Configuration for nRF54L15dk running cellular modem application and SLM on nrf9151dk board

Hello,

I am trying to configure cellular modem application running on nrf54l15dk board and SLM on nrf9151dk board.

I get the 2 boards communicating but communication seems to fail at a precise point (I suppose right after connection is successful, i.e. +CEREG: 5)

nrf54l15dk output

*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
Powering on modem
[00:00:00.433,267] <dbg> modem_cellular: modem_cellular_log_event: event resume
[00:00:00.433,306] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from idle to power pulse
Bring up network interface
Waiting for L4 connected
[00:00:00.533,343] <dbg> modem_cellular: modem_cellular_log_event: event timeout
[00:00:00.533,388] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from power pulse to await power on
[00:00:02.533,438] <dbg> modem_cellular: modem_cellular_log_event: event timeout
[00:00:02.533,505] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from await power on to run init script
[00:00:02.533,528] <dbg> modem_cellular: modem_cellular_log_event: event bus opened
[00:00:02.533,566] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_init_chat_script
[00:00:02.533,579] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 0
[00:00:02.533,593] <dbg> modem_chat: modem_chat_script_next: sending: AT
[00:00:02.547,686] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:02.547,700] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 1
[00:00:02.547,714] <dbg> modem_chat: modem_chat_script_next: sending: AT+CMEE=1
[00:00:02.562,036] <dbg> modem_chat: modem_chat_log_received_command: OK
--- 1 messages dropped ---
[00:00:02.562,054] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 2
[00:00:02.562,068] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG=1
[00:00:02.576,351] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:02.576,378] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 3
[00:00:02.576,392] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG?
[00:00:02.591,132] <dbg> modem_chat: modem_chat_log_received_command: +CEREG:  1 4
[00:00:02.591,168] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:02.591,181] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 4
[00:00:02.591,196] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGSN
[00:00:02.591,225] <dbg> modem_cellular: modem_cellular_log_event: event deregistered
[00:00:02.606,131] <dbg> modem_chat: modem_chat_log_received_command:  359404230050586
[00:00:02.606,175] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:02.606,187] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 6
[00:00:02.606,201] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGMM
[00:00:02.621,003] <dbg> modem_chat: modem_chat_log_received_command:  nRF9151-LACA
[00:00:02.621,021] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 7
[00:00:02.621,047] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:02.621,058] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 8
[00:00:02.621,073] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGMI
[00:00:02.636,140] <dbg> modem_chat: modem_chat_log_received_command:  Nordic Semiconductor ASA
[00:00:02.636,158] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 9
[00:00:02.636,215] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:02.636,228] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 10
[00:00:02.636,242] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGMR
[00:00:02.651,097] <dbg> modem_chat: modem_chat_log_received_command:  mfw_nrf91x1_2.0.1
[00:00:02.651,116] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 11
[00:00:02.651,139] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:02.651,150] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 12
[00:00:02.651,165] <dbg> modem_chat: modem_chat_script_next: sending: AT#XCMUX=1
[00:00:02.656,453] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:02.656,467] <dbg> modem_chat: modem_chat_script_stop: nordic_nrf91_slm_init_chat_script: complete
[00:00:02.656,522] <dbg> modem_cellular: modem_cellular_log_event: event script success
[00:00:02.656,727] <dbg> modem_cellular: modem_cellular_log_event: event bus closed
[00:00:02.656,764] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from run init script to connect cmux
[00:00:02.756,796] <dbg> modem_cellular: modem_cellular_log_event: event timeout
--- 2 messages dropped ---
[00:00:02.756,849] <dbg> modem_cellular: modem_cellular_log_event: event bus opened
[00:00:02.756,899] <dbg> modem_cmux: modem_cmux_log_frame: tx ch:0 cr:1 pf:1 type:SABM dlen:0
[00:00:02.756,911] <dbg> modem_cmux: modem_cmux_log_frame: data:
[00:00:02.837,243] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:0 cr:1 pf:1 type:UA dlen:0
[00:00:02.837,256] <dbg> modem_cmux: modem_cmux_log_frame: data:
[00:00:02.837,294] <dbg> modem_cellular: modem_cellular_log_event: event cmux connected
[00:00:02.837,327] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from connect cmux to open dlci1
[00:00:02.837,363] <dbg> modem_cmux: modem_cmux_log_frame: tx ch:1 cr:1 pf:1 type:SABM dlen:0
--- 3 messages dropped ---
[00:00:02.837,375] <dbg> modem_cmux: modem_cmux_log_frame: data:
[00:00:02.870,482] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:1 type:UA dlen:0
[00:00:02.870,495] <dbg> modem_cmux: modem_cmux_log_frame: data:
[00:00:02.870,533] <dbg> modem_cellular: modem_cellular_log_event: event dlci1 opened
[00:00:02.870,627] <dbg> modem_cmux: modem_cmux_log_frame: data:
[00:00:02.903,745] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:2 cr:1 pf:1 type:UA dlen:0
[00:00:02.903,758] <dbg> modem_cmux: modem_cmux_log_frame: data:
[00:00:02.903,797] <dbg> modem_cellular: modem_cellular_log_event: event dlci2 opened
[00:00:02.903,824] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from open dlci2 to run dial script
[00:00:03.003,867] <dbg> modem_cellular: modem_cellular_log_event: event timeout
[00:00:03.003,906] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
[00:00:03.003,921] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
[00:00:03.003,935] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
[00:00:03.004,041] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     0d 0a                                            |..               
