PPP Network

[tangerino]

I have a working hardware with 4G modem.
The modem setup is OK, from reseting it to configure APN.

Is not clear if PPP needs to be called after we dial ATD*99# or PPP will dial itself.

No error is shown with the following code

Code: Select all

        print(f'[MODM] CSQ: {rssi} {ber}')
        wait_sim_card_ready(modem, timeout=60000)
        wait_register_network(modem, timeout=30000)
        set_apn(modem, apn='my_apn')
        print(modem.AT("operator"))
        print(modem.AT("dial", '*99#'))
        ppp = network.PPP(modem.uart)
        ppp.active(True)
        ppp.connect("sl2sfr", "")
        while True:
            status = ppp.status()
            print(ppp.ifconfig())
            connection_state = ppp.isconnected()
            print(f'[PPP] Connection state: {connection_state}. Status {status}')
            sleep(5)

No error,
Connection state is always False

Code: Select all

('0.0.0.0', '0.0.0.0', '255.255.255.255', '0.0.0.0')
[PPP] Connection state: False. Status None

Is there any document dedicated to PPP?
Is there any working code available, examples, etc?

Thank you in advance.

[tangerino]

Anyone can help me here, please?

[KJM]

It's been a long time since I saw anyone try to use an ATD dial cmd. What brand modem are you using with which sim provider & where did you get the idea for the code example you've given?

[tangerino]

My setup is:
ESP32 - 8MB SRAM
Modem - Quectel EG915

The code is my own with very little help from the forum.
The SIM is an operational one, tested with modem + RaspberryPi + PPP.
Once you dial and*99# you yield the uart control to PPP services (this is my understanding) that will talk PPP and implement the interface to be used as any network channel.

[KJM]

I haven't tangled with a Quectel. My usual approach with a new cell modem is to follow an AT setup example usually provided in the modem manual. Failing that I try a google search for the language/board+modem (eg upython+quectel or ESP32+quectel)

If your PPP setup worked on an RPI+quectel but not with an ESP32+quectel it's probably because it's using some python library that upython doesn't have or something from the debian OS. I vaguely recall that a Sierra 320U I had on an rpi relied on a call to the OS to get it running.

Maybe checkout https://python-quectel-com.translate.go ... _tr_pto=sc or https://forums.quectel.com/