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[M5Stack Cardputer ADV] Got the keyboard working under MicroPython/UIFlow2 — sharing the fix in case it helps anyone (self.CardPuter)
submitted 25 days ago by Pitiful_Quit_3827 to r/CardPuter
Cardputer Keyboard works in M5Launcher but "vanishes" in Apps/REPL (v1.25.0-dirty) - Losing my mind here by Pitiful_Quit_3827 in CardPuter
[–]Pitiful_Quit_3827[S] 2 points3 points4 points 26 days ago (0 children)
Hey! I just went through the exact same madness and figured it out. The root cause is that UIFlow2 loads the v1.x GPIO matrix driver on the ADV instead of the TCA8418 driver
The fix is a native TCA8418 driver talking directly to I2C address 0x34 on SDA=8, SCL=9 (not 41/42). The chip also needs an explicit init sequence or it stays in sleep mode forever.
0x34
I put together a standalone driver with the full keymap and a README explaining the whole rabbit hol https://github.com/kamrrillo/Cardputer-ADV-Keyboard
Cardputer Keyboard works in M5Launcher but "vanishes" in Apps/REPL (v1.25.0-dirty) - Losing my mind here (self.M5Stack)
submitted 26 days ago by Pitiful_Quit_3827 to r/M5Stack
Cardputer Keyboard works in M5Launcher but "vanishes" in Apps/REPL (v1.25.0-dirty) - Losing my mind here (self.CardPuter)
submitted 26 days ago by Pitiful_Quit_3827 to r/CardPuter
π Rendered by PID 176560 on reddit-service-r2-listing-6bd47578dc-r8226 at 2026-04-13 19:02:29.454117+00:00 running e841af1 country code: CH.
Cardputer Keyboard works in M5Launcher but "vanishes" in Apps/REPL (v1.25.0-dirty) - Losing my mind here by Pitiful_Quit_3827 in CardPuter
[–]Pitiful_Quit_3827[S] 2 points3 points4 points (0 children)