Add GPS support for SenseCap Solar variant

[Confituurke]

This PR adds GPS support for the SenseCap Solar variant using the L76KB GPS module.

Changes

• Enable GPS support via ENV_INCLUDE_GPS flag
• Add GPS pin definitions (TX, RX, EN, STANDBY) to platformio.ini
• Integrate MicroNMEA library for GPS NMEA sentence parsing
• Use EnvironmentSensorManager to support both GPS and BME280 sensors
• Configure GPS baudrate to 9600
• Initialize GPS enable pin in variant.cpp
• GPS can be enabled/disabled via device settings

Hardware

• GPS Module: L76KB
• GPS Pins:
  • TX: Pin 7 (Serial1 RX)
  • RX: Pin 6 (Serial1 TX)
  • EN: Pin 18 (GPS enable/power control)
  • STANDBY: Pin 0 (not used)

Testing

• GPS functionality tested and working
• BME280 sensor continues to work alongside GPS
• GPS can be toggled on/off via device settings

This enables location tracking capabilities for the SenseCap Solar board while maintaining compatibility with existing sensor functionality.

[Habbie]

My SenseCap P1 Pro is now running a build of this PR. GPS works, giving me location and time. I do not have a BME280 I think (at least, I did not add one myself - I get a temperature reading but not humidity).

Thank you!

[Confituurke]

My SenseCap P1 Pro is now running a build of this PR. GPS works, giving me location and time. I do not have a BME280 I think (at least, I did not add one myself - I get a temperature reading but not humidity).

Thank you!

Thank you for testing! Much appreciated.

To the repo maintainers, if any changes are needed, let me know.

[radiobuisje-cmyk]

I've also installed it, and I'm getting a proper lock on satellites, time, and position. Turning it off with GPS on/off also works.

Now I just need to find someone who can fix the PWR on/off button :)

[Habbie]

I wonder (and I can't compare to before - this GPS patched build is the first thing I installed after unpacking my sensecap) if getting location + time at some frequency (don't know how often this happens) is drawing too much power for the panel+battery to keep up in this winter weather.

[Habbie]

Based on the discussion in #1353 I will likely remove the GPS from my SenseCap. Of course this PR is still useful - some people may have a different power setup, or want the GPS because their SenseCap is on a boat or something.

In a build with this PR, if GPS is not turned on, does the GPS still draw power?

[Habbie]

In a build with this PR, if GPS is not turned on, does the GPS still draw power?

I guess

EN: Pin 18 (GPS enable/power control)

answers that!