I connected my SIM 800L modul with my Arduino UNO (SoftwareSerial etc.), AT Commands work. I can read for example phonebook entries form the inserted SIM card. But it will not connect to any network.
AT+CSQ ->CSQ = 0,0 but if the SIM ist not inserted QSQ is between 15 and 25.
Can somebody help me? I didnt’t find anything on google.
I use this gsm module:
Tank you guys!
(I understand answers in german too)
gsm_at.ino (917 Bytes)