# Hl7812 kudpsnd no carrier issue **URL:** \ **Category:** Legacy HL Series\ **Created:** [July 7, 2024, 1:02pm UTC](https://forum.sierrawireless.com/t/hl7812-kudpsnd-no-carrier-issue/32711 "2024-07-07T13:02:19Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![zsen](https://avatars.discourse-cdn.com/v4/letter/z/b487fb/32.png) [@zsen](https://forum.sierrawireless.com/u/zsen)\ **Post date:** [July 7, 2024, 1:02pm UTC](https://forum.sierrawireless.com/t/hl7812-kudpsnd-no-carrier-issue/32711/1 "2024-07-07T13:02:19Z")
Hi, HL7812.5 .5.8.0-23.10.0.F reeRTOS.w41 is the modem and sw version. [AT+KUDPSND=1,“10.105.16.254”,53,64] is started returning NO CARRIER error after connect print. I was running a dns resolution app without this problem previously. Any idea what may have caused this issue? I am running the same application on the other boards which have the same configs without problems. Here are the logs: ```auto [00:01:53.327,000] modem_hl7812: send_at_cmd: OUT: [AT+KUDPCFG?] [00:01:53.327,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET01: 0 +KUDPCFG: 1,1,0,4184,0,"",0,0,1,0,3 [00:01:53.336,000] modem_hl7812: hl7812_rx: HANDLE +KUDPCFG: (len:25) [00:01:53.336,000] modem_hl7812: on_cmd_sockcreate: +KUDPCFG: 1 [00:01:53.336,000] modem_hl7812: on_cmd_sockcreate: look up new socket by creation id OK [00:01:53.337,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) [00:01:53.337,000] modem_hl7812: send_at_cmd: reset iface_ctx.response_sem: 0 [00:01:53.337,000] modem_hl7812: send_at_cmd: OUT: [AT+CGCONTRDP=1] [00:01:53.338,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET01: 0 +CGCONTRDP: 1,5,"netxxadsada,10.149.38.235.255.255.255.248,10.149.38.233,10.105.16.254,10.105.144.254,,,, [00:01:53.351,000] modem_hl7812: hl7812_rx: HANDLE +CGCONTRDP: (len:121) [00:01:53.351,000] modem_hl7812: on_cmd_atcmdinfo_ipaddr: IP info: 121 1,5,"net",10.149.38.235.255.255.255.248,10.149.38.233,10.105.16.254,10.105.144.254,,,,,,,,, [00:01:53.351,000] modem_hl7812: on_cmd_atcmdinfo_ipaddr: IP string len: 30 [00:01:53.352,000] modem_hl7812: on_cmd_atcmdinfo_ipaddr: IP addr: 10.149.38.235 [00:01:53.352,000] modem_hl7812: on_cmd_atcmdinfo_ipaddr: IPv4 DNS addr: 10.105.16.254 OK [00:01:55.456,000] modem_hl7812: send_at_cmd: OUT: [AT+KUDPSND=1,"10.105.16.254",53,64] CONNECT [00:01:55.470,000] modem_hl7812: hl7812_rx: HANDLE CONNECT (len:0) [00:01:55.546,000] modem_hl7812: send_data: Sent 64 bytes NO CARRIER [00:01:55.556,000] modem_hl7812: hl7812_rx: HANDLE NO CARRIER (len:0) 00:01:55.556,000] aws_iot_: getaddrinfo, error -11 [00:01:55.556,000] aws_iot client_broker_init, error: -10 +KUDP_NOTIF: 1,8 [00:01:55.558,000] modem_hl7812: hl7812_netfeasa_rx: HANDLE +KUDP_NOTIF: (len:3) [00:01:55.558,000] modem_hl7812: +K**P_NOTIF: 1,8 ``` ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [July 7, 2024, 2:30pm UTC](https://forum.sierrawireless.com/t/hl7812-kudpsnd-no-carrier-issue/32711/2 "2024-07-07T14:30:20Z")
Can you paste the ok log for comparison ---