[00:00:03.047,033] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:0 type:UIH dlen:6
[00:00:03.047,047] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     0d 0a 4f 4b 0d 0a                                |..OK..           
[00:00:03.047,100] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:03.047,113] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 1
[00:00:03.047,128] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=1
[00:00:03.047,175] <dbg> modem_cmux: modem_cmux_log_frame: tx ch:1 cr:1 pf:0 type:UIH dlen:9
[00:00:03.047,188] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     41 54 2b 43 46 55 4e 3d  31                      |AT+CFUN= 1       
[00:00:03.047,239] <dbg> modem_cmux: modem_cmux_log_frame: tx ch:1 cr:1 pf:0 type:UIH dlen:2
[00:00:03.047,252] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     0d 0a                                            |..               
[00:00:03.129,492] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:0 type:UIH dlen:6
[00:00:03.129,519] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     0d 0a 4f 4b 0d 0a                                |..OK..           
[00:00:03.129,573] <dbg> modem_chat: modem_chat_log_received_command: OK
[00:00:03.129,586] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 2
[00:00:03.129,600] <dbg> modem_chat: modem_chat_script_next: sending: AT#XCMUX=2
[00:00:03.129,648] <dbg> modem_cmux: modem_cmux_log_frame: tx ch:1 cr:1 pf:0 type:UIH dlen:10
[00:00:03.129,671] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     41 54 23 58 43 4d 55 58  3d 32                   |AT#XCMUX =2      
[00:00:03.129,717] <dbg> modem_cmux: modem_cmux_log_frame: tx ch:1 cr:1 pf:0 type:UIH dlen:2
[00:00:03.129,734] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     0d 0a                                            |..               
[00:00:03.163,406] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:2 cr:1 pf:0 type:UIH dlen:6
[00:00:03.163,419] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     0d 0a 4f 4b 0d 0a                                |..OK..           
[00:00:04.093,298] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:2 cr:1 pf:0 type:UIH dlen:13
[00:00:04.093,324] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     0d 0a 2b 43 45 52 45 47  3a 20 32 0d 0a          |..+CEREG : 2..   
[00:00:09.007,397] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:0 type:UIH dlen:31
[00:00:09.007,424] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     7e ff 7d 23 c0 21 7d 21  7d 21 7d 20 7d 2e 7d 21 |~.}#.!}! }!} }.}!
                                     7d 24 7d 25 7d 20 7d 22  7d 26 ff ff ff ff 9e    |}$}%} }" }&..... 
[00:00:09.007,464] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:0 type:UIH dlen:2
[00:00:09.007,476] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     83 7e                                            |.~               
[00:00:09.007,515] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:2 cr:1 pf:0 type:UIH dlen:23
[00:00:09.007,528] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     0d 0a 2b 43 4e 45 43 5f  45 53 4d 3a 20 35 30 2c |..+CNEC_ ESM: 50,
                                     30 0d 0a 0d 0a 2b 43                             |0....+C          
[00:00:09.007,567] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:2 cr:1 pf:0 type:UIH dlen:25
[00:00:09.007,580] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     45 52 45 47 3a 20 35 0d  0a 0d 0a 23 58 50 50 50 |EREG: 5. ...#XPPP
                                     3a 20 31 2c 30 2c 30 0d  0a                      |: 1,0,0. .       
[00:00:13.004,015] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
[00:00:13.004,064] <dbg> modem_cellular: modem_cellular_log_event: event script failed
[00:00:14.006,013] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:0 type:UIH dlen:31
[00:00:14.006,041] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     7e ff 7d 23 c0 21 7d 21  7d 21 7d 20 7d 2e 7d 21 |~.}#.!}! }!} }.}!
                                     7d 24 7d 25 7d 20 7d 22  7d 26 ff ff ff ff 9e    |}$}%} }" }&..... 
[00:00:14.006,081] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:0 type:UIH dlen:2
[00:00:14.006,093] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     83 7e                                            |.~               
[00:00:19.006,367] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:0 type:UIH dlen:31
[00:00:19.006,394] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     7e ff 7d 23 c0 21 7d 21  7d 21 7d 20 7d 2e 7d 21 |~.}#.!}! }!} }.}!
                                     7d 24 7d 25 7d 20 7d 22  7d 26 ff ff ff ff 9e    |}$}%} }" }&..... 
[00:00:19.006,434] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:0 type:UIH dlen:2
[00:00:19.006,446] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     83 7e                                            |.~               
[00:00:24.006,562] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:0 type:UIH dlen:31
[00:00:24.006,589] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     7e ff 7d 23 c0 21 7d 21  7d 21 7d 20 7d 2e 7d 21 |~.}#.!}! }!} }.}!
                                     7d 24 7d 25 7d 20 7d 22  7d 26 ff ff ff ff 9e    |}$}%} }" }&..... 
[00:00:24.006,630] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:0 type:UIH dlen:2
[00:00:24.006,642] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     83 7e                                            |.~               
[00:00:24.006,718] <wrn> modem_chat: receive buffer overrun
[00:00:29.006,724] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:0 type:UIH dlen:31
[00:00:29.006,751] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     7e ff 7d 23 c0 21 7d 21  7d 21 7d 20 7d 2e 7d 21 |~.}#.!}! }!} }.}!
                                     7d 24 7d 25 7d 20 7d 22  7d 26 ff ff ff ff 9e    |}$}%} }" }&..... 
[00:00:29.006,791] <dbg> modem_cmux: modem_cmux_log_frame: rcvd ch:1 cr:1 pf:0 type:UIH dlen:2
[00:00:29.006,803] <dbg> modem_cmux: modem_cmux_log_frame: data:
                                     83 7e                                            |.~
                                     
