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QT 12C question
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QT 12C question

by Jonozilla on Fri Jan 21, 2022 10:30 pm

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

Jonozilla
 
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Re: QT 12C question

by T_Mo on Sat Jan 22, 2022 4:31 am

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.

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Please be positive and constructive with your questions and comments.