**Author:** ![zsen](https://avatars.discourse-cdn.com/v4/letter/z/b487fb/32.png) [@zsen](https://forum.sierrawireless.com/u/zsen)\ **Post date:** [July 7, 2024, 2:46pm UTC](https://forum.sierrawireless.com/t/hl7812-kudpsnd-no-carrier-issue/32711/3 "2024-07-07T14:46:22Z")
Hi @jyijyi here it is ```auto [00:01:54.612,000] modem_hl7812: send_at_cmd: OUT: [AT+KUDPSND=1,"10.105.16.254",53,64] CONNECT [00:01:54.627,000] modem_hl7812: hl7812_rx: HANDLE CONNECT (len:0) [00:01:54.704,000] modem_hl7812: send_data: Sent 64 bytes OK [00:01:54.711,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) [00:01:54.711,000] modem_hl7812: allow_sleep: Keep sleep +KUDP_DATA: 1,192 [00:01:55.422,000] modem_hl7812: hl7812_rx: HANDLE +KUDP_DATA: (len:5) [00:01:55.422,000] modem_hl7812: allow_sleep: Keep awake [00:01:55.422,000] modem_hl7812: allow_sleep_with_timeout: Keep awake [00:01:55.422,000] modem_hl7812: is_cmd_ready: 265 LOWPOWER VGPIO:1 GPIO6:1 UART_CTS:0 [00:01:55.422,000] modem_hl7812: start_socket_rx: Start socket RX ID:1 size:192 [00:01:55.422,000] modem_hl7812: send_at_cmd: OUT: [AT+KUDPRCV=1,192] CONNECT [00:01:55.433,000] modem_hl7812: hl7812_rx: HANDLE CONNECT (len:0) [00:01:55.433,000] modem_hl7812: sock_read: Socket 1 RX 192 bytes [00:01:55.433,000] modem_hl7812: wait_for_modem_data: cur:0, exp:1 [00:01:55.483,000] modem_hl7812: sock_read: Processing RX, buf len: 234 [00:01:55.483,000] modem_hl7812: sock_read: Got all data, get EOF and OK (buf len:42) [00:01:55.484,000] modem_hl7812: sock_read: Sock 1 RX done [00:01:55.484,000] modem_hl7812: allow_sleep: Keep sleep +KUDP_RCV: "10.105.16.254",53 ``` ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [July 7, 2024, 3:22pm UTC](https://forum.sierrawireless.com/t/hl7812-kudpsnd-no-carrier-issue/32711/4 "2024-07-07T15:22:10Z")
did you compare AT+KUDPCFG? and AT+CGCONTRDP=1? have you tried to swap the SIM card? ---
**Author:** ![zsen](https://avatars.discourse-cdn.com/v4/letter/z/b487fb/32.png) [@zsen](https://forum.sierrawireless.com/u/zsen)\ **Post date:** [July 7, 2024, 3:34pm UTC](https://forum.sierrawireless.com/t/hl7812-kudpsnd-no-carrier-issue/32711/5 "2024-07-07T15:34:01Z")
> did you compare AT+KUDPCFG? and AT+CGCONTRDP=1? Yes, that part is the same for both, thats why i didnt share it I swapped the sim card as well, but the issue still exists. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [July 7, 2024, 3:41pm UTC](https://forum.sierrawireless.com/t/hl7812-kudpsnd-no-carrier-issue/32711/6 "2024-07-07T15:41:23Z")
how about just send 1 byte instead of 64 bytes? Is it the same for TCP connection? ---
**Author:** ![zsen](https://avatars.discourse-cdn.com/v4/letter/z/b487fb/32.png) [@zsen](https://forum.sierrawireless.com/u/zsen)\ **Post date:** [July 7, 2024, 3:47pm UTC](https://forum.sierrawireless.com/t/hl7812-kudpsnd-no-carrier-issue/32711/7 "2024-07-07T15:47:14Z")
I just wanted to share logs for both cases (failure and success) again: Succesfull connection on another board: ```auto [00:01:59.614,000] modem_hl7812: send_at_cmd: OUT: [AT+KCNXCFG=1,"GPRS","",,,"IPV4V6"] [00:01:59.617,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET01: 0 OK [00:01:59.634,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) [00:01:59.634,000] modem_hl7812: send_at_cmd: reset iface_ctx.response_sem: 0 [00:01:59.634,000] modem_hl7812: send_at_cmd: OUT: [AT+KTCPCFG?] [00:01:59.635,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET01: 0 OK [00:01:59.640,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) [00:01:59.640,000] modem_hl7812: send_at_cmd: reset iface_ctx.response_sem: 0 [00:01:59.640,000] modem_hl7812: send_at_cmd: OUT: [AT+KUDPCFG?] [00:01:59.641,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET01: 