In our application we using nrd5340-nrf7002, application flow is wakeup->wifi connect->NTP time get->TCP server connect->wifi shutdown->idle->wakeup.....
We are encountering a "Received watchdog interrupt" issue during run time on four devices after Wi-Fi connects, when SNTP server or DNS resolution fails. When DNS resolution fails, the watchdog triggers, causing the device to freeze and require a hard reset.
We are encountering a "Received watchdog interrupt" issue during run time on four devices after Wi-Fi connects, when SNTP server or DNS resolution fails. When DNS resolution fails, the watchdog triggers, causing the device to freeze and require a hard reset.
Given that our SDK version 2.6.2 does not have any explicitly enabled or configured watchdogs, we suspect a hardware watchdog issue. Since the system isn't automatically recovering, what mitigation strategies and recovery mechanisms do you recommend?
Although infrequent, we want to implement a robust solution for prevention and recovery. Could you provide guidance on potential causes, debugging steps, and recommended mitigations for this issue?
Here I attach the log for your reference.
2025-03-29 01:52:50.302000 [08:54:29.391,815] [0m<inf> fs_nvs: 2 Sectors of 4096 bytes[0m 2025-03-29 01:52:50.303000 [08:54:29.391,815] [0m<inf> fs_nvs: alloc wra: 0, f90[0m 2025-03-29 01:52:50.304000 [08:54:29.391,815] [0m<inf> fs_nvs: data wra: 0, 7e0[0m 2025-03-29 01:52:50.305000 [08:54:29.393,981] [0m<inf> fs_nvs: 2 Sectors of 4096 bytes[0m 2025-03-29 01:52:50.306000 [08:54:29.393,981] [0m<inf> fs_nvs: alloc wra: 0, f90[0m 2025-03-29 01:52:50.308000 [08:54:29.393,981] [0m<inf> fs_nvs: data wra: 0, 7e0[0m 2025-03-29 01:52:50.309000 [08:54:29.394,012] [0m<inf> settings_storage: Configuration loaded from flash. 2025-03-29 01:52:50.310000 [0m 2025-03-29 01:52:50.311000 [08:54:29.394,042] [0m<inf> settings_storage: Loaded SSID: ADMIN 2025-03-29 01:52:50.311000 [0m 2025-03-29 01:52:50.313000 [08:54:29.394,042] [0m<inf> settings_storage: Loaded report interval: 1800 2025-03-29 01:52:50.313000 [0m 2025-03-29 01:52:50.316000 [08:54:29.396,209] [0m<inf> fs_nvs: 2 Sectors of 4096 bytes[0m 2025-03-29 01:52:50.317000 [08:54:29.396,240] [0m<inf> fs_nvs: alloc wra: 0, f90[0m 2025-03-29 01:52:50.318000 [08:54:29.396,240] [0m<inf> fs_nvs: data wra: 0, 7e0[0m 2025-03-29 01:52:50.320000 [08:54:29.400,207] [0m<inf> settings_storage: Configuration saved to flash successfully.[0m 2025-03-29 01:52:50.322000 [08:54:29.400,207] [0m<inf> PM: GetSleepTickCountToMemory 32061 2025-03-29 01:52:50.323000 [0m 2025-03-29 01:52:50.324000 [08:54:29.400,238] [0m<inf> PM: !!! Alarm !!! 