I have a MC20CE which support SD card, but I can not find any document about how to use it. Can anyone help?
Hi Nero:
What function do you want to achieve through the SD card of the module?
If you just want to upload files to the SD card, you can refer to the documentation in the link below:
https://www.quectel.com/download/quectel_gsm_file_at_commands_manual_v1-5/