Hardware support for T-Beam V1.2 with AXP2101

[XAct-6510]

Please add support for the new version of the Lilygo T-Beam V1.2 with the new power management chip AXP2101.

[cyberman54]

Can you provide link to specs of v1.2

[XAct-6510]

Hi, thanks for your reply! Here are the links:
https://www.amazon.de/LILYGO-Entwicklungsboard-Meshtastic-Mainboards-Soldered/dp/B0B454TB6S
https://github.com/Xinyuan-LilyGO/LilyGO-T-Beam
https://github.com/Xinyuan-LilyGO/LilyGo-LoRa-Series
AXP2101 chip: https://github.com/meshtastic/firmware/blob/7bb281d5c569870c27cdd65bcd14507148e4ca9b/src/Power.cpp#L516

[cyberman54]

In all your links, i can't find a schematic or specs for v1.2, it all renders as v1.1?

[XAct-6510]

Yes, they hid this fact pretty well, unfortunately. By changing the PMU from AXP192 to AXP2102 they have changed the versioning from 1.1 to 1.2. Please see the screenshot.

[cyberman54]

@XAct-6510 i checked the Xpowerslib example, and found that there is some refactoring of power.cpp needed. Could you do this, and make a PR?

[XAct-6510]

Unfortunately I'm not a programmer, I'm a networking guy... But I can provide you one of my 5 T-Beam V1.2 if that helps.

[cyberman54]

@XAct-6510 not necessary, because if i would code it, you could test it on your board. But currently i have no time to code this.

[XAct-6510]

As mentioned I'm not a programmer, but maybe this can be used?
https://github.com/meshtastic/firmware/blob/master/src/Power.cpp
The T-Beam V1.2 comes preinstalled with the Meshtastic firmware, which obviously works with the new hardware revision.

[cyberman54]

i saw that, but would stick to the example code of XPowersLib, because Meshtastic has more complexity. But again, you or someone else would be welcome to show up with a completely refactored power.cpp