                    ............

nrf9151dk output

*** Booting nRF Connect SDK v3.1.0-6c6e5b32496e ***
*** Using Zephyr OS v4.1.99-1612683d4010 ***
[00:00:00.253,875] <inf> at_cmd_custom: Custom AT commands enabled with 44 entries.
[00:00:03.672,760] <inf> fs_nvs: 2 Sectors of 4096 bytes
[00:00:03.672,760] <inf> fs_nvs: alloc wra: 0, fe8
[00:00:03.672,790] <inf> fs_nvs: data wra: 0, 0
[00:00:03.934,417] <inf> slm: lib_modem init: 0
[00:00:03.935,058] <inf> mcuboot_util: Image index: 0, Swap type: none
[00:00:03.935,089] <inf> slm_ctrl_pin: Entering sleep.
*** Booting nRF Connect SDK v3.1.0-6c6e5b32496e ***
*** Using Zephyr OS v4.1.99-1612683d4010 ***
[00:00:00.253,875] <inf> at_cmd_custom: Custom AT commands enabled with 44 entries.
[00:00:00.260,131] <inf> fs_nvs: 2 Sectors of 4096 bytes
[00:00:00.260,162] <inf> fs_nvs: alloc wra: 0, fe8
[00:00:00.260,162] <inf> fs_nvs: data wra: 0, 0
[00:00:00.521,789] <inf> slm: lib_modem init: 0
[00:00:00.522,430] <inf> mcuboot_util: Image index: 0, Swap type: none
[00:00:00.522,460] <inf> slm: Serial LTE Modem
[00:00:00.522,521] <inf> slm_uart_handler: UART baud: 460800 d/p/s-bits: 3/0/1 HWFC: 1
[00:00:00.615,386] <inf> nrf_cloud_info: Device ID: 50344354-3837-4f9d-804c-0710238f6e58
[00:00:00.620,788] <inf> nrf_cloud_info: IMEI:      359404230050586
[00:00:00.712,432] <inf> nrf_cloud_info: UUID:      50344354-3837-4f9d-804c-0710238f6e58
[00:00:00.718,170] <inf> nrf_cloud_info: Modem FW:  mfw_nrf91x1_2.0.1
[00:00:00.718,200] <inf> nrf_cloud_info: Protocol:          MQTT
[00:00:00.718,231] <inf> nrf_cloud_info: Download protocol: HTTPS
[00:00:00.718,261] <inf> nrf_cloud_info: Sec tag:           16842753
[00:00:00.718,322] <inf> nrf_cloud_info: Host name:         mqtt.nrfcloud.com
[00:00:00.718,536] <inf> slm_at_host: at_host init done
[00:00:01.733,764] <inf> slm_cmux: CMUX started.
[00:00:01.764,068] <inf> slm_cmux: CMUX connected.
[00:00:01.797,241] <inf> slm_cmux: DLCI 1 (AT) opened.
[00:00:01.830,413] <inf> slm_cmux: DLCI 2 opened.
[00:00:08.574,615] <inf> slm_ppp: PPP PDN (0) activated.
[00:00:08.575,012] <inf> slm_ppp: PPP start, reason: 0
[00:00:08.579,193] <inf> slm_ppp: PPP socket bound to PDN 0
[00:00:08.580,566] <inf> slm_ppp: PPP start succeeded.

