I have just received a Nokia 30 a few days ago and have spent a little time trying to read SMS messages from a SIM card in the device, with little success. I have had no previous experience with AT commands and am struggling to understand exactly how to do what I want to do.
I only need to build a program to read SMS messages as they arrive on the SIM. I need to read the message, move it into the database and delete it from the SIM card. I am struggling with the correct AT commands. I have conencted through the Hyperterminal to try to issue the commands successfully.
Using at+cmgr=1, I was able to read some messages initially (although they were in hex format, but that should not be a problem). However, now when I issue the at+cmgr=1 command I cannot read any messages and I know there are SMS on the SIM. Also, the device flashes red and green to say that there are messages waiting on the SIM, but when I read the messages, it still flashes, and I tried to delete the messages with at+cmgd=1, but the lights still flash to say that there are messages on the SIM.
Does anyone know what command I should issue to do the simple job which I need to do? I am largely clueless.