINTLN("BSEC warning code : " + String(iaqSensor.status)); |
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return -1; |
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} |
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} |
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if (iaqSensor.bme680Status != BME680_OK) { |
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if (iaqSensor.bme680Status < BME680_OK) { |
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SKETCH_DEBUG_PRINTLN("BME680 error code : " + String(iaqSensor.bme680Status)); |
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return -2; |
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} else { |
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SKETCH_DEBUG_PRINTLN("BME680 warning code : " + String(iaqSensor.bme680Status)); |
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return -1; |
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} |
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} |
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iaqSensor.status = BSEC_OK; |
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return 0; |
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} |
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void updateState(void) |
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{ |
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bool update = false; |
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/* Set a trigger to save the state. Here, the state is saved every STATE_SAVE_PERIOD with the
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* first state being saved once the algorithm achieves full calibration, i.e. iaqAccuracy = 3 |
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*/ |
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if (stateUpdateCounter == 0) { |
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if (iaqSensor.iaqAccuracy >= 3) { |
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update = true; |
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stateUpdateCounter++; |
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} |
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} else { |
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/* Update every STATE_SAVE_PERIOD milliseconds */ |
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if ((stateUpdateCounter * STATE_SAVE_PERIOD) < millis()) { |
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update = true; |
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stateUpdateCounter++; |
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} |
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} |
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if (update) { |
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iaqSensor.getState(bsecState); |
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checkIaqSensorStatus(); |
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SKETCH_DEBUG_PRINTLN("Writing state to EEPROM"); |
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EepromSaveBME680State(bsecState); |
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} |
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} |
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int BME680BSECGetMeasure(float &t, float &p, float &h, float &iaq, float &iaqAcc) |
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{ |
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if (iaqSensor.run()) { // If new data is available
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t = iaqSensor.temperature; |
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p = iaqSensor.pressure; |
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h = iaqSensor.humidity; |
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iaq = iaqSensor.iaq; |
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iaqAcc = iaqSensor.iaqAccuracy; |
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updateState(); |
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} else { |
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return -1; |
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} |
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return 0; |
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} |
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int BME680BSECSetup() |
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{ |
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Wire.begin(); |
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iaqSensor.begin(CONFIG_BME680_BSEC_I2C_ADDR, Wire); |
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SKETCH_DEBUG_PRINTLN("\nBSEC library version " + String(iaqSensor.version.major) + "." + |
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String(iaqSensor.version.minor) + "." + String(iaqSensor.version.major_bugfix) + |
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"." + String(iaqSensor.version.minor_bugfix)); |
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if (checkIaqSensorStatus()) |
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return -1; |
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iaqSensor.setConfig(bsec_config_iaq); |
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if (checkIaqSensorStatus()) |
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return -1; |
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if (!EepromLoadBME680State(bsecState)) |
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iaqSensor.setState(bsecState); |
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if (checkIaqSensorStatus()) |
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return -1; |
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bsec_virtual_sensor_t sensorList[7] = { |
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BSEC_OUTPUT_RAW_TEMPERATURE, |
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BSEC_OUTPUT_RAW_PRESSURE, |
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BSEC_OUTPUT_RAW_HUMIDITY, |
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BSEC_OUTPUT_RAW_GAS, |
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BSEC_OUTPUT_IAQ, |
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BSEC_OUTPUT_SENSOR_HEAT_COMPENSATED_TEMPERATURE, |
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BSEC_OUTPUT_SENSOR_HEAT_COMPENSATED_HUMIDITY, |
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}; |
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iaqSensor.updateSubscription(sensorList, 7, BSEC_SAMPLE_RATE_LP); |
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if (checkIaqSensorStatus()) |
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return -1; |
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return 0; |
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} |
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bool BME680BSECIsConnected() |
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{ |
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if (checkIaqSensorStatus()) |
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return false; |
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return true; |
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} |
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#endif |
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