T-Beam Supreme V3 OLED Display is not showing information

[derSuessmann]

Problem description

After installing the companion firmware v1.15.0 on a Lilygo T-Beam Supreme ESP32-S3 V3.0 the display stays dark.

The device came originally with Meshtastic preinstalled. It showed the Meshtastic information on its OLED display. Installing MeshCore Companion Bluetooth from https://flasher.meshcore.io/lilygo-t-beam-supreme-sx1262/ seemed to work, but the OLED display stays dark after rebooting.

Analysis

Lilygo's documentation at https://github.com/Xinyuan-LilyGO/LilyGo-LoRa-Series/blob/master/docs/en/t_beam_supreme/t_beam_supreme_hw.md states that the OLED has a another I2C address (0x3D instead of 0x3C), if the device has a MAG sensor QMC6310N at 0x3C.

Proposed solution

Extend the code to include 0x3D as I2C address.

1. change bool SH1106Display::begin() similar to the proposal in Display Fix for different versions of TBeam Supreme #2591, but extending bool SH1106Display::i2c_probe(TwoWire &wire, uint8_t addr) to probe for a SH1106 at the probed address instead.
2. remove DISPLAY_ADDRESS completely. This will also affect the code of wio-tracker-l1.
3. change void TBeamBoard::scanDevices(TwoWire *w) to add the additional address for debugging.

The best solution seems to check if at 0x3C is a SH1106 and try 0x3D, if it is not.

Please advise me, if I should just add another variant (e.g. lilygo_tbeam_supreme_SX1262_v3).