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GSM-PPP on main and on version v3.2.0 question

#modem

Federico GC

Hi all,
I have a board with a STM32L04 microcontroller and a SIM7600 evaluation board.
The gsm-ppp driver works fine in a zephyr branch from 23 September but is not working with latest main code.
with the code from September 23:

[00:00:33.449,000] <inf> modem_gsm: Manufacturer: SIMCOM IN

[00:00:33.513,000] <inf> modem_gsm: Model: SIMCOM_SIM7600G

[00:00:33.577,000] <inf> modem_gsm: Revision: +CGMR: **********************

[00:00:33.640,000] <inf> modem_gsm: IMEI: ************************

[00:00:33.700,000] <inf> modem_gsm: IMSI: ************************

[00:00:33.762,000] <inf> modem_gsm: ICCID: ***********************

[00:00:33.832,000] <inf> modem_gsm: Attached to packet service!

[00:00:54.043,000] <inf> net_ppp: Initializing PPP to use serial@40013800

[00:00:54.123,000] <inf> lte_module: Network connected

but with the latest code I get:

[00:15:58.409,000] <inf> modem_gsm: Manufacturer: SIMCOM IN

[00:15:58.472,000] <inf> modem_gsm: Model: SIMCOM_SIM7600G

[00:15:58.536,000] <inf> modem_gsm: Revision: +CGMR: LE20B03SIM7600M22

[00:15:58.600,000] <inf> modem_gsm: IMEI: 868822042456358

[00:15:58.661,000] <inf> modem_gsm: IMSI: 722341328309992

[00:15:58.726,000] <inf> modem_gsm: ICCID: 89543431221283099921

[00:15:58.801,000] <inf> modem_gsm: Attached to packet service!

[00:16:19.007,000] <inf> net_ppp: Initializing PPP to use serial@40013800

and never connects the interface (I wait for 15min).

my config is:

# GSM modem support

CONFIG_MODEM=y

CONFIG_MODEM_GSM_PPP=y

CONFIG_MODEM_GSM_SIMCOM=y

# Network management events

CONFIG_NET_CONNECTION_MANAGER=y

# PPP networking support

CONFIG_NET_NATIVE=y

CONFIG_NET_DRIVERS=y

CONFIG_NET_PPP=y

CONFIG_NET_L2_PPP=y

CONFIG_NET_L2_PPP_TIMEOUT=10000

CONFIG_MODEM_SHELL=y

CONFIG_MODEM_GSM_RX_STACK_SIZE=1024

CONFIG_MODEM_GSM_APN="************"

CONFIG_GSM_PPP_AUTOSTART=n

CONFIG_MODEM_CMD_HANDLER_MAX_PARAM_COUNT=20

Thanks,
Fede

Lubos, Robert

#3124

Hi,

It’s likely related to https://github.com/zephyrproject-rtos/zephyr/issues/52139, we’re reverting the changes that introduced the regression here: https://github.com/zephyrproject-rtos/zephyr/pull/52257.

Regards,

Robert

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Subject: [Zephyr-users] GSM-PPP on main and on version v3.2.0 question #modem

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