I am using SDK and toolchain v3.1.0 (you can get commit from the log)

This is the configuration I am using for cellular modem:

myproj.conf

# UART Configuration
CONFIG_NRFX_UARTE22=y
CONFIG_UART_ASYNC_API=y
CONFIG_UART_22_ASYNC=y
CONFIG_UART_22_INTERRUPT_DRIVEN=n

# Align with the Serial LTE Modem (SLM) application.
CONFIG_MODEM_CMUX_WORK_BUFFER_SIZE=1500
CONFIG_MODEM_CELLULAR_UART_BUFFER_SIZES=6000

# Prevent sockets getting offloaded to the modem.
CONFIG_NET_SOCKETS_OFFLOAD=y

# Print logs and printk() output on uart0.
CONFIG_LOG_BACKEND_UART=n

CONFIG_MODEM_LOG_LEVEL_DBG=y

# Disable AT shell as SLM application has no AT mode user pipes
CONFIG_MODEM_AT_SHELL=n

# GPIO Configuration
CONFIG_GPIO=y

myoverlay.overlay

/ {
    aliases {
        modem = &modem;
    };
};

&uart22 {
    compatible = "nordic,nrf-uarte";
    status = "okay";
    current-speed = <460800>;
    hw-flow-control;
    pinctrl-0 = <&uart22_default>;
    pinctrl-1 = <&uart22_sleep>;
    pinctrl-names = "default", "sleep";
    modem: modem {
        compatible = "nordic,nrf91-slm";
        status = "okay";
        mdm-power-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
    };
};

&dppic00 {
    status = "okay";
};

&gpio1 {
    status = "okay";
};

&gpio0 {
    status = "okay";
};

&gpio2 {
    status = "okay";
};

&gpiote20 {
    status = "okay";
};

&gpiote30 {
    status = "okay";
};


&pinctrl {
    /omit-if-no-ref/ uart22_default: uart22_default {
        group1 {
            psels = <NRF_PSEL(UART_TX, 1, 12)>,
                    <NRF_PSEL(UART_RTS, 1, 13)>;
        };
        group2 {
            psels = <NRF_PSEL(UART_RX, 1, 11)>,
                    <NRF_PSEL(UART_CTS, 1, 14)>;
            bias-pull-up;
        };
    };

    /omit-if-no-ref/ uart22_sleep: uart22_sleep {
        group1 {
            psels = <NRF_PSEL(UART_TX, 1, 12)>,
                    <NRF_PSEL(UART_RX, 1, 11)>,
                    <NRF_PSEL(UART_RTS, 1, 13)>,
                    <NRF_PSEL(UART_CTS, 1, 14)>;
            low-power-enable;
        };
    };
};

for slm (-- -DEXTRA_CONF_FILE="overlay-cmux.conf;overlay-ppp.conf;overlay-zephyr-modem.conf;boards/nrf9151dk_nrf9151_ns_cityz.conf" -DEXTRA_DTC_OVERLAY_FILE=boards/nrf9151dk_nrf9151_ns_cityz.overlay )

overlay-cmux.conf

#
# Copyright (c) 2023 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

CONFIG_SLM_CMUX=y
CONFIG_SLM_SKIP_READY_MSG=y

# Zephyr modem subsystem
CONFIG_MODEM_MODULES=y
CONFIG_MODEM_CMUX=y

# Enable SLM UART backend
CONFIG_MODEM_BACKEND_UART=n
CONFIG_MODEM_BACKEND_UART_ASYNC=n
CONFIG_MODEM_BACKEND_UART_SLM=y
CONFIG_MODEM_BACKEND_UART_SLM_TRANSMIT_TIMEOUT_MS=1000

# debug options
#CONFIG_MODEM_CMUX_LOG_LEVEL_DBG=y
#CONFIG_MODEM_MODULES_LOG_LEVEL_DBG=y

overlay-ppp.conf

#
# Copyright (c) 2023 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

CONFIG_SLM_PPP=y

# When using PPP, disable commands of IP-based protocols to save flash space.
CONFIG_SLM_FTPC=n
CONFIG_SLM_TFTPC=n
CONFIG_SLM_HTTPC=n
CONFIG_SLM_MQTTC=n

# NCS modem libraries
CONFIG_PDN=y
CONFIG_AT_CMD_CUSTOM=y

CONFIG_NRF_MODEM_LIB_SHMEM_TX_SIZE=22528

# Zephyr PPP support
CONFIG_NET_NATIVE=y
CONFIG_NET_L2_PPP=y
CONFIG_MODEM_MODULES=y
CONFIG_MODEM_PPP=y

# Enable SLM UART backend
CONFIG_MODEM_BACKEND_UART=n
CONFIG_MODEM_BACKEND_UART_ASYNC=n
CONFIG_MODEM_BACKEND_UART_SLM=y
CONFIG_MODEM_BACKEND_UART_SLM_TRANSMIT_TIMEOUT_MS=1000

