houxn22/esp-idf-ppp-server

Example using a ppp server to connect two esp32 with a serial connection.

PPP SERVER example

Instructions

Check out this repo in two locations, one client and one server.

On both sides specify:

• EXAMPLE_MODEM_DEVICE_NULLMODEM Will directly connect ppp without any AT crap

• EXAMPLE_MODEM_PPP_BAUDRATE to your desired baudrate

*EXAMPLE_MODEM_PPP_FLOW 0: none, 1: software, 2: hardware

• EXAMPLE_MODEM_UART_TX_PIN Default 16

• EXAMPLE_MODEM_UART_RX_PIN Default 17

• EXAMPLE_MODEM_UART_RTS_PIN Default 27

• EXAMPLE_MODEM_UART_CTS_PIN Default 23

• CONFIG_EXAMPLE_LCP_ECHO To detect if link goes down

On the server side:

• Apply esp-idf-ppp_server.patch
• Enable CONFIG_LWIP_PPP_SERVER_SUPPORT

Connect both chips togheter, remember to cross TX/TX and RTS/CTX

On boot, client will automatlicly connect to server

Run ping or iptraf to test the link.