SIM800L recognize SIM but QSQ = 0,0 - PLEASE HELP

Hardware Arduino GSM Shield
#1

Hello there!

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)

#2

hi,
I have no experience with SIM800L but only with SIM900. Both are controlled with At commands. Maybe there are some specific AT commands for SIM800L and SIM900, but connecting to a GSM network is a standard task and should be the same commands.

To work with SIM900 there are libraries available which should be usable also for SIM800L. Google will find such code.

#3

does Germany still supports 2G ?

#4