Support for BME280

include/bme280.h

@@ -0,0 +1,17 @@
+#ifndef _BME280_H
+#define _BME280_H
+
+#include "globals.h"
+#include <Wire.h>
+#include <Adafruit_Sensor.h>
+#include <Adafruit_BME280.h>
+#include "../lib/Bosch-BSEC/src/bsec.h"
+
+extern bmeStatus_t
+    bme_status; // Make struct for storing gps data globally available
+extern TaskHandle_t Bme280Task;
+
+int bme280_init();
+void bme280_loop(void *pvParameters);
+
+#endif

include/cyclic.h

@@ -7,10 +7,14 @@
 #include "spislave.h"
 #include <lmic.h>
 
-#ifdef HAS_BME
+#ifdef HAS_BME680
 #include "bme680mems.h"
 #endif
 
+#ifdef HAS_BME280
+#include "bme280.h"
+#endif
+
 extern Ticker housekeeper;
 
 void housekeeping(void);

include/globals.h

@@ -151,8 +151,12 @@ extern time_t userUTCTime;
 #include "sensor.h"
 #endif
 
-#ifdef HAS_BME
+#ifdef HAS_BME680
 #include "bme680mems.h"
 #endif
 
+#ifdef HAS_BME280
+#include "bme280.h"
+#endif
+
 #endif

platformio.ini

@@ -6,7 +6,7 @@
 
 ; ---> SELECT TARGET PLATFORM HERE! <---
 [platformio]
-env_default = generic
+;env_default = generic
 ;env_default = ebox
 ;env_default = eboxtube
 ;env_default = heltec
@@ -14,7 +14,7 @@ env_default = generic
 ;env_default = ttgov1
 ;env_default = ttgov2
 ;env_default = ttgov21old
-;env_default = ttgov21new
+env_default = ttgov21new
 ;env_default = ttgobeam
 ;env_default = ttgofox
 ;env_default = lopy
@@ -202,7 +202,7 @@ lib_deps =
     ${common.lib_deps_lora}
     ${common.lib_deps_display}
 build_flags =
-    ${common.build_flags_basic}
+    ${common.build_flags_all}
 upload_protocol = ${common.upload_protocol}
 extra_scripts = ${common.extra_scripts}
 monitor_speed = ${common.monitor_speed}

src/bme280.cpp

@@ -0,0 +1,63 @@
+#ifdef HAS_BME280
+
+#include "bme280.h"
+
+// Local logging tag
+static const char TAG[] = __FILE__;
+
+bmeStatus_t bme_status;
+TaskHandle_t Bme280Task;
+
+#define SEALEVELPRESSURE_HPA (1013.25)
+
+Adafruit_BME280 bme; // I2C
+//Adafruit_BME280 bme(BME_CS); // hardware SPI
+//Adafruit_BME280 bme(BME_CS, BME_MOSI, BME_MISO, BME_SCK); // software SPI
+
+// initialize BME280 sensor
+int bme280_init(void) {
+
+  bool status;
+  // return = 0 -> error / return = 1 -> success
+
+  // block i2c bus access
+  if (I2C_MUTEX_LOCK()) {
+    status = bme.begin(BME280_ADDR);  
+    if (!status) {
+        ESP_LOGE(TAG, "BME280 sensor not found");
+        goto error;
+    }
+    ESP_LOGI(TAG, "BME280 sensor found and initialized");
+  } else {
+    ESP_LOGE(TAG, "I2c bus busy - BME280 initialization error");
+    goto error;
+  }
+
+  I2C_MUTEX_UNLOCK(); // release i2c bus access
+  return 1;
+
+error:
+  I2C_MUTEX_UNLOCK(); // release i2c bus access
+  return 0;
+
+} // bme_init()
+
+// loop function which reads and processes data based on sensor settings
+void bme280_loop(void *pvParameters) {
+#ifdef HAS_BME280
+  while (1) {
+    if (I2C_MUTEX_LOCK()) {
+      bme_status.temperature = bme.readTemperature();
+      bme_status.pressure = (bme.readPressure() / 100.0); // conversion Pa -> hPa
+      // bme.readAltitude(SEALEVELPRESSURE_HPA);
+      bme_status.humidity = bme.readHumidity();
+      I2C_MUTEX_UNLOCK();
+    }
+  }
+#endif
+  ESP_LOGE(TAG, "BME task ended");
+  vTaskDelete(Bme280Task); // should never be reached
+
+} // bme_loop()
+
+#endif // HAS_BME280

src/bme680mems.cpp

@@ -1,4 +1,4 @@
-#ifdef HAS_BME
+#ifdef HAS_BME680
 
 #include "bme680mems.h"
 
