Membrane keypad to Heltec Lora 32?

#1

Hi all, I’m trying to connect my 4x3 membrane keypad to my new Heltec Lora 32, but can’t get it working? I thought it would be as simple as connecting to seven GPIO pins? Thanks for any help! Paul

#2

Hi,

Can you show more details? ways of the communication, pin connect…

#3

Which seven pins on the Heltec should I connect the membrane keypad to? Thanks, Paul