How to: get ID-20LA RFID and SIM900 to communicate with UNO (software serials)

Projects Programming
5

Top-of-head response!

Sorry.. But I didn't know what you've expected other than a link to my shield :slight_smile:

I am unable to use pin 0 and 1. My only option is to use two software serials, one for SIM900 and one for RFID.

best regards