@@ -34,8 +34,8 @@ int bme_init(void) {
   // block i2c bus access
   if (I2C_MUTEX_LOCK()) {
 
-    Wire.begin(HAS_BME);
+    Wire.begin(HAS_BME680);
-    iaqSensor.begin(BME_ADDR, Wire);
+    iaqSensor.begin(BME680_ADDR, Wire);
 
     ESP_LOGI(TAG, "BSEC v%d.%d.%d.%d", iaqSensor.version.major,
              iaqSensor.version.minor, iaqSensor.version.major_bugfix,
@@ -103,7 +103,7 @@ void bme_loop(void *pvParameters) {
 
   configASSERT(((uint32_t)pvParameters) == 1); // FreeRTOS check
 
-#ifdef HAS_BME
+#ifdef HAS_BME680
   while (1) {
     // block i2c bus access
     if (I2C_MUTEX_LOCK()) {
@@ -168,4 +168,4 @@ void updateState(void) {
   }
 }
 
-#endif // HAS_BME
+#endif // HAS_BME680

src/cyclic.cpp

@@ -36,10 +36,14 @@ void doHousekeeping() {
   ESP_LOGD(TAG, "Gpsloop %d bytes left | Taskstate = %d",
            uxTaskGetStackHighWaterMark(GpsTask), eTaskGetState(GpsTask));
 #endif
-#ifdef HAS_BME
+#ifdef HAS_BME680
   ESP_LOGD(TAG, "Bmeloop %d bytes left | Taskstate = %d",
            uxTaskGetStackHighWaterMark(BmeTask), eTaskGetState(BmeTask));
 #endif
+#ifdef HAS_BME280
+  ESP_LOGD(TAG, "Bme280loop %d bytes left | Taskstate = %d",
+           uxTaskGetStackHighWaterMark(Bme280Task), eTaskGetState(Bme280Task));
+#endif
 #ifdef HAS_DCF77
   ESP_LOGD(TAG, "Clockloop %d bytes left | Taskstate = %d",
            uxTaskGetStackHighWaterMark(ClockTask), eTaskGetState(ClockTask));
@@ -58,11 +62,17 @@ void doHousekeeping() {
 #endif
 
 // display BME sensor data
-#ifdef HAS_BME
+#ifdef HAS_BME680
   ESP_LOGI(TAG, "BME680 Temp: %.2f°C | IAQ: %.2f | IAQacc: %d",
            bme_status.temperature, bme_status.iaq, bme_status.iaq_accuracy);
 #endif
 
+// display BME280 sensor data
+#ifdef HAS_BME280
+  ESP_LOGI(TAG, "BME680 Temp: %.2f°C | Humidity: %.2f | Pressure: %.0f",
+           bme_status.temperature, bme_status.humidity, bme_status.pressure);
+#endif
+
   // check free heap memory
   if (ESP.getMinFreeHeap() <= MEM_LOW) {
     ESP_LOGI(TAG,

src/hal/generic.h

@@ -18,8 +18,9 @@
 
 // enable only if device has these sensors, otherwise comment these lines
 // BME680 sensor on I2C bus
-#define HAS_BME GPIO_NUM_21, GPIO_NUM_22 // SDA, SCL
+#define HAS_BME 1 // Enable BME sensors in general
-#define BME_ADDR BME680_I2C_ADDR_PRIMARY // connect SDIO of BME680 to GND
+#define HAS_BME680 GPIO_NUM_21, GPIO_NUM_22 // SDA, SCL
+#define BME680_ADDR BME680_I2C_ADDR_PRIMARY // connect SDIO of BME680 to GND
 
 // user defined sensors
 //#define HAS_SENSORS 1 // comment out if device has user defined sensors

src/hal/heltec.h

@@ -7,8 +7,9 @@
 
 // Hardware related definitions for Heltec V2 LoRa-32 Board
 
-//#define HAS_BME GPIO_NUM_21, GPIO_NUM_22 // SDA, SCL
+//#define HAS_BME 1 // Enable BME sensors in general
-//#define BME_ADDR BME680_I2C_ADDR_PRIMARY // connect SDIO of BME680 to GND
+//#define HAS_BME680 GPIO_NUM_21, GPIO_NUM_22 // SDA, SCL
+//#define BME680_ADDR BME680_I2C_ADDR_PRIMARY // connect SDIO of BME680 to GND
 
 #define HAS_LORA 1 // comment out if device shall not send data via LoRa
 #define CFG_sx1276_radio 1

src/hal/heltecv2.h

@@ -7,8 +7,9 @@
 
 // Hardware related definitions for Heltec V2 LoRa-32 Board
 
-//#define HAS_BME GPIO_NUM_4, GPIO_NUM_15 // SDA, SCL
+//#define HAS_BME 1 // Enable BME sensors in general
-//#define BME_ADDR BME680_I2C_ADDR_PRIMARY // connect SDIO of BME680 to GND 
+//#define HAS_BME680 GPIO_NUM_4, GPIO_NUM_15 // SDA, SCL
+//#define BME680_ADDR BME680_I2C_ADDR_PRIMARY // connect SDIO of BME680 to GND 
 
