QT 12C question Moderators: adafruit_support_bill, adafruit

[Jonozilla]

I am getting my feet wet in attempts to make my own keypad. What would be the best controller for a few NeoKey 1x4 and Adafruit rotary econders? I was thinking of getting the Feather RP2040 for the usb-c.

Thanks!
-Jono

[T_Mo]

Assuming the rotary encoder is the type with the Stemma connector, the RP2040 Feather ought to work fine. I've daisy-chained quite a few I2C devices in series without trouble on an RP2040, and it has quite a bit of processing power and memory.

You will need to adjust the I2C address on the keypads so they're all unique addresses. I have not studied that part specifically, but they're generally configurable to several different addresses via soldering some pads.