BOSCH BSEC integration

include/bme680.h

@@ -1,15 +0,0 @@
-#ifndef _BME680_H
-#define _BME680_H
-
-#include "globals.h"
-#include <Wire.h>
-#include <Adafruit_Sensor.h>
-#include "Adafruit_BME680.h"
-
-extern bmeStatus_t
-    bme_status; // Make struct for storing gps data globally available
-
-void bme_init();
-bool bme_read();
-
-#endif

include/bme680mems.h

@@ -0,0 +1,23 @@
+#ifndef _BME680MEMS_H
+#define _BME680MEMS_H
+
+#include "globals.h"
+#include <Wire.h>
+#include "bme680.h"
+#include "bsec_interface.h"
+#include "bsec_datatypes.h"
+//#include "bme680_defs.h"
+//#include "bme680.c"
+
+extern bmeStatus_t
+    bme_status; // Make struct for storing gps data globally available
+
+void bme_init();
+bool bme_read();
+void user_delay_ms(uint32_t period);
+int8_t user_i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data,
+                     uint16_t len);
+int8_t user_i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data,
+                      uint16_t len);
+
+#endif

include/globals.h

@@ -95,7 +95,7 @@ extern TaskHandle_t irqHandlerTask, wifiSwitchTask;
 #endif
 
 #ifdef HAS_BME
-#include "bme680.h"
+#include "bme680mems.h"
 #endif
 
 #ifdef HAS_LORA

platformio.ini

@@ -50,13 +50,9 @@ lib_deps_rgbled =
     SmartLeds@>=1.1.3
 lib_deps_gps =
     TinyGPSPlus@>=1.0.2
-lib_deps_sensors =
-    Adafruit Unified Sensor@^1.0.2
-    Adafruit BME680 Library@^1.0.7
 lib_deps_basic =
     ArduinoJson@^5.13.1
     Time@>=1.5
-    ${common.lib_deps_sensors}
 lib_deps_all = 
     ${common.lib_deps_basic}
     ${common.lib_deps_lora}
@@ -64,6 +60,8 @@ lib_deps_all =
     ${common.lib_deps_rgbled}
     ${common.lib_deps_gps}
 build_flags =
+    -Llib/Bosch-BSEC
+    -llibalgobsec.a
     -include src/hal/${PIOENV}.h
     -include src/paxcounter.conf
     -w

src/bme680.cpp

@@ -1,44 +0,0 @@
-#ifdef HAS_BME
-
-#include "bme680.h"
-
-// Local logging tag
-static const char TAG[] = "main";
-
-#define SEALEVELPRESSURE_HPA (1013.25)
-
-// I2C Bus interface
-Adafruit_BME680 bme;
-
-bmeStatus_t bme_status;
-
-void bme_init(void) {
-  // initialize BME680 sensor using default i2c address 0x77
-  if (bme.begin(HAS_BME)) {
-    // 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
-    ESP_LOGI(TAG, "BME680 chip found and initialized");
-  } else
-    ESP_LOGE(TAG, "BME680 chip not found on i2c bus");
-}
-
-bool bme_read(void) {
-  bool ret = bme.performReading();
-  if (ret) {
-    // read current BME data and buffer in global struct
-    bme_status.temperature = bme.temperature;
-    bme_status.pressure = (uint16_t)(bme.pressure / 100.0); // convert Pa -> hPa
-    bme_status.humidity = bme.humidity;
-    bme_status.gas_resistance = (uint16_t)(bme.gas_resistance / 1000.0); // convert Ohm -> kOhm
-    ESP_LOGI(TAG, "BME680 sensor data read success");
-  } else {
-    ESP_LOGI(TAG, "BME680 sensor read error");
-  }
-  return ret;
-}
-
-#endif // HAS_BME

