I’ve managed to tweak the latest firmware to run on old-school Pycom LoPy 1.0 chips. I’ve seen a bit of discussion around LoPy4 but doesn’t look like anyone’s made it run on the initial version yet.
This chip is definitely old and discontinued so it doesn’t make sense to merge any of this to main, but I’m hoping this might be useful for someone else with this old hardware lying around.
LoRa and Bluetooth are fully working for me pairing with the Android app.