GSM AT COMMAND | How to upload .amr audio file

问题

I can list the directory using below command. AT+FSLS=\

i found AT+FSCREATE="1.amr",3 command to crate files in directory but the problem is, how to upload the file from my local drive.

回答1:

I don't have any modem that supports AT+FSWRITE command. But based on SIMcom AT-command manual, AT+FSWRITE= command responds with prompt: >. Manual does not clearly tell how to use the command.

But it might work similar way than AT+CMGS= command:

1. Send AT+FSWRITE=1.arm,0,512,10 command to modem.
2. Wait > from the modem.
3. Write content of the file (512 bytes) to the modem.
4. Send Ctrl-Z char (0x1A hex) to the modem.
5. Wait OK/ERROR from the modem.

Step 4. may not be needed, because size of the file is in the command.

来源：https://stackoverflow.com/questions/52622372/gsm-at-command-how-to-upload-amr-audio-file