Geeetech

ok
I will do next thing

Ill send simple AT command every hour , may be this wake up it

Hi zhangxueyou
do you have sourcecode for connection to mobile network by sim900?

Hi All,

I have sim900 board + uno r3

I made caller/dialer.

I met next situation:

my device lost network after night. Certainly I wrote source code, which reconnect if no connection with mobile network/

But

Why it is losing time by time ? how to check correctly or save my network connection?