I've been having problems getting a reliable connection (and intelligible feedback on serial) from a GSM shield - the MG2639 - I'm using for a project. I just need SMS capability.
How can I get a more reliable connection rate?
Connection is rarely established (say 1 in 5 times), but I can confirm it works - the Arduino can send an SMS when the temperature increases above a set limit. I'm aiming for an autoresponder-style setup in my project eventually, which I can leave alone for it to control a fan.
There's enough power (9V, 1,7A) and a 2G-compatible SIM, so those aren't the issues. I've also configured the shield to be usable with the mega and SoftwareSerial like so for use on pin 10. This set-up does work, but rarely.
Is it the pin I chose? Would there be a better one to try? Should I build a repeat loop into the .cpp file?
It doesn't matter which example sketches I'm using, this rarely gets off the ground. Any advice would be appreciated.