Cellular Modem Example Stuck on "L4 connected" with BG95 on STM32H573I-DK #87401

EugeneKolesnyk · 2025-03-20T12:27:29Z

EugeneKolesnyk
Mar 20, 2025

Hello, I'm trying to run the Cellular Modem example on the STM32H573I-DK board with a Quectel BG95 modem. I am using Zephyr 4.0.0. The example builds and runs successfully but fails to fully enter PPP mode. It gets stuck at "L4 connected", and at some point, it starts continuously looping the periodic chat script.
Device tree overlay used:

/ {
	aliases {
    	modem = &modem;
	};
};
&usart3 {
	current-speed = <115200>;
	pinctrl-names = "default";
	status = "okay";    
	pinctrl-0 = <&usart3_tx_pb10 &usart3_rx_pb11>;
	modem: modem {
    	compatible = "quectel,bg95";
    	status = "okay";
    	mdm-power-gpios = <&gpiog 15 GPIO_ACTIVE_LOW>;
	};
};


/ {
	arduino_header: connector {
    	gpio-map = <>;
	};
};

Configuration used:

CONFIG_UART_ASYNC_API=n
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y

Logs:

[00:00:33.052,000] <dbg> modem_chat: modem_chat_script_start: running script: quectel_bg95_init_chat_script
[00:00:33.052,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 0
[00:00:33.052,000] <dbg> modem_chat: modem_chat_script_next: sending: ATE0
[00:00:33.074,000] <dbg> modem_chat: modem_chat_on_unknown_command_received: ATE0
[00:00:33.074,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:33.074,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 1
[00:00:33.074,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
[00:00:33.806,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:33.806,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 2
[00:00:33.806,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CMEE=1
[00:00:33.828,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:33.828,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 3
[00:00:33.828,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CREG=1
[00:00:33.849,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:33.849,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 4
[00:00:33.849,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGREG=1
[00:00:33.871,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:33.871,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 5
[00:00:33.871,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG=1
[00:00:33.893,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:33.893,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 6
[00:00:33.893,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CREG?
[00:00:33.915,000] <dbg> modem_chat: modem_chat_log_received_command: +CREG:  1 0
[00:00:33.915,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:33.915,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 7
[00:00:33.915,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG?
[00:00:33.937,000] <dbg> modem_chat: modem_chat_log_received_command: +CEREG:  1 4
[00:00:33.937,000] <dbg> modem_chat: modem_chat_log_received_command: OK
--- 3 messages dropped ---
[00:00:33.937,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 8
[00:00:33.937,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGREG?
[00:00:33.959,000] <dbg> modem_chat: modem_chat_log_received_command: +CGREG:  1 0
[00:00:33.959,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:33.959,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 9
[00:00:33.959,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGSN
[00:00:33.983,000] <dbg> modem_chat: modem_chat_log_received_command:  864475041801522
[00:00:33.983,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 10
[00:00:33.983,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:33.983,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 11
[00:00:33.983,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGMM
[00:00:34.004,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 13
[00:00:34.004,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGMI
[00:00:34.026,000] <dbg> modem_chat: modem_chat_log_received_command:  Quectel
[00:00:34.026,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 14
[00:00:34.026,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:34.026,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 15
[00:00:34.026,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGMR
[00:00:34.047,000] <dbg> modem_chat: modem_chat_log_received_command:  BG95M3LAR02A03
[00:00:34.047,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 16
[00:00:34.047,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:34.047,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 17
[00:00:34.047,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CIMI
[00:00:34.071,000] <dbg> modem_chat: modem_chat_log_received_command:  255062095310961
[00:00:34.071,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 18
[00:00:34.071,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:34.071,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 19
[00:00:34.071,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+QCCID
[00:00:34.093,000] <dbg> modem_chat: modem_chat_log_received_command: +QCCID:  89380062300687995240
[00:00:34.093,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 20
[00:00:34.093,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:34.094,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_init_chat_script: step: 21
[00:00:34.094,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CMUX=0,0,5,127
[00:00:34.116,000] <dbg> modem_chat: modem_chat_on_unknown_command_received: OK
[00:00:34.394,000] <dbg> modem_chat: modem_chat_script_stop: quectel_bg95_init_chat_script: complete
[00:00:34.517,000] <inf> modem_at_shell: pipe connected
[00:00:34.517,000] <inf> modem_at_shell: opening pipe
[00:00:34.539,000] <inf> modem_at_shell: pipe opened
[00:00:34.539,000] <inf> modem_at_shell: chat attached
[00:00:34.660,000] <dbg> modem_chat: modem_chat_script_start: running script: quectel_bg95_dial_chat_script
[00:00:34.660,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_dial_chat_script: step: 0
[00:00:34.660,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGACT=0,1
[00:00:34.686,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:34.686,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_dial_chat_script: step: 1
[00:00:34.686,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGDCONT=1,"IP","internet"
--- 3 messages dropped ---
[00:00:34.765,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:34.765,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_dial_chat_script: step: 3
[00:00:34.765,000] <dbg> modem_chat: modem_chat_script_next: sending: ATD*99***1#
[00:00:34.765,000] <dbg> modem_chat: modem_chat_script_stop: quectel_bg95_dial_chat_script: complete
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x0d because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x0a because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x43 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x4f because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x4e because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x4e because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x45 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x43 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x54 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x20 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x31 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x35 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x30 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x30 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x30 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x30 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x30 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x30 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x30 because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x0d because 0x7e was expected.
[00:00:34.798,000] <dbg> modem_ppp: modem_ppp_is_byte_expected: Dropping byte 0x0a because 0x7e was expected.
[00:00:36.766,000] <dbg> modem_chat: modem_chat_script_start: running script: quectel_bg95_periodic_chat_script