src/bme680mems.cpp

@@ -0,0 +1,127 @@
+#ifdef HAS_BME
+
+#include "bme680mems.h"
+
+// Local logging tag
+static const char TAG[] = "main";
+
+bmeStatus_t bme_status;
+
+void bme_init(void) {
+
+  // initialize BME680 sensor
+
+  struct bme680_dev gas_sensor;
+
+  Wire.begin(HAS_BME, 400000); // I2C connect to BME680 sensor with 400 KHz
+
+  // configure sensor for I2C communication
+  gas_sensor.dev_id = BME_ADDR;
+  gas_sensor.intf = BME680_I2C_INTF;
+  gas_sensor.read = user_i2c_read;
+  gas_sensor.write = user_i2c_write;
+  gas_sensor.delay_ms = user_delay_ms;
+  gas_sensor.amb_temp = 25;
+
+  int8_t rslt = BME680_OK;
+  rslt = bme680_init(&gas_sensor);
+
+  if (rslt == BME680_OK) {
+    ESP_LOGI(TAG, "BME680 sensor found");
+  } else {
+    ESP_LOGE(TAG, "BME680 sensor not found on i2c bus");
+    return;
+  }
+
+  // configure BME680 sensor in forced mode
+
+  uint8_t set_required_settings;
+
+  /* Set the temperature, pressure and humidity settings */
+  gas_sensor.tph_sett.os_hum = BME680_OS_2X;
+  gas_sensor.tph_sett.os_pres = BME680_OS_4X;
+  gas_sensor.tph_sett.os_temp = BME680_OS_8X;
+  gas_sensor.tph_sett.filter = BME680_FILTER_SIZE_3;
+
+  /* Set the remaining gas sensor settings and link the heating profile */
+  gas_sensor.gas_sett.run_gas = BME680_ENABLE_GAS_MEAS;
+  /* Create a ramp heat waveform in 3 steps */
+  gas_sensor.gas_sett.heatr_temp = 320; /* degree Celsius */
+  gas_sensor.gas_sett.heatr_dur = 150;  /* milliseconds */
+
+  /* Select the power mode */
+  /* Must be set before writing the sensor configuration */
+  gas_sensor.power_mode = BME680_FORCED_MODE;
+
+  /* Set the required sensor settings needed */
+  set_required_settings = BME680_OST_SEL | BME680_OSP_SEL | BME680_OSH_SEL |
+                          BME680_FILTER_SEL | BME680_GAS_SENSOR_SEL;
+
+  /* Set the desired sensor configuration */
+  rslt = bme680_set_sensor_settings(set_required_settings, &gas_sensor);
+
+  /* Set the power mode */
+  rslt = bme680_set_sensor_mode(&gas_sensor);
+
+  if (rslt == BME680_OK) {
+    ESP_LOGI(TAG, "BME680 sensor initialized");
+  } else {
+    ESP_LOGE(TAG, "BME680 initialization failed");
+    return;
+  }
+}
+
+bool bme_read(void) {
+  /*
+
+    bool ret = bme.performReading();
+    if (ret) {
+      // read current BME data and buffer in global struct
+      bme_status.temperature = bme.temperature;
+      bme_status.pressure = (uint16_t)(bme.pressure / 100.0); // convert Pa ->
+    hPa bme_status.humidity = bme.humidity; bme_status.gas_resistance =
+    (uint16_t)(bme.gas_resistance / 1000.0); // convert Ohm -> kOhm
+      ESP_LOGI(TAG, "BME680 sensor data read success");
+    } else {
+      ESP_LOGI(TAG, "BME680 sensor read error");
+    }
+    return ret;
+
+  */
+}
+
+int8_t user_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 user_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;
+}
+
+void user_delay_ms(uint32_t period) { vTaskDelay(period / portTICK_PERIOD_MS); }
+
+#endif // HAS_BME

src/hal/generic.h

@@ -13,9 +13,16 @@
 #define SPI_SCLK GPIO_NUM_18
 #define SPI_CS   GPIO_NUM_5
 
+////////////// test //////////
 // enable only if device has these sensors, otherwise comment these lines
-#define HAS_BME 0x77  // BME680 sensor on I2C bus (default SDA=4/SCL=15); comment out if not present
+// BME680 sensor on I2C bus
-#define HAS_SENSORS 1 // comment out if device has user defined sensors
+#define HAS_BME GPIO_NUM_21, GPIO_NUM_22 // SDA, SCL
+// #define BME_ADDR BME680_I2C_ADDR_PRIMARY // i2c addr 0x76
+#define BME_ADDR BME680_I2C_ADDR_SECONDARY // i2c addr 0x77
+//
+// user defined sensors
+//#define HAS_SENSORS 1 // comment out if device has user defined sensors
+////////////// test //////////
 
 #define CFG_sx1276_radio 1 // select LoRa chip
 //#define CFG_sx1272_radio 1 // select LoRa chip

src/hal/ttgobeam.h

@@ -7,7 +7,12 @@
 
 ////////////// test //////////
 // enable only if device has these sensors, otherwise comment these lines
-#define HAS_BME 0x77  // BME680 sensor on I2C bus (default SDA=21/SCL=22); comment out if not present
+// BME680 sensor on I2C bus
+#define HAS_BME GPIO_NUM_21, GPIO_NUM_22 // SDA, SCL
+// #define BME_ADDR BME680_I2C_ADDR_PRIMARY // i2c addr 0x76
+#define BME_ADDR BME680_I2C_ADDR_SECONDARY // i2c addr 0x77
+//
+// user defined sensors
 //#define HAS_SENSORS 1 // comment out if device has user defined sensors
 ////////////// test //////////