From ac1513129627e505544264b8ff46282a4a46f3c1 Mon Sep 17 00:00:00 2001
From: Wesley Ellis <tahnok@gmail.com>
Date: Wed, 22 Oct 2025 16:17:06 -0400
Subject: [PATCH 1/2] Add support for bmp085/bmp180 temperature/pressure sensor

---
 platformio.ini                                |  2 ++
 .../sensors/EnvironmentSensorManager.cpp      | 29 +++++++++++++++++++
 .../sensors/EnvironmentSensorManager.h        |  1 +
 3 files changed, 32 insertions(+)

diff --git a/platformio.ini b/platformio.ini
index 1200f5998..56a517197 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -128,6 +128,7 @@ build_flags =
   -D ENV_INCLUDE_MLX90614=1
   -D ENV_INCLUDE_VL53L0X=1
   -D ENV_INCLUDE_BME680=1
+  -D ENV_INCLUDE_BMP085=1
 lib_deps =
   adafruit/Adafruit INA3221 Library @ ^1.0.1
   adafruit/Adafruit INA219 @ ^1.2.3
@@ -143,3 +144,4 @@ lib_deps =
   adafruit/Adafruit_VL53L0X @ ^1.2.4
   stevemarple/MicroNMEA @ ^2.0.6
   adafruit/Adafruit BME680 Library @ ^2.0.4
+  adafruit/Adafruit BMP085 Library @ ^1.2.4
diff --git a/src/helpers/sensors/EnvironmentSensorManager.cpp b/src/helpers/sensors/EnvironmentSensorManager.cpp
index bb70c0b5c..41d50e92c 100644
--- a/src/helpers/sensors/EnvironmentSensorManager.cpp
+++ b/src/helpers/sensors/EnvironmentSensorManager.cpp
@@ -15,6 +15,12 @@
 static Adafruit_BME680 BME680;
 #endif
 
+#ifdef ENV_INCLUDE_BMP085
+#define TELEM_BMP085_SEALEVELPRESSURE_HPA (1013.25)
+#include <Adafruit_BMP085.h>
+static Adafruit_BMP085 BMP085;
+#endif
+
 #if ENV_INCLUDE_AHTX0
 #define TELEM_AHTX_ADDRESS      0x38      // AHT10, AHT20 temperature and humidity sensor I2C address
 #include <Adafruit_AHTX0.h>
@@ -305,6 +311,21 @@ bool EnvironmentSensorManager::begin() {
   }
   #endif
 
+  #if ENV_INCLUDE_BMP085
+  // first arg is MODE
+  // 0: ULTRALOWPOWER
+  // 1: STANDARD
+  // 2: HIGHRES
+  // 3: ULTRAHIGHRES
+  if (BMP085.begin(1, TELEM_WIRE)) {
+    MESH_DEBUG_PRINTLN("Found sensor BMP085");
+    BMP085_initialized = true;
+  } else {
+    BMP085_initialized = false;
+    MESH_DEBUG_PRINTLN("BMP085 was not found at I2C address %02X", 0x77);
+  }
+  #endif
+
   return true;
 }
 
@@ -447,6 +468,14 @@ bool EnvironmentSensorManager::querySensors(uint8_t requester_permissions, Cayen
     }
     #endif
 
+    #if ENV_INCLUDE_BMP085
+    if (BMP085_initialized) {
+        telemetry.addTemperature(TELEM_CHANNEL_SELF, BMP085.readTemperature());
+        telemetry.addBarometricPressure(TELEM_CHANNEL_SELF, BMP085.readPressure() / 100);
+        telemetry.addAltitude(TELEM_CHANNEL_SELF, BMP085.readAltitude(TELEM_BMP085_SEALEVELPRESSURE_HPA * 100));
+    }
+    #endif
+
   }
 
   return true;
diff --git a/src/helpers/sensors/EnvironmentSensorManager.h b/src/helpers/sensors/EnvironmentSensorManager.h
index 133d26504..5f1c08e2e 100644
--- a/src/helpers/sensors/EnvironmentSensorManager.h
+++ b/src/helpers/sensors/EnvironmentSensorManager.h
@@ -21,6 +21,7 @@ class EnvironmentSensorManager : public SensorManager {
   bool VL53L0X_initialized = false;
   bool SHT4X_initialized = false;
   bool BME680_initialized = false;
+  bool BMP085_initialized = false;
 
   bool gps_detected = false;
   bool gps_active = false;

From 4cfbd3bad556abfdb03d5a00023b28536842b59f Mon Sep 17 00:00:00 2001
From: Wesley Ellis <tahnok@gmail.com>
Date: Wed, 22 Oct 2025 16:53:11 -0400
Subject: [PATCH 2/2] Switch BMP085 mode to 0 for ULTRALOWPOWER

---
 src/helpers/sensors/EnvironmentSensorManager.cpp | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/helpers/sensors/EnvironmentSensorManager.cpp b/src/helpers/sensors/EnvironmentSensorManager.cpp
index 41d50e92c..98339105b 100644
--- a/src/helpers/sensors/EnvironmentSensorManager.cpp
+++ b/src/helpers/sensors/EnvironmentSensorManager.cpp
@@ -312,12 +312,9 @@ bool EnvironmentSensorManager::begin() {
   #endif
 
   #if ENV_INCLUDE_BMP085
-  // first arg is MODE
-  // 0: ULTRALOWPOWER
-  // 1: STANDARD
-  // 2: HIGHRES
-  // 3: ULTRAHIGHRES
-  if (BMP085.begin(1, TELEM_WIRE)) {
+  // First argument is  MODE (aka oversampling)
+  // choose ULTRALOWPOWER
+  if (BMP085.begin(0, TELEM_WIRE)) {
     MESH_DEBUG_PRINTLN("Found sensor BMP085");
     BMP085_initialized = true;
   } else {