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Contains code to use lwip PPP client or server.

• AT+PPPD Standard way to start PPP.
• AT+PPPD? Shows format for settings.
• AT+PPPD= <local_IP_address>:<remote_IP_address>, (0-127) IP setting is the same as pppd. The trailing number is a register for enabling and disabling server settings (not implemented).
• ATDTPPPD; Modem script compatible command to start PPPD. Enter 'PPPD' as the phone number in a modem script and it will issue this command to start PPPD.
• ATDTPPPD See above.

run:

$ make patch flash

to update esp-idf and esp-lwip with changes to enable PPPD server and have an error-free build.

You will need to enable PPP Support and PPP Server Support in the framework configuration:

Component config ---> LWIP ---> Enable PPP support (new/experimental) ---> Enable PPP server support (new/experimental)

Full espressif AT command documentation