# L2 protocol
CONFIG_NET_L2_PPP_MGMT=y
CONFIG_NET_L2_PPP_OPTION_MRU=y
CONFIG_NET_L2_PPP_OPTION_SERVE_IP=y
CONFIG_NET_L2_PPP_OPTION_SERVE_DNS=y
CONFIG_NET_L2_PPP_TIMEOUT=5000
CONFIG_NET_L2_PPP_MAX_CONFIGURE_REQ_RETRANSMITS=20

# IP stack
CONFIG_NET_IP_ADDR_CHECK=n
CONFIG_NET_SOCKETS_PACKET=y

# network buffering
CONFIG_NET_BUF=y
CONFIG_NET_BUF_POOL_USAGE=y
CONFIG_NET_PKT_RX_COUNT=44
CONFIG_NET_BUF_RX_COUNT=88
CONFIG_NET_PKT_TX_COUNT=44
CONFIG_NET_BUF_TX_COUNT=88
CONFIG_NET_TC_RX_COUNT=0
CONFIG_NET_CONN_PACKET_CLONE_TIMEOUT=1000

# debug options
#CONFIG_LOG_PROCESS_THREAD_STACK_SIZE=4096
#CONFIG_NET_LOG=y
#CONFIG_NET_IF_LOG_LEVEL_DBG=y
#CONFIG_NET_PKT_LOG_LEVEL_DBG=y
#CONFIG_NET_L2_PPP_LOG_LEVEL_DBG=y
#CONFIG_NET_MGMT_EVENT_LOG_LEVEL_DBG=y
#CONFIG_MODEM_MODULES_LOG_LEVEL_DBG=y
#CONFIG_UART_LOG_LEVEL_DBG=y

overlay-zephyr-modem.conf

#
# Copyright (c) 2024 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

# The nRF91 is power-managed by Zephyr's modem_cellular driver running on the other chip.
CONFIG_SLM_START_SLEEP=y

# Compatibility with cellular modem driver.
CONFIG_SLM_MODEM_CELLULAR=y

oards/nrf9151dk_nrf9151_ns_cityz.conf

#
# Copyright (c) 2024 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

# Configuration file for nRF9151DK.
# This file is merged with prj.conf in the application folder, and options
# set here will take precedence if they are present in both files.

# When working with PC terminal, unmask the following config.
# CONFIG_SLM_POWER_PIN=8
# CONFIG_SLM_INDICATE_PIN=0

# When working with external MCU, unmask the following config.
CONFIG_SLM_POWER_PIN=14
# CONFIG_SLM_INDICATE_PIN=-1

boards/nrf9151dk_nrf9151_ns_cityz.overlay

/*
 * Copyright (c) 2024 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */

 / {
	chosen {
		ncs,slm-uart = &uart2;
	};
};

&uart0 {
	status = "disabled";
	hw-flow-control;
};

&uart2 {
	compatible = "nordic,nrf-uarte";
	current-speed = <460800>;
	status = "okay";
	hw-flow-control;

	pinctrl-0 = <&uart2_default_alt>;
	pinctrl-1 = <&uart2_sleep_alt>;
	pinctrl-names = "default", "sleep";
};

&i2c2 {
	status = "disabled";
};


/* Enable external flash */
&gd25wb256 {
	status = "disabled";
};

&spi3 {
	status = "disabled";
};

&pinctrl {
	uart2_default_alt: uart2_default_alt {
		group1 {
			psels = <NRF_PSEL(UART_RX, 0, 11)>,
				<NRF_PSEL(UART_CTS, 0, 13)>;
			bias-pull-up;
		};
		group2 {
			psels = <NRF_PSEL(UART_TX, 0, 10)>,
				<NRF_PSEL(UART_RTS, 0, 12)>;
		};
	};

	uart2_sleep_alt: uart2_sleep_alt {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 10)>,
				<NRF_PSEL(UART_RX, 0, 11)>,
				<NRF_PSEL(UART_RTS, 0, 12)>,
				<NRF_PSEL(UART_CTS, 0, 13)>;
			low-power-enable;
		};
	};
};

What can be the issue? Can you support me or can you providing a working setup?

Thank you very much!

