Arduino nano microcontroller + SD card + SIM800L modem connection diagram is shown below
Develop a library that implements downloading files from the Developer's website via FTP
IP address of the server [login to view URL]
[login to view URL] [login to view URL] files
It is required to develop a modem control library. Library requirements
1. Initialization of modem communication with a mobile network provider.
2. Verify that the modem is connected to the network provider.
3. Receiving via SMS the file name to download.
4. Download the file from the developer’s site and save it to the SD card / boot / <file name>
5. To provide for the issuance of debug information in the format
AT command transferred to the modem
Modem response to AT command
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