0

Programmable Keypad Setup
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Programmable Keypad Setup

by cjbarth on Wed Jan 13, 2021 8:02 am

I'm very new to the maker community, however, I'm a seasoned programmer. I really would like a programmable HID keypad and it seems that I might use a label maker plus the following to get the job done:

https://www.adafruit.com/product/3844
https://www.adafruit.com/product/4600

So I've been doing a lot of research and talking to my friends, and it seems that this would work, but I also want to minimize (eliminate) soldering, if I can. I came across this tutorial (https://create.arduino.cc/projecthub/mitov/i2c-matrix-keypad-with-pcf8574-pcf8574a-gpio-and-visuino-dbf72c?ref=tag&ref_id=keypad&offset=10) which seem to indicate that I can use a PCF8574 to do so. I'm not sure if the 4 pins out of that piece correspond to the 4 pins in on the QT Py and if the IDE/libraries would support such a configuration. While the tutorial looks easy, I know that looks can be deceiving.

Does anyone have any experience along these lines that they could offer a comment on the feasibility of what I'm thinking here? I couldn't just find a serial keypad, or I'd probably try to use that directly to the QT Py.
cjbarth
 
Posts: 1
Joined: Fri Mar 22, 2013 11:48 am

Please be positive and constructive with your questions and comments.