Alessandro

Parents Reply Children
  • Hello Kazi,

    I have tried to apply the changes you suggested, here is a list of things I have tried so far:

    - ncs v2.9.0 I use for cellular communication does not support the config you suggested to add, for this reason I moved to ncs v3.1.0

    - added config you suggested and reduced baud rate but the result is the following:

    nrf91

    ** Booting nRF Connect SDK v3.1.0-6c6e5b32496e ***
    *** Using Zephyr OS v4.1.99-1612683d4010 ***
    [00:00:00.253,845] <inf> at_cmd_custom: Custom AT commands enabled with 44 entries.
    [00:00:00.260,040] <inf> fs_nvs: 2 Sectors of 4096 bytes
    [00:00:00.260,040] <inf> fs_nvs: alloc wra: 0, fe8
    [00:00:00.260,070] <inf> fs_nvs: data wra: 0, 0
    [00:00:00.526,489] <inf> slm: lib_modem init: 0
    [00:00:00.527,069] <inf> mcuboot_util: Image index: 0, Swap type: none
    [00:00:00.527,099] <inf> slm: Serial LTE Modem
    [00:00:00.527,160] <inf> slm_uart_handler: UART baud: 115200 d/p/s-bits: 3/0/1 HWFC: 1
    [00:00:00.620,880] <inf> nrf_cloud_info: Device ID: 50344354-3837-4f9d-804c-0710238f6e58
    [00:00:00.626,190] <inf> nrf_cloud_info: IMEI:      359404230050586
    [00:00:00.718,627] <inf> nrf_cloud_info: UUID:      50344354-3837-4f9d-804c-0710238f6e58
    [00:00:00.724,243] <inf> nrf_cloud_info: Modem FW:  mfw_nrf91x1_2.0.4
    [00:00:00.724,273] <inf> nrf_cloud_info: Protocol:          MQTT
    [00:00:00.724,304] <inf> nrf_cloud_info: Download protocol: HTTPS
    [00:00:00.724,334] <inf> nrf_cloud_info: Sec tag:           16842753
    [00:00:00.724,365] <inf> nrf_cloud_info: Host name:         mqtt.nrfcloud.com
    [00:00:00.724,639] <inf> slm_at_host: at_host init done
    [00:00:01.805,786] <inf> slm_cmux: CMUX started.
    [00:00:01.836,578] <inf> slm_cmux: CMUX connected.
    [00:00:01.877,471] <inf> slm_cmux: DLCI 1 (AT) opened.
    [00:00:01.918,365] <inf> slm_cmux: DLCI 2 opened.
    [00:00:04.669,647] <inf> slm_ppp: PPP PDN (0) activated.
    [00:00:04.669,769] <inf> slm_ppp: PPP start, reason: 0
    [00:00:04.773,315] <inf> slm_ppp: PPP socket bound to PDN 0
    [00:00:04.774,475] <inf> slm_ppp: PPP start succeeded