 #define HAS_LORA 1       // comment out if device shall not send data via LoRa
 #define CFG_sx1276_radio 1

src/hal/octopus32.h

@@ -12,8 +12,9 @@
 #define DISABLE_BROWNOUT 1 // comment out if you want to keep brownout feature
 
 // Octopus32 has a pre-populated BME680 on i2c addr 0x76
-#define HAS_BME GPIO_NUM_23, GPIO_NUM_22 // SDA, SCL
+#define HAS_BME 1 // Enable BME sensors in general
-#define BME_ADDR BME680_I2C_ADDR_PRIMARY // connect SDIO of BME680 to GND
+#define HAS_BME680 GPIO_NUM_23, GPIO_NUM_22 // SDA, SCL
+#define BME680_ADDR BME680_I2C_ADDR_PRIMARY // connect SDIO of BME680 to GND
 
 // user defined sensors
 //#define HAS_SENSORS 1 // comment out if device has user defined sensors

src/hal/ttgobeam.h

@@ -31,8 +31,9 @@
 
 // enable only if device has these sensors, otherwise comment these lines
 // BME680 sensor on I2C bus
-#define HAS_BME SDA, SCL
+#define HAS_BME 1 // Enable BME sensors in general
-#define BME_ADDR BME680_I2C_ADDR_PRIMARY // !! connect SDIO of BME680 to GND !!
+#define HAS_BME680 SDA, SCL
+#define BME680_ADDR BME680_I2C_ADDR_PRIMARY // !! connect SDIO of BME680 to GND !!
 
 // display (if connected)
 #define HAS_DISPLAY U8X8_SSD1306_128X64_NONAME_HW_I2C

src/hal/ttgov21new.h

@@ -13,6 +13,12 @@
 #define HAS_LORA 1       // comment out if device shall not send data via LoRa
 #define CFG_sx1276_radio 1 // HPD13A LoRa SoC
 
+// enable only if device has these sensors, otherwise comment these lines
+// BME680 sensor on I2C bus
+#define HAS_BME 1 // Enable BME sensors in general
+#define HAS_BME280 GPIO_NUM_21, GPIO_NUM_22 // SDA, SCL
+#define BME280_ADDR BME680_I2C_ADDR_PRIMARY // connect SDIO of BME680 to GND
+
 #define HAS_DISPLAY U8X8_SSD1306_128X64_NONAME_HW_I2C
 #define HAS_LED (25) // green on board LED
 #define HAS_BATTERY_PROBE ADC1_GPIO35_CHANNEL // battery probe GPIO pin -> ADC1_CHANNEL_7

src/main.cpp

@@ -358,11 +358,11 @@ void setup() {
                           &irqHandlerTask, // task handle
                           1);              // CPU core
 
-// initialize bme
+// initialize bme680
-#ifdef HAS_BME
+#ifdef HAS_BME680
-  strcat_P(features, " BME");
+  strcat_P(features, " BME280");
   if (bme_init()) {
-    ESP_LOGI(TAG, "Starting BME sensor...");
+    ESP_LOGI(TAG, "Starting BME280 sensor...");
     xTaskCreatePinnedToCore(bme_loop,  // task function
                             "bmeloop", // name of task
                             2048,      // stack size of task
@@ -373,6 +373,21 @@ void setup() {
   }
 #endif
 
+// initialize BME280
+#ifdef HAS_BME280
+  strcat_P(features, " BME280");
+  if (bme280_init()) {
+    ESP_LOGI(TAG, "Starting BME280 sensor...");
+    xTaskCreatePinnedToCore(bme280_loop,  // task function
+                            "bme280loop", // name of task
+                            2048,      // stack size of task
+                            (void *)1, // parameter of the task
+                            1,         // priority of the task
+                            &Bme280Task,  // task handle
+                            1);        // CPU core
+  }
+#endif
+
   // starting timers and interrupts
   assert(irqHandlerTask != NULL); // has interrupt handler task started?
   ESP_LOGI(TAG, "Starting Timers...");

src/rcommand.cpp

@@ -262,7 +262,7 @@ void get_gps(uint8_t val[]) {
 
 void get_bme(uint8_t val[]) {
   ESP_LOGI(TAG, "Remote command: get bme680 sensor data");
-#ifdef HAS_BME
+#ifdef HAS_BME680
   payload.reset();
   payload.addBME(bme_status);
   SendPayload(BMEPORT, prio_high);