[00:00:36.766,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 0
[00:00:36.766,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CREG?
[00:00:36.789,000] <dbg> modem_chat: modem_chat_log_received_command: +CREG:  1 0
[00:00:36.789,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:36.789,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 1
[00:00:36.789,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG?
[00:00:36.811,000] <dbg> modem_chat: modem_chat_log_received_command: +CEREG:  1 4
[00:00:36.811,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:36.811,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 2
[00:00:36.811,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGREG?
[00:00:36.834,000] <dbg> modem_chat: modem_chat_log_received_command: +CGREG:  1 0
[00:00:36.834,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:36.834,000] <dbg> modem_chat: modem_chat_script_stop: quectel_bg95_periodic_chat_script: complete
[00:00:38.834,000] <dbg> modem_chat: modem_chat_script_start: running script: quectel_bg95_periodic_chat_script
[00:00:38.834,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 0
[00:00:38.834,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CREG?
[00:00:38.857,000] <dbg> modem_chat: modem_chat_log_received_command: +CREG:  1 0
[00:00:38.857,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:38.857,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 1
[00:00:38.857,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG?
[00:00:38.880,000] <dbg> modem_chat: modem_chat_log_received_command: +CEREG:  1 4
[00:00:38.880,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:38.880,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 2
[00:00:38.880,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGREG?
[00:00:38.903,000] <dbg> modem_chat: modem_chat_log_received_command: +CGREG:  1 0
[00:00:38.903,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:38.903,000] <dbg> modem_chat: modem_chat_script_stop: quectel_bg95_periodic_chat_script: complete
[00:00:39.068,000] <dbg> modem_chat: modem_chat_log_received_command: +CREG:  2
[00:00:39.068,000] <dbg> modem_chat: modem_chat_log_received_command: +CGREG:  2
[00:00:39.940,000] <dbg> modem_chat: modem_chat_log_received_command: +CGREG:  1
[00:00:39.965,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Receiving PPP frame
[00:00:39.965,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Received PPP frame (len 29)
[00:00:39.965,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Receiving PPP frame
[00:00:39.965,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Received PPP frame (len 12)
[00:00:39.991,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Receiving PPP frame
[00:00:39.991,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Received PPP frame (len 13)
[00:00:40.014,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Receiving PPP frame
[00:00:40.014,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Received PPP frame (len 12)
[00:00:40.042,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Receiving PPP frame
[00:00:40.042,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Received PPP frame (len 12)
[00:00:40.042,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Receiving PPP frame
[00:00:40.042,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Received PPP frame (len 9)
[00:00:40.093,000] <dbg> modem_chat: modem_chat_on_unknown_command_received: +CTZE: "+08",0,"2025/03/20,11:44:09"
[00:00:40.257,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Receiving PPP frame
[00:00:40.257,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Received PPP frame (len 8)
[00:00:40.257,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Receiving PPP frame
[00:00:40.258,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Received PPP frame (len 26)
[00:00:40.286,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Receiving PPP frame
[00:00:40.286,000] <dbg> modem_ppp: modem_ppp_process_received_byte: Received PPP frame (len 26)
[00:00:41.941,000] <dbg> modem_chat: modem_chat_script_start: running script: quectel_bg95_periodic_chat_script
[00:00:41.941,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 0
[00:00:41.941,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CREG?
[00:00:41.963,000] <dbg> modem_chat: modem_chat_log_received_command: +CREG:  1 2
[00:00:41.963,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:41.963,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 1
[00:00:41.963,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG?
[00:00:41.986,000] <dbg> modem_chat: modem_chat_log_received_command: +CEREG:  1 4
[00:00:41.986,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:41.986,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 2
[00:00:41.986,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGREG?
[00:00:42.009,000] <dbg> modem_chat: modem_chat_log_received_command: +CGREG:  1 1
[00:00:42.009,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:42.009,000] <dbg> modem_chat: modem_chat_script_stop: quectel_bg95_periodic_chat_script: complete
[00:00:44.009,000] <dbg> modem_chat: modem_chat_script_start: running script: quectel_bg95_periodic_chat_script
[00:00:44.009,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 0
[00:00:44.009,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CREG?
[00:00:44.032,000] <dbg> modem_chat: modem_chat_log_received_command: +CREG:  1 2
[00:00:44.032,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:44.032,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 1
[00:00:44.032,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG?
[00:00:44.055,000] <dbg> modem_chat: modem_chat_log_received_command: +CEREG:  1 4
[00:00:44.055,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:44.055,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 2
[00:00:44.055,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGREG?
[00:00:44.078,000] <dbg> modem_chat: modem_chat_log_received_command: +CGREG:  1 1
[00:00:44.078,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:44.078,000] <dbg> modem_chat: modem_chat_script_stop: quectel_bg95_periodic_chat_script: complete
[00:00:46.078,000] <dbg> modem_chat: modem_chat_script_start: running script: quectel_bg95_periodic_chat_script
[00:00:46.078,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 0
[00:00:46.078,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CREG?
[00:00:46.101,000] <dbg> modem_chat: modem_chat_log_received_command: +CREG:  1 2
[00:00:46.101,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:46.101,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 1
[00:00:46.101,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG?
[00:00:46.124,000] <dbg> modem_chat: modem_chat_log_received_command: +CEREG:  1 4
[00:00:46.124,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:46.124,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 2
[00:00:46.124,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGREG?
[00:00:46.146,000] <dbg> modem_chat: modem_chat_log_received_command: +CGREG:  1 1
[00:00:46.146,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:46.146,000] <dbg> modem_chat: modem_chat_script_stop: quectel_bg95_periodic_chat_script: complete
[00:00:48.147,000] <dbg> modem_chat: modem_chat_script_start: running script: quectel_bg95_periodic_chat_script
[00:00:48.147,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 0
[00:00:48.147,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CREG?
[00:00:48.169,000] <dbg> modem_chat: modem_chat_log_received_command: +CREG:  1 2
[00:00:48.169,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:48.169,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 1
[00:00:48.169,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG?
[00:00:48.192,000] <dbg> modem_chat: modem_chat_log_received_command: +CEREG:  1 4
[00:00:48.192,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:48.192,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 2
[00:00:48.192,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGREG?
[00:00:48.215,000] <dbg> modem_chat: modem_chat_log_received_command: +CGREG:  1 1