0 OK [00:01:59.646,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) [00:01:59.646,000] modem_hl7812: send_at_cmd: reset iface_ctx.response_sem: 0 [00:01:59.646,000] modem_hl7812: send_at_cmd: OUT: [AT+CGCONTRDP=1] [00:01:59.647,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET01: 0 +CGCONTRDP: 1,5,"net",10.149.39.65.255.255.255.252,10.149.39.66,10.105.16.254,10.105.144.254,,,,,, [00:01:59.660,000] modem_hl7812: hl7812_rx: HANDLE +CGCONTRDP: (len:119) [00:01:59.660,000] modem_hl7812: on_cmd_atcmdinfo_ipaddr: IP info: 119 1,5,"net",10.149.39.65.255.255.255.252,10.149.39.66,10.105.16.254,10.105.144.254,,,,,,,,, [00:01:59.660,000] modem_hl7812: on_cmd_atcmdinfo_ipaddr: IP string len: 29 [00:01:59.660,000] modem_hl7812: on_cmd_atcmdinfo_ipaddr: IP addr: 10.149.39.65 [00:01:59.660,000] modem_hl7812: on_cmd_atcmdinfo_ipaddr: IPv4 DNS addr: 10.105.16.254 OK [00:01:59.661,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) [00:02:01.661,000] modem_hl7812: send_at_cmd: OUT: [AT+KUDPCFG=1,0,,,,,0,0] [00:02:01.663,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET11: 0 +KUDPCFG: 1 [00:02:01.698,000] modem_hl7812: hl7812_rx: HANDLE +KUDPCFG: (len:1) [00:02:01.698,000] modem_hl7812: on_cmd_sockcreate: +KUDPCFG: 1 [00:02:01.698,000] modem_hl7812: on_cmd_sockcreate: look up new socket by creation id OK [00:02:01.699,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) +KCNX_IND: 1,1,0 [00:02:01.717,000] modem_hl7812: hl7812_rx: HANDLE +KCNX_IND: (len:5) [00:02:01.717,000] modem_hl7812: on_cmd_kcnx_ind: CNX_CNF: 1, STATUS: 1 [00:02:01.717,000] modem_hl7812: Connected with AF: 0 +KUDP_IND: 1,1 [00:02:02.733,000] modem_hl7812: hl7812_rx: HANDLE +KUDP_IND: (len:3) [00:02:02.733,000] modem_hl7812: on_cmd_sock_ind: +KUDP_IND ID: 1 [00:02:02.733,000] modem_hl7812: allow_sleep: Keep sleep [00:02:02.733,000] modem_hl7812: offload_bind: offload_bind [00:02:02.733,000] modem_hl7812: dns_work_cb: DNS ready [00:02:02.733,000] modem_module: pdn_event_handler: PDN_EVENT_ACTIVATED [00:02:02.733,000] LTE_HL7812: iface_ready_evt_handler: LTE is ready! [00:02:02.733,000] modem_module: pdn_event_handler: PDN_EVENT_ACTIVATED [00:02:02.734,000] LTE_HL7812: iface_ready_evt_handler: LTE is ready! [00:02:02.734,000] modem_module: state_set: State transition STATE_DISCONNECTED --> STATE_CONNECTED [00:02:02.734,000] cloud_module: state_set: State transition STATE_LTE_DISCONNECTED --> STATE_LTE_CONNECTED [00:02:02.734,000] cloud_module: connect_cloud: Connecting to cloud [00:02:02.734,000] cloud_module: CLOUD CONNECT RETRIES: 0 [00:02:02.734,000] cloud_module: connect_cloud: Cloud connection establishment in progress [00:02:02.734,000] cloud_module: connect_cloud: New connection attempt in 32 seconds if not successful [00:02:02.853,000] aws_iot_integration: aws_iot_event_handler: AWS_IOT_EVT_CONNECTING [00:02:02.853,000] cloud_module: cloud_wrap_event_handler: CLOUD_WRAP_EVT_CONNECTING [00:02:02.854,000] modem_hl7812: offload_recv: offload_recv [00:02:02.854,000] modem_hl7812: offload_sendto: offload_sendto [00:02:02.854,000] modem_hl7812: allow_sleep: Keep awake [00:02:02.854,000] modem_hl7812: allow_sleep_with_timeout: Keep awake [00:02:02.854,000] modem_hl7812: is_cmd_ready: 265 LOWPOWER VGPIO:1 GPIO6:1 UART_CTS:0 [00:02:02.854,000] modem_hl7812: send_at_cmd: OUT: [AT+KUDPSND=1,"10.105.16.254",53,64] CONNECT [00:02:02.869,000] modem_hl7812: hl7812_rx: HANDLE CONNECT (len:0) [00:02:02.945,000] modem_hl7812: send_data: Sent 64 bytes OK [00:02:02.952,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) [00:02:02.952,000] modem_hl7812: allow_sleep: Keep sleep +KUDP_DATA: 1,192 [00:02:03.772,000] modem_hl7812: hl7812_rx: HANDLE +KUDP_DATA: (len:5) [00:02:03.772,000] modem_hl7812: allow_sleep: Keep awake [00:02:03.772,000] modem_hl7812: allow_sleep_with_timeout: Keep awake [00:02:03.772,000] modem_hl7812: is_cmd_ready: 265 LOWPOWER VGPIO:1 GPIO6:1 UART_CTS:0 [00:02:03.772,000] modem_hl7812: start_socket_rx: Start socket RX ID:1 size:192 [00:02:03.772,000] modem_hl7812: send_at_cmd: OUT: [AT+KUDPRCV=1,192] CONNECT [00:02:03.783,000] modem_hl7812: hl7812_rx: HANDLE CONNECT (len:0) [00:02:03.783,000] modem_hl7812: sock_read: Socket 1 RX 192 bytes [00:02:03.783,000] modem_hl7812: wait_for_modem_data: cur:0, exp:1 [00:02:03.833,000] modem_hl7812: sock_read: Processing RX, buf len: 234 [00:02:03.834,000] modem_hl7812: sock_read: Got all data, get EOF and OK (buf len:42) [00:02:03.834,000] modem_hl7812: sock_read: Sock 1 RX done [00:02:03.834,000] modem_hl7812: allow_sleep: Keep sleep +KUDP_RCV: "10.105.16.254",53 [00:02:03.834,000] modem_hl7812: hl7812_rx: UNHANDLED RX IN2 2b 4b 55 44 50 5f 52 43 56 3a 20 22 31 30 2e 31 |+KUDP_RC V: "10.1 30 35 2e 31 36 2e 32 35 34 22 2c 35 33 |05.16.25 4",53 [00:02:03.834,000] modem_hl7812: sockreadrecv_cb_work: Sock 1 RX CB (size: 220) [00:02:03.931,000] aws_iot_netfeasa: broker_init: IPv4 Address found 52.213.132.116 [00:02:03.938,000] modem_hl7812: offload_get: offload_get [00:02:03.938,000] modem_hl7812: allow_sleep: Keep sleep [00:02:03.938,000] modem_hl7812: offload_recv: offload_recv [00:02:03.938,000] modem_hl7812: offload_bind: offload_bind [00:02:03.938,000] modem_hl7812: offload_connect: offload_connect [00:02:03.938,000] modem_hl7812: allow_sleep: Keep awake [00:02:03.938,000] modem_hl7812: allow_sleep_with_timeout: Keep awake [00:02:03.938,000] modem_hl7812: is_cmd_ready: 265 LOWPOWER VGPIO:1 GPIO6:1 UART_CTS:0 [00:02:03.938,000] modem_hl7812: send_at_cmd: OUT: [AT+KTCPCFG=1,0,"52.213.132.116",8883,,,,0,,0] [00:02:03.942,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET11: 0 +KTCPCFG: 2 [00:02:03.962,000] modem_hl7812: hl7812_rx: HANDLE +KTCPCFG: (len:1) [00:02:03.962,000] modem_hl7812: on_cmd_sockcreate: +KTCPCFG: 2 [00:02:03.962,000] modem_hl7812: on_cmd_sockcreate: look up new socket by creation id OK [00:02:03.963,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) [00:02:04.343,000] modem_hl7812: send_at_cmd: OUT: [AT+KTCPCNX=2] [00:02:04.344,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET11: 0 OK [00:02:04.369,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) +KTCP_IND: 2,1 [00:02:04.890,000] modem_hl7812: hl7812_rx: HANDLE +KTCP_IND: (len:3) [00:02:04.890,000] modem_hl7812: on_cmd_sock_ind: +KTCP_IND ID: 2 [00:02:04.890,000] modem_hl7812: allow_sleep: Keep sleep [00:02:04.907,000] modem_hl7812: allow_sleep: Keep awake [00:02:04.907,000] modem_hl7812: allow_sleep_with_timeout: Keep awake [00:02:04.907,000] modem_hl7812: is_cmd_ready: 265 LOWPOWER VGPIO:1 GPIO6:1 UART_CTS:0 [00:02:04.907,000] modem_hl7812: send_at_cmd: reset iface_ctx.response_sem: 0 [00:02:04.907,000] modem_hl7812: send_at_cmd: OUT: [AT+CCLK?] [00:02:04.907,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET01: 0 +CCLK: "24/07/07,17:38:14+08" [00:02:04.912,000] modem_hl7812: hl7812_rx: HANDLE +CCLK: (len:22) [00:02:04.912,000] modem_hl7812: wait_for_modem_data: cur:23, exp:25 [00:02:04.962,000] modem_hl7812: RTC string: '"24/07/07,17:38:14+08"' OK ``` failure connection: ```auto [00:01:56.636,000] modem_hl7812: send_at_cmd: OUT: [AT+KCNXCFG=1,"GPRS","",,,"IPV4V6"] [00:01:56.639,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET01: 0 OK [00:01:56.656,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) [00:01:56.656,000] modem_hl7812: send_at_cmd: reset iface_ctx.response_sem: 0 [00:01:56.656,000] modem_hl7812: send_at_cmd: OUT: [AT+KTCPCFG?] [00:01:56.657,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET01: 0 OK [00:01:56.662,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) [00:01:56.662,000] modem_hl7812: send_at_cmd: reset iface_ctx.response_sem: 0 [00:01:56.662,000] modem_hl7812: send_at_cmd: OUT: [AT+KUDPCFG?] [00:01:56.663,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET01: 0 +KUDPCFG: 1,1,0,4184,0,"",0,0,1,0,3 [00:01:56.672,000] modem_hl7812: hl7812_rx: HANDLE +KUDPCFG: (len:25) [00:01:56.672,000] modem_hl7812: on_cmd_sockcreate: +KUDPCFG: 1 [00:01:56.672,000] modem_hl7812: on_cmd_sockcreate: look up new socket by creation id OK [00:01:56.672,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) [00:01:56.672,000] modem_hl7812: send_at_cmd: reset iface_ctx.response_sem: 0 [00:01:56.672,000] modem_hl7812: send_at_cmd: OUT: [AT+CGCONTRDP=1] [00:01:56.674,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET01: 0 +CGCONTRDP: 1,5,"net",10.149.39.64.255.255.255.128,10.149.39.1,10.105.16.254,10.105.144.254,,,,,,, [00:01:56.687,000] modem_hl7812: hl7812_rx: HANDLE +CGCONTRDP: (len:118) [00:01:56.687,000] modem_hl7812: on_cmd_atcmdinfo_ipaddr: IP info: 118 1,5,"net",10.149.39.64.255.255.255.128,10.149.39.1,10.105.16.254,10.105.144.254,,,,,,,,, [00:01:56.687,000] modem_hl7812: on_cmd_atcmdinfo_ipaddr: IP string len: 29 [00:01:56.687,000] modem_hl7812: on_cmd_atcmdinfo_ipaddr: IP addr: 10.149.39.64 [00:01:56.687,000] modem_hl7812: on_cmd_atcmdinfo_ipaddr: IPv4 DNS addr: 10.105.16.254 OK [00:01:56.687,000] modem_hl7812: hl7812_rx: HANDLE OK (len:0) [00:01:58.687,000] modem_hl7812: allow_sleep: Keep sleep [00:01:58.687,000] modem_hl7812: offload_bind: offload_bind [00:01:58.687,000] modem_hl7812: dns_work_cb: DNS ready [00:01:58.687,000] modem_module: pdn_event_handler: PDN_EVENT_ACTIVATED [00:01:58.687,000] LTE_HL7812: iface_ready_evt_handler: LTE is ready! [00:01:58.688,000] modem_module: pdn_event_handler: PDN_EVENT_ACTIVATED [00:01:58.688,000] LTE_HL7812: iface_ready_evt_handler: LTE is ready! [00:01:58.688,000] modem_module: state_set: State transition STATE_DISCONNECTED --> STATE_CONNECTED [00:01:58.688,000] cloud_module: state_set: State transition STATE_LTE_DISCONNECTED --> STATE_LTE_CONNECTED [00:01:58.688,000] cloud_module: connect_cloud: Connecting to cloud [00:01:58.688,000] cloud_module: CLOUD CONNECT RETRIES: 0 [00:01:58.688,000] cloud_module: connect_cloud: Cloud connection establishment in progress [00:01:58.688,000] cloud_module: connect_cloud: New connection attempt in 32 seconds if not successful [00:01:58.791,000] aws_iot_integration: aws_iot_event_handler: AWS_IOT_EVT_CONNECTING [00:01:58.791,000] cloud_module: cloud_wrap_event_handler: CLOUD_WRAP_EVT_CONNECTING [00:01:58.791,000] modem_hl7812: offload_recv: offload_recv [00:01:58.791,000] modem_hl7812: offload_sendto: offload_sendto [00:01:58.791,000] modem_hl7812: allow_sleep: Keep awake [00:01:58.791,000] modem_hl7812: allow_sleep_with_timeout: Keep awake [00:01:58.791,000] modem_hl7812: is_cmd_ready: 265 LOWPOWER VGPIO:1 GPIO6:1 UART_CTS:0 [00:01:58.791,000] modem_hl7812: send_at_cmd: OUT: [AT+KUDPSND=1,"10.105.16.254",53,64] CONNECT [00:01:58.806,000] modem_hl7812: hl7812_rx: HANDLE CONNECT (len:0) [00:01:58.882,000] modem_hl7812: send_data: Sent 64 bytes NO CARRIER [00:01:58.891,000] modem_hl7812: hl7812_rx: HANDLE NO CARRIER (len:0) [00:01:58.892,000] modem_hl7812: allow_sleep: Keep sleep [00:01:58.892,000] aws_iot_netfeasa: getaddrinfo, error -11 [00:01:58.892,000] aws_iot_netfeasa: client_broker_init, error: -10 [00:01:58.892,000] aws_iot_integration: aws_iot_event_handler: AWS_IOT_EVT_CONNECTING [00:01:58.892,000] cloud_module: cloud_wrap_event_handler: CLOUD_WRAP_EVT_CONNECTING +KUDP_NOTIF: 1,8 [00:01:58.893,000] modem_hl7812: hl7812_rx: HANDLE +KUDP_NOTIF: (len:3) [00:01:58.893,000] modem_hl7812: +K**P_NOTIF: 1,8 [00:02:00.688,000] modem_hl7812: allow_sleep: Keep awake [00:02:00.688,000] modem_hl7812: allow_sleep_with_timeout: Keep awake [00:02:00.688,000] modem_hl7812: is_cmd_ready: 265 LOWPOWER VGPIO:1 GPIO6:1 UART_CTS:0 [00:02:00.688,000] modem_hl7812: send_at_cmd: reset iface_ctx.response_sem: 0 [00:02:00.688,000] modem_hl7812: send_at_cmd: OUT: [AT+CCLK?] [00:02:00.688,000] modem_hl7812: send_at_cmd: SEND ATCMD k_sem_take RET01: 0 +CCLK: "24/07/07,17:33:56+08" [00:02:00.693,000] modem_hl7812: hl7812_rx: HANDLE +CCLK: (len:22) [00:02:00.693,000] modem_hl7812: wait_for_modem_data: cur:23, exp:25 [00:02:00.743,000] modem_hl7812: RTC string: '"24/07/07,17:33:56+08"' OK ``` ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [July 7, 2024, 3:53pm UTC](https://forum.sierrawireless.com/t/hl7812-kudpsnd-no-carrier-issue/32711/8 "2024-07-07T15:53:46Z")
in the OK log, AT+KUDPCFG? returns OK but for the NOK log, AT+KUDPCFG? return differently with “+KUDPCFG: 1,1,0,4184,0,”“,0,0,1,0,3” ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [July 7, 2024, 4:05pm UTC](https://forum.sierrawireless.com/t/hl7812-kudpsnd-no-carrier-issue/32711/10 "2024-07-07T16:05:36Z")
can you paste the exact same sequence for comparison of OK log and NOK log? Also you can try just send one byte and see what happens ---
**Author:** ![zsen](https://avatars.discourse-cdn.com/v4/letter/z/b487fb/32.png) [@zsen](https://forum.sierrawireless.com/u/zsen)\ **Post date:** [July 7, 2024, 4:34pm UTC](https://forum.sierrawireless.com/t/hl7812-kudpsnd-no-carrier-issue/32711/11 "2024-07-07T16:34:52Z")
> [@jyijyi](#): > > in the OK log, AT+KUDPCFG? returns OK > but for the NOK log, AT+KUDPCFG? return differently with “+KUDPCFG: 1,1,0,4184,0,”“,0,0,1,0,3” Sir you were right there. it was exactly the issue that you pointed there, thanks, I went through all logs since it booted up, and didn’t see anywhere udpcfg was called and configured. I dont know that how that configuration was written there and stick, though the modem is rebooted. But after removing UDPCFG and reconfiguring, the issue has been fixed.