    nrf54 (last lines are always repeated)
    *** Booting nRF Connect SDK v3.1.0-6c6e5b32496e ***
    *** Using Zephyr OS v4.1.99-1612683d4010 ***
    Powering on modem
    [00:00:00.003,605] <dbg> modem_cellular: modem_cellular_log_event: event resume
    [00:00:00.003,642] <
    uart:~$ dbg> modem_cellular: modem_cellular_log_state_changed: switch from idle to power pulse
    Bring up network interface
    Waiting for L4 connected
    [00:00:00.003,642] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from idle to power pulse
    Bring up network interface
    Waiting for L4 connected
    uart:~$ [00:00:00.103,680] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:00.103,723] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from power pulse to await power on
    [00:00:00.103,680] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:00.103,723] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from power pulse to await power on
    uart:~$ [00:00:02.103,775] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:02.103,837] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from await power on to run init script
    [00:00:02.103,858] <dbg> modem_cellular: modem_cellular_log_event: event bus opened
    [00:00:02.103,893] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_init_chat_script
    [00:00:02.103,905] <dbg> mo[00:00:02.103,775] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:02.103,837] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from await power on to run init script
    [00:00:02.103,858] <dbg> modem_cellular: modem_cellular_log_event: event bus opened
    [00:00:02.103,893] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_init_chat_script
    uart:~$ : modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 0
    --- 2 messages dropped ---
    [00:00:02.123,099] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 1
    --- 6 messages dropped ---
    [00:00:02.163,431] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG?
    [00:00:02.184,929] <dbg> modem_chat: modem_chat_log_receive--- 8 messages dropped ---
    [00:00:02.103,905] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 0
    [00:00:02.123,099] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 1
    [00:00:02.163,431] <dbg> modem_chat: modem_chat_script_next: sending: AT+CEREG?
    uart:~$ d: +CEREG:  1 4
    --- 9 messages dropped ---
    [00:00:02.227,775] <dbg> modem_chat: modem_chat_log_received_command:  nRF9151-LACA
    [00:00:02.227,793] <dbg> modem_chat: modem_chat_script_next: nordi--- 9 messages dropped ---
    [00:00:02.184,929] <dbg> modem_chat: modem_chat_log_received_command: +CEREG:  1 4
    [00:00:02.227,775] <dbg> modem_chat: modem_chat_log_received_command:  nRF9151-LACA
    uart:~$ slm_init_chat_script: step: 7
    [00:00:02.227,817] <dbg> modem_chat: modem_chat_log_received_command: OK
    [00:00:02.227,838] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 8
    [00:00:02.227,793] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 7
    [00:00:02.227,817] <dbg> modem_chat: modem_chat_log_received_command: OK
    [00:00:02.227,838] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 8
    uart:~$ [00:00:02.227,855] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGMI
    [00:00:02.250,123] <dbg> modem_chat: modem_chat_log_received_command:  Nordic Semiconductor ASA
    [00:00:02.250,145] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 9
    [00:00:02.250,194] <dbg> modem_cha[00:00:02.227,855] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGMI
    [00:00:02.250,123] <dbg> modem_chat: modem_chat_log_received_command:  Nordic Semiconductor ASA
    [00:00:02.250,145] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 9
    uart:~$ _chat_log_received_command: OK
    [00:00:02.250,210] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 10
    [00:00:02.250,227] <dbg> modem_chat: modem_chat_script_next: sending:[00:00:02.250,194] <dbg> modem_chat: modem_chat_log_received_command: OK
    [00:00:02.250,210] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 10
    uart:~$ 
    [00:00:02.271,869] <dbg> modem_chat: modem_chat_log_received_command:  mfw_nrf91x1_2.0.4
    [00:00:02.271,895] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 11
    [00:0[00:00:02.250,227] <dbg> modem_chat: modem_chat_script_next: sending: AT+CGMR
    [00:00:02.271,869] <dbg> modem_chat: modem_chat_log_received_command:  mfw_nrf91x1_2.0.4
    [00:00:02.271,895] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 11
    uart:~$ ,923] <dbg> modem_chat: modem_chat_log_received_command: OK
    [00:00:02.271,953] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 12
    [00:00:02.271,977] <dbg> modem_chat:[00:00:02.271,923] <dbg> modem_chat: modem_chat_log_received_command: OK
    [00:00:02.271,953] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_init_chat_script: step: 12
    uart:~$ hat_script_next: sending: AT#XCMUX=1
    [00:00:02.285,861] <dbg> modem_chat: modem_chat_log_received_command: OK
    [00:00:02.285,882] <dbg> modem_chat: modem_chat_script_stop: nordic_nrf91_slm_init_chat_script:[00:00:02.271,977] <dbg> modem_chat: modem_chat_script_next: sending: AT#XCMUX=1
    [00:00:02.285,861] <dbg> modem_chat: modem_chat_log_received_command: OK
    uart:~$ e
    [00:00:02.285,932] <dbg> modem_cellular: modem_cellular_log_event: event script success
    [00:00:02.286,531] <dbg> modem_cellular: modem_cellular_log_event: event bus closed
    [00:00:02.286,563] <db[00:00:02.285,882] <dbg> modem_chat: modem_chat_script_stop: nordic_nrf91_slm_init_chat_script: complete
    [00:00:02.285,932] <dbg> modem_cellular: modem_cellular_log_event: event script success
    [00:00:02.286,531] <dbg> modem_cellular: modem_cellular_log_event: event bus closed
    uart:~$ _cellular: modem_cellular_log_state_changed: switch from run init script to connect cmux
    [00:00:02.386,609] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:02.386,660] <dbg> modem_cell[00:00:02.286,563] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from run init script to connect cmux
    [00:00:02.386,609] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    uart:~$ dem_cellular_log_event: event bus opened
    [00:00:02.466,929] <dbg> modem_cellular: modem_cellular_log_event: event cmux connected
    [00:00:02.466,960] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from conne[00:00:02.386,660] <dbg> modem_cellular: modem_cellular_log_event: event bus opened
    [00:00:02.466,929] <dbg> modem_cellular: modem_cellular_log_event: event cmux connected
    uart:~$ to open dlci1
    [00:00:02.507,811] <dbg> modem_cellular: modem_cellular_log_event: event dlci1 opened
    [00:00:02.507,842] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from open dlci1 to op[00:00:02.466,960] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from connect cmux to open dlci1
    [00:00:02.507,811] <dbg> modem_cellular: modem_cellular_log_event: event dlci1 opened
    uart:~$ 0m
    [00:00:02.548,713] <dbg> modem_cellular: modem_cellular_log_event: event dlci2 opened
    [00:00:02.548,747] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from open dlci2 to run dial script
    [00:00:02.507,842] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from open dlci1 to open dlci2
    [00:00:02.548,713] <dbg> modem_cellular: modem_cellular_log_event: event dlci2 opened
    [00:00:02.548,747] <dbg> modem_cellular: modem_cellular_log_state_changed: switch from open dlci2 to run dial script
    uart:~$ :02.648,800] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:02.648,834] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    [00:00:02.648,[00:00:02.648,800] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:02.648,834] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    uart:~$ g> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:00:02.648,860] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    [00:00:02.697,331] <dbg> modem_chat: modem_[00:00:02.648,846] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:00:02.648,860] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    uart:~$ _received_command: OK
