Added support for Bosch BMP180 sensor

src/bmesensor.cpp

@@ -36,6 +36,10 @@ Adafruit_BME280 bme; // I2C
                      // Adafruit_BME280 bme(BME_CS); // hardware SPI
 // Adafruit_BME280 bme(BME_CS, BME_MOSI, BME_MISO, BME_SCK); // software SPI
 
+#elif defined HAS_BMP180
+
+Adafruit_BMP085 bmp; // I2C
+
 #endif
 
 void bmecycle() { xTaskNotify(irqHandlerTask, BME_IRQ, eSetBits); }
@@ -105,8 +109,26 @@ int bme_init(void) {
     goto finish;
   }
 
+#elif defined HAS_BMP180
+  bool status;
+  // block i2c bus access
+  if (I2C_MUTEX_LOCK()) {
+    // Wire.begin(21, 22);
+    status = bmp.begin();
+    if (!status) {
+      ESP_LOGE(TAG, "BMP180 sensor not found");
+      rc = 0;
+      goto finish;
+    }
+    ESP_LOGI(TAG, "BMP180 sensor found and initialized");
+  } else {
+    ESP_LOGE(TAG, "I2c bus busy - BMP180 initialization error");
+    rc = 0;
+    goto finish;
+  }
 #endif
 
+
 finish:
   I2C_MUTEX_UNLOCK(); // release i2c bus access
   if (rc)
@@ -168,6 +190,12 @@ void bme_storedata(bmeStatus_t *bme_store) {
     // bme.readAltitude(SEALEVELPRESSURE_HPA);
     bme_store->humidity = bme.readHumidity();
     bme_store->iaq = 0; // IAQ feature not present with BME280
+#elif defined HAS_BMP180
+    bme_store->temperature = bmp.readTemperature();
+    bme_store->pressure = (bmp.readPressure() / 100.0); // conversion Pa -> hPa
+    // bme.readAltitude(SEALEVELPRESSURE_HPA);
+    // bme_store->humidity = bme.readHumidity();
+    bme_store->iaq = 0; // IAQ feature not present with BME280
 #endif
 
     I2C_MUTEX_UNLOCK(); // release i2c bus access

src/cyclic.cpp

@@ -81,6 +81,9 @@ void doHousekeeping() {
 #elif defined HAS_BME280
   ESP_LOGI(TAG, "BME280 Temp: %.2f°C | Humidity: %.2f | Pressure: %.0f",
            bme_status.temperature, bme_status.humidity, bme_status.pressure);
+#elif defined HAS_BMP180
+  ESP_LOGI(TAG, "BMP180 Temp: %.2f°C | Pressure: %.0f",
+           bme_status.temperature, bme_status.pressure);
 #endif
 #endif
 

src/hal/generic.h

@@ -36,6 +36,10 @@
 //#define HAS_BME280 GPIO_NUM_21, GPIO_NUM_22 // SDA, SCL
 //#define BME280_ADDR 0x76 // change to 0x77 depending on your wiring
 
+// BMP180 sensor on I2C bus
+//#define HAS_BMP180
+//#define BMP180_ADDR 0x77
+
 // user defined sensors
 //#define HAS_SENSORS 1 // comment out if device has user defined sensors
 

src/hal/heltecv2.h

@@ -12,6 +12,8 @@
 //#define HAS_BME 1 // Enable BME sensors in general
 //#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_BMP180
+//#define BMP180_ADDR 0x77
 
 #define HAS_LORA 1       // comment out if device shall not send data via LoRa
 #define CFG_sx1276_radio 1

src/main.cpp

@@ -390,6 +390,8 @@ void setup() {
   strcat_P(features, " BME680");
 #elif defined HAS_BME280
   strcat_P(features, " BME280");
+#elif defined HAS_BMP180
+  strcat_P(features, " BMP180");
 #endif
   if (bme_init())
     ESP_LOGI(TAG, "Starting BME sensor...");