问题
I have been working for hours to solve this problem.
As you see above, I got CMS error 321
explanation of the eror code 321
The memory/message storage index assigned to the AT command is invalid.
source: http://www.developershome.com/sms/resultCodes2.asp
With that code, I wanted to get message count, and to read sms and I got the same error..
I can send sms with AT commands but I want to read sms from mobil phone. I connected via usb and bluetooth, and the result is the same.. I can send sms but cant read sms ..
What is the wrong on it?
For reading sms I use that code
AT+CMGL="ALL" or "REAC UNREAD" .. etc.
I've used Samsung Galaxy S I9000 and HTC Evo 3d
回答1:
Here's the link from where you can search your error and came to know about the reason/logic behind the error: http://www.developershome.com/sms/resultCodes2.asp#16.2.1.1.Table of +CMS Error Codes and Their Meanings|outline
From there, we know that the read message operation failed because an invalid memory index was assigned to the AT command +CMGL. Note that after the occurrence of a +CMS error, the GSM/GPRS modem or mobile phone will not process the remaining AT commands in the command line.
回答2:
I know this is old but... I see you used AT+CPMS="SM" so you are trying to read messages from the SIM card. It appears you may be looking to a folder that is empty. Have you tried all of the other storages where the messages may have arrived? Those are detailed in your screen capture (AT+CPMS=?)
At this point I think you have already solved that.
来源：https://stackoverflow.com/questions/18935354/how-to-read-sms-from-mobil-phone-with-at-commands