From 4d2b176ccc829ea606a72dcfbb73df14e9ac78fd Mon Sep 17 00:00:00 2001
From: taco <taco@sly.nu>
Date: Sat, 21 Jun 2025 13:04:39 +1000
Subject: [PATCH] feature: GPS support on HeltecV3

GPS support via EnvironmentSensorManager. Connect GPS RX to pin 45, TX to pin 46.
Note that while you can disable using the GPS there is no way to power down the GPS without using a mosfet and adjusting PIN_GPS_EN.
---
 variants/heltec_v3/platformio.ini | 7 ++++++-
 variants/heltec_v3/target.cpp     | 9 ++++++++-
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/variants/heltec_v3/platformio.ini b/variants/heltec_v3/platformio.ini
index e8818fdd..8f9b1a27 100644
--- a/variants/heltec_v3/platformio.ini
+++ b/variants/heltec_v3/platformio.ini
@@ -21,6 +21,10 @@ build_flags =
   -D ENV_INCLUDE_BME280=1
   -D ENV_INCLUDE_INA3221=1
   -D ENV_INCLUDE_INA219=1  
+  -D ENV_INCLUDE_GPS=1
+  -D PIN_GPS_RX=45
+  -D PIN_GPS_TX=46
+  -D PIN_GPS_EN=-1
 build_src_filter = ${esp32_base.build_src_filter}
   +<../variants/heltec_v3>
   +<helpers/sensors>    
@@ -30,7 +34,8 @@ lib_deps =
   adafruit/Adafruit INA3221 Library @ ^1.0.1
   adafruit/Adafruit INA219 @ ^1.2.3
   adafruit/Adafruit AHTX0 @ ^2.0.5
-  adafruit/Adafruit BME280 Library @ ^2.3.0    
+  adafruit/Adafruit BME280 Library @ ^2.3.0
+  stevemarple/MicroNMEA @ ^2.0.6
 
 [env:Heltec_v3_repeater]
 extends = Heltec_lora32_v3
diff --git a/variants/heltec_v3/target.cpp b/variants/heltec_v3/target.cpp
index de8e0f92..4ae06be3 100644
--- a/variants/heltec_v3/target.cpp
+++ b/variants/heltec_v3/target.cpp
@@ -14,7 +14,14 @@ WRAPPER_CLASS radio_driver(radio, board);
 
 ESP32RTCClock fallback_clock;
 AutoDiscoverRTCClock rtc_clock(fallback_clock);
-EnvironmentSensorManager sensors;
+
+#if ENV_INCLUDE_GPS
+  #include <helpers/sensors/MicroNMEALocationProvider.h>
+  MicroNMEALocationProvider nmea = MicroNMEALocationProvider(Serial1);
+  EnvironmentSensorManager sensors = EnvironmentSensorManager(nmea);
+#else
+  EnvironmentSensorManager sensors;
+#endif
 
 #ifdef DISPLAY_CLASS
   DISPLAY_CLASS display;