    [00:00:02.697,346] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 1
    [00:00:02.697,360] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=1
    [00:00:02.697,331] <dbg> modem_chat: modem_chat_log_received_command: OK
    [00:00:02.697,346] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 1
    [00:00:02.697,360] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=1
    uart:~$ 0:00:02.771,207] <dbg> modem_chat: modem_chat_log_received_command: OK
    [00:00:02.771,221] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 2
    [00:00:02.771,235] <dbg> m[00:00:02.771,207] <dbg> modem_chat: modem_chat_log_received_command: OK
    [00:00:02.771,221] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 2
    uart:~$ t: modem_chat_script_next: sending: AT#XCMUX=2
    [00:00:02.771,235] <dbg> modem_chat: modem_chat_script_next: sending: AT#XCMUX=2
    uart:~$ [00:00:12.648,944] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:00:12.648,988] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    [00:00:12.648,944] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:00:12.648,988] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    uart:~$ [00:00:14.649,087] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:14.649,132] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    [00:00:14.6[00:00:14.649,087] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:14.649,132] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    uart:~$ [0m<dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:00:14.649,160] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    [00:00:14.649,146] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:00:14.649,160] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    uart:~$ [00:00:24.649,232] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:00:24.649,276] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    [00:00:24.649,232] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:00:24.649,276] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    uart:~$ [00:00:26.649,375] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:26.649,421] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    [00:00:26.6[00:00:26.649,375] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:26.649,421] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    uart:~$ [0m<dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:00:26.649,447] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    [00:00:26.649,433] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:00:26.649,447] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    uart:~$ [00:00:36.649,520] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:00:36.649,564] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    [00:00:36.649,520] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:00:36.649,564] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    uart:~$ [00:00:38.649,663] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:38.649,708] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    [00:00:38.6[00:00:38.649,663] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:38.649,708] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    uart:~$ [0m<dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:00:38.649,735] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    [00:00:38.649,721] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:00:38.649,735] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    uart:~$ [00:00:48.649,809] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:00:48.649,852] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    [00:00:48.649,809] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:00:48.649,852] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    uart:~$ [00:00:50.649,949] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:50.649,994] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    [00:00:50.6[00:00:50.649,949] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:00:50.649,994] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    uart:~$ [0m<dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:00:50.650,021] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    [00:00:50.650,007] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:00:50.650,021] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    uart:~$ [00:01:00.650,096] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:01:00.650,140] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    [00:01:00.650,096] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:01:00.650,140] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    uart:~$ [00:01:02.650,239] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:01:02.650,284] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    [00:01:02.6[00:01:02.650,239] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:01:02.650,284] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    uart:~$ [0m<dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:01:02.650,310] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    [00:01:02.650,297] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:01:02.650,310] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    uart:~$ [00:01:12.650,385] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:01:12.650,428] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    [00:01:12.650,385] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:01:12.650,428] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    uart:~$ [00:01:14.650,527] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:01:14.650,574] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    [00:01:14.6[00:01:14.650,527] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:01:14.650,574] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    uart:~$ [0m<dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:01:14.650,600] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    [00:01:14.650,586] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:01:14.650,600] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    uart:~$ [00:01:24.650,672] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:01:24.650,716] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    [00:01:24.650,672] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:01:24.650,716] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    uart:~$ [00:01:26.650,815] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:01:26.650,861] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    [00:01:26.6[00:01:26.650,815] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:01:26.650,861] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    uart:~$ [0m<dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:01:26.650,887] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    [00:01:26.650,873] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:01:26.650,887] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    uart:~$ [00:01:36.650,960] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:01:36.651,004] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    [00:01:36.650,960] <wrn> modem_chat: nordic_nrf91_slm_dial_chat_script: timed out
    [00:01:36.651,004] <dbg> modem_cellular: modem_cellular_log_event: event script failed
    uart:~$ [00:01:38.651,103] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:01:38.651,148] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    [00:01:38.6[00:01:38.651,103] <dbg> modem_cellular: modem_cellular_log_event: event timeout
    [00:01:38.651,148] <dbg> modem_chat: modem_chat_script_start: running script: nordic_nrf91_slm_dial_chat_script
    uart:~$ [0m<dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:01:38.651,175] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4
    [00:01:38.651,161] <dbg> modem_chat: modem_chat_script_next: nordic_nrf91_slm_dial_chat_script: step: 0
    [00:01:38.651,175] <dbg> modem_chat: modem_chat_script_next: sending: AT+CFUN=4


    What do you think I could try?

    Thank you

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