At some point, the modem starts continuously executing the periodic chat script in an endless loop:

[00:00:48.147,000] <dbg> modem_chat: modem_chat_script_start: running script: quectel_bg95_periodic_chat_script
[00:00:48.147,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 0
[00:00:48.147,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CREG?
[00:00:48.169,000] <dbg> modem_chat: modem_chat_log_received_command: +CREG:  1 2
[00:00:48.169,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:48.169,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 1
[00:00:48.169,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG?
[00:00:48.192,000] <dbg> modem_chat: modem_chat_log_received_command: +CEREG:  1 4
[00:00:48.192,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:48.192,000] <dbg> modem_chat: modem_chat_script_next: quectel_bg95_periodic_chat_script: step: 2
[00:00:48.192,000] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGREG?
[00:00:48.215,000] <dbg> modem_chat: modem_chat_log_received_command: +CGREG:  1 1
[00:00:48.215,000] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:48.215,000] <dbg> modem_chat: modem_chat_script_stop: quectel_bg95_periodic_chat_script: complete
[00:00:50.215,000] <dbg> modem_chat: modem_chat_script_start: running script: quectel_bg95_periodic_chat_script

Any guidance or suggestions on what might be causing this issue would be greatly appreciated!

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Cellular Modem Example Stuck on "L4 connected" with BG95 on STM32H573I-DK #87401

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Cellular Modem Example Stuck on "L4 connected" with BG95 on STM32H573I-DK #87401

EugeneKolesnyk Mar 20, 2025

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EugeneKolesnyk
Mar 20, 2025