Hi, i just bought a two Uno shields and two GSM shields. No i have follow problems: SIM900 modul and component U1: LM317 getting very hot. I can upload codes to Uno and code running but GSM_GPRSLibrary_AT examble says in serial monitor -> GSM Shield testing. DB:NO RESP DB:NO RESP DB:NO RESP ERR…

Uno and GSM shield SIM900

system April 19, 2012, 9:45pm 2

hi ya can u tell me what program u are using

Topic		Replies	Views
Ennesimo problema GSM shield... Generale	14	4388	May 7, 2021
error: sim900 doesn't answer. check power and serial pins in gsm.cpp status=idle GSM Shield	5	8210	May 6, 2021
Arduino UNO \| ICOMSAT v1.1 SIM900 GSM Module Networking, Protocols, and Devices	4	3820	May 6, 2021
Arduino UNO with SIM900 General Guidance	3	1917	May 5, 2021
ITEAD SIM900-GPRS-GSM-Modul doesn't work GSM Shield	4	2953	May 6, 2021