2025-03-29 01:52:50.324000 [0m 2025-03-29 01:52:50.325000 [08:54:29.400,238] [0m<inf> PM: Now: 32062 2025-03-29 01:52:50.326000 [0m 2025-03-29 01:52:50.327000 [0m 2025-03-29 01:52:50.589000 [08:54:29.764,648] [0m<inf> controller_mgnt: exit low power mode 2025-03-29 01:52:51.251000 [08:54:30.414,886] [0m<inf> BatteryManager: 2025-03-29 01:52:51.252000 Battery g_unBatteryPercentage 88 2025-03-29 01:52:51.252000 [0m 2025-03-29 01:52:51.253000 [08:54:30.414,886] [0m<inf> BatteryManager: CE Enable 2025-03-29 01:52:51.253000 [0m 2025-03-29 01:52:51.291000 [08:54:30.471,527] [0m<inf> wifi_nrf: Management buffer offload enabled 2025-03-29 01:52:51.521000 [08:54:30.602,203] [0m<inf> nrf7002_wifi: Interface up[0m 2025-03-29 01:52:51.522000 [08:54:30.610,717] [0m<inf> nrf7002_wifi: Scan requested 2025-03-29 01:52:51.523000 [0m 2025-03-29 01:52:51.524000 [08:54:30.614,562] [0m<inf> dataReacord_manager: Recent Head Index: 27[0m 2025-03-29 01:52:51.525000 [08:54:30.614,562] [0m<inf> dataReacord_manager: Recent Tail Index: 16[0m 2025-03-29 01:52:51.527000 [08:54:30.614,562] [0m<inf> dataReacord_manager: Latest Packet ID: 28[0m 2025-03-29 01:52:51.530000 [08:54:30.614,562] [0m<inf> dataReacord_manager: Record Count: 11[0m 2025-03-29 01:52:51.532000 [08:54:30.614,593] [0m<inf> dataReacord_manager: Head Index Value: 27[0m 2025-03-29 01:52:51.533000 [08:54:30.614,593] [0m<inf> dataReacord_manager: Tail Index Value: 16[0m 2025-03-29 01:52:51.535000 [08:54:30.614,624] [1;31m<err> dataReacord_manager: In ReadFromIndex unIndex 26 unRelativeAddr 3458 unRecordAddr 0xdcd82 [0m 2025-03-29 01:52:56.926000 [08:54:35.227,203] [0m<inf> nrf7002_wifi: Scan request done 2025-03-29 01:52:56.926000 [0m 2025-03-29 01:52:56.928000 [08:54:36.105,682] [0m<inf> wifi_mgmt_ext: Connection requested[0m 2025-03-29 01:53:02.960000 [08:54:41.958,587] [0m<inf> nrf7002_wifi: NET_EVENT_WIFI_CONNECT_RESULT---- 2025-03-29 01:53:02.961000 [0m 2025-03-29 01:53:02.962000 [1;31m--- 5 messages dropped --- 2025-03-29 01:53:02.964000 [0m[08:54:41.965,515] [0m<inf> nrf7002_wifi: BSSID: 0X[0m 2025-03-29 01:53:02.965000 [08:54:41.965,515] [0m<inf> nrf7002_wifi: Band: 2.4GHz[0m 2025-03-29 01:53:02.966000 [08:54:41.965,545] [0m<inf> nrf7002_wifi: Channel: 1[0m 2025-03-29 01:53:02.967000 [08:54:41.965,545] [0m<inf> nrf7002_wifi: Security: WPA2-PSK[0m 2025-03-29 01:53:02.968000 [08:54:41.965,576] [0m<inf> nrf7002_wifi: MFP: Optional[0m 2025-03-29 01:53:02.969000 [08:54:41.965,576] [0m<inf> nrf7002_wifi: RSSI: -42[0m 2025-03-29 01:53:02.971000 [08:54:41.965,606] [0m<inf> nrf7002_wifi: ---------_cmd_wifi_status------- 2025-03-29 01:53:02.971000 [0m 2025-03-29 01:53:02.972000 [08:54:41.969,451] [0m<inf> nrf7002_wifi: ==================[0m 2025-03-29 01:53:02.973000 [08:54:41.969,482] [0m<inf> nrf7002_wifi: State: COMPLETED[0m 2025-03-29 01:53:02.975000 [08:54:41.969,512] [0m<inf> nrf7002_wifi: Interface Mode: STATION[0m 2025-03-29 01:53:02.976000 [08:54:41.969,512] [0m<inf> nrf7002_wifi: Link Mode: WIFI 4 (802.11n/HT)[0m 2025-03-29 01:53:02.977000 [08:54:41.969,543] [0m<inf> nrf7002_wifi: SSID: ADMIN[0m 2025-03-29 01:53:02.980000 [08:54:41.969,573] [0m<inf> nrf7002_wifi: BSSID: 0X[0m 2025-03-29 01:53:02.983000 [08:54:41.969,573] [0m<inf> nrf7002_wifi: Band: 2.4GHz[0m 2025-03-29 01:53:02.984000 [08:54:41.969,604] [0m<inf> nrf7002_wifi: Channel: 1[0m 2025-03-29 01:53:02.985000 [08:54:41.969,604] [0m<inf> nrf7002_wifi: Security: WPA2-PSK[0m 2025-03-29 01:53:02.986000 [08:54:41.969,635] [0m<inf> nrf7002_wifi: MFP: Optional[0m 2025-03-29 01:53:02.988000 [08:54:41.969,635] [0m<inf> nrf7002_wifi: RSSI: -42[0m 2025-03-29 01:53:02.990000 [08:54:41.969,635] [0m<inf> nrf7002_wifi: ---------_cmd_wifi_status------- 2025-03-29 01:53:02.990000 [0m 2025-03-29 01:53:02.992000 [08:54:41.973,419] [0m<inf> nrf7002_wifi: ==================[0m 2025-03-29 01:53:02.993000 [08:54:41.973,449] [0m<inf> nrf7002_wifi: State: COMPLETED[0m 2025-03-29 01:53:02.994000 [08:54:41.973,480] [0m<inf> nrf7002_wifi: Interface Mode: STATION[0m 2025-03-29 01:53:02.997000 [08:54:41.973,510] [0m<inf> nrf7002_wifi: Link Mode: WIFI 4 (802.11n/HT)[0m 2025-03-29 01:53:03.001000 [08:54:41.973,541] [0m<inf> nrf7002_wifi: SSID: ADMIN[0m 2025-03-29 01:53:03.002000 [08:54:41.973,541] [0m<inf> nrf7002_wifi: BSSID: 0X[0m 2025-03-29 01:53:03.004000 [08:54:41.973,571] [0m<inf> nrf7002_wifi: Band: 2.4GHz[0m 2025-03-29 01:53:03.005000 [08:54:41.973,571] [0m<inf> nrf7002_wifi: Channel: 1[0m 2025-03-29 01:53:03.006000 [08:54:41.973,602] [0m<inf> nrf7002_wifi: Security: WPA2-PSK[0m 2025-03-29 01:53:03.007000 [08:54:41.973,632] [0m<inf> nrf7002_wifi: MFP: Optional[0m 2025-03-29 01:53:03.009000 [08:54:41.973,632] [0m<inf> nrf7002_wifi: RSSI: -42[0m 2025-03-29 01:53:03.010000 [08:54:41.973,663] [0m<inf> nrf7002_wifi: ---------_cmd_wifi_status------- 2025-03-29 01:53:03.010000 [0m 2025-03-29 01:53:05.981000 [08:54:45.128,479] [0m<inf> net_dhcpv4: Received: 192.168.137.253[0m 2025-03-29 01:53:05.981000 [08:54:45.128,601] [0m<inf> net_config: IPv4 address: 192.168.137.253[0m 2025-03-29 01:53:05.984000 [08:54:45.128,631] [0m<inf> net_config: Lease time: 604800 seconds[0m 2025-03-29 01:53:05.984000 [08:54:45.128,662] [0m<inf> net_config: Subnet: 255.255.255.0[0m 2025-03-29 01:53:05.985000 [08:54:45.128,692] [0m<inf> net_config: Router: 192.168.137.1[0m 2025-03-29 01:53:05.987000 [08:54:45.128,845] [0m<inf> nrf7002_wifi: ********************DