Search found 2 matches

by Ari_Dosky
Sat Apr 25, 2015 5:27 pm
Forum: Open Hardware
Topic: Arduino GPRS Shield SIM900 not working by software
Replies: 11
Views: 81246

Re: Arduino GPRS Shield SIM900 not working by software

i have the same problem but i fixed it, just use softwate serial and do not forget to type SMS service number before typing target number.. No Sim900 keep baud rate fix and does not change.
by Ari_Dosky
Fri Apr 24, 2015 7:07 pm
Forum: Open Hardware
Topic: Arduino GPRS Shield SIM900 not working by software
Replies: 11
Views: 81246

Re: Arduino GPRS Shield SIM900 not working by software

i have the same problem and i fixed it :D :idea: :
the problem is the GPRS did not know the SMS service center number, to fixed it use command AT+CSCA="+964750001140" (change number with your mobile service provider), be aware this commad should type in between command AT+CMGF=1 and AT+CMGS="target ...