Hello. Using Arduino Nano and Sim900 to Post data from my cabin to webserver and store it in database. Every thing is working fine except when Sim900 is loosing connection to network. I want to test the connection before trying to Post the data but I dont get any echo of AT+ commands neither the response (OK or ERROR) from Sim900. The funny thing is that during setup() function I get both echo and responses.
So all the AT+ commands are working during initiation, Post, and termination of the http connection.
Im using 9600 between Nano and Sim. Echoing is enabled and I have a function to read the data from the Sim(which must be working because I have tellback during setup).
Hope someone can help