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add PCF8574(A) port expander as passive 4x4 keyboard #3493

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untested for now, white collar code.

@caveman99 caveman99 force-pushed the portexpander-keyboard branch 2 times, most recently from 85d6010 to 0d8efa2 Compare May 11, 2024 14:17
@HarukiToreda
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What kind of hardware would I need to test this?

@caveman99
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What kind of hardware would I need to test this?

i used https://aliexpress.com/item/1005006386752091.html for testing, but running into time constraints.

@Nestpebble
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Nestpebble commented Oct 19, 2024

I've tested this this evening, and I get success finding the module:

DEBUG | ??:??:?? 1 I2C device found at address 0x20
INFO  | ??:??:?? 1 PCF8574A based keyboard found

but then I get failure to initialise it:

WARN  | ??:??:?? 7 [GPS] Failed to find GNSS Module (baudrate 9600)
ERROR | ??:??:?? 7 [matrixPE] Failed to initialize I2C keypad

So, help me @caveman99, you're my only hope!

@caveman99 caveman99 added the pinned Exclude from stale processing label Oct 30, 2024
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3 participants