It is very funny that certain manufactures do not implement the complete AT commands for their modems. Or, the information is not available easily on if they support all the AT commands and how to use these commands. Anyway, I learnt few things out of my own experience.
1. Most of the commands can first be verified if they are supported by the modem. The generic syntax is
AT+xxxx=?
where xxxx represents the command name. For example
AT+CGMS=? command will tell you where SMS can be sent using the connected GSM Modem.
It is very important to test all the commands that we intend to use before hand to avoid any surprises.
Hope it helps when you experiment on the topic next time.
Till next, take care.
- Manoj
--------
