Modem cellullar with PPP no connectivity (socket connect returns -116)

[davidk88]

Hello,

I'm trying to use cellular connectivity on zephyr 4.2. I'm using Quectel EG915 via BG95 modem_cellular driver.

But there is no connection possible. Socket connect is returning -116 (ETIMEDOUT).

l2 ppp log:
[00:01:10.822,000] <dbg> net_l2_ppp: ppp_change_phase_debug: (0x20005c70): [0x20005f90] phase NETWORK (3) => RUNNING (4) (ppp_network_up():22) [00:01:10.823,000] <dbg> net_l2_ppp: ppp_network_up: (0x20005c70): [0x20005f90] Proto IPv4 (0x0021) up (1) [00:01:10.823,000] <dbg> net_l2_ppp: ipcp_up: (0x20005c70): [IPCP/0x200060a0] Current state OPENED (9)

This looks like that auth goes thru and IP is obtained via IPCP.

Output from shell command net iface:

Maybe the problem is in gateway that is 0.0.0.0?

In ppp log, I can see that data goes to modem, but nothing comes back. same with dhcp (shcp client gets no response).

Configuration:
CONFIG_MODEM_LOG_LEVEL_ERR=y
CONFIG_MODEM_CONTEXT=y
CONFIG_MODEM_CONTEXT_VERBOSE_DEBUG=y
CONFIG_MODEM_IFACE_UART=y
CONFIG_MODEM_SOCKET=y
CONFIG_MODEM_CELL_INFO=y
CONFIG_MODEM_CELLULAR=y
CONFIG_MODEM_AT_SHELL=y
CONFIG_MODEM_STATS=y
CONFIG_MODEM_MODULES_LOG_LEVEL_ERR=y
CONFIG_NETWORKING=y
CONFIG_NET_L2_PPP=y
CONFIG_NET_L2_PPP_TIMEOUT=10000
CONFIG_NET_L2_PPP_LOG_LEVEL_DBG=y
CONFIG_NET_IPV4_LOG_LEVEL_DBG=y
CONFIG_NET_SHELL=y
CONFIG_NET_TCP=y
CONFIG_NET_TCP_LOG_LEVEL_DBG=y
CONFIG_NET_MAX_CONN=8
CONFIG_NET_CONTEXT_RCVTIMEO=y
CONFIG_NET_LOG=y
CONFIG_NET_CORE_LOG_LEVEL_DBG=y
CONFIG_NET_CONFIG_LOG_LEVEL_DBG=y
CONFIG_NET_CONFIG_SETTINGS=y
CONFIG_NET_CONFIG_NEED_IPV4=y
CONFIG_NET_CONFIG_INIT_TIMEOUT=60
CONFIG_NET_SOCKETS_CONNECT_TIMEOUT=5000
CONFIG_NET_SOCKETS_LOG_LEVEL_DBG=y
CONFIG_NET_DHCPV4=y
CONFIG_NET_DHCPV4_LOG_LEVEL_DBG=y
CONFIG_NET_CONNECTION_MANAGER=y
CONFIG_NET_CONNECTION_MANAGER_LOG_LEVEL_DBG=y

Any hints what to check or try.

Best regards

[jukkar]

You need to enable more logs, try socket and ppp dbg log level to see what is going on.
Edit: after writing the above I realised you had the debugging enabled already. Could you place the log for example to GitHub gist?

[davidk88]

It works. There was a problem how I tested. Thank you for help.