Greetings and salutations, fellow Arduinoers ;). I am close to loosing my mind over this stupid GSM module I bought off ebay. Its the Sim900A 5V one. So, here's the deal. I cannot get it to respond to anything, it sometimes gives me some backwards ? in return, sporadically. I have hooked it up to a…

About the SIM900A module

dannable December 6, 2017, 9:15pm 9

Fairly straight forward:

Topic		Replies	Views
Sim900 GSM module Project Guidance	32	6212	August 18, 2021
Sim900a mini gsm module not working Arduino GSM Shield	3	763	February 22, 2023
Sim900a with arduino uno Networking, Protocols, and Devices	4	721	May 6, 2021
GSM SIM900A Module - Output From Serial Monitor Arduino GSM Shield	3	1806	May 6, 2021
I am having trouble with my GSM SIM 900A Networking, Protocols, and Devices	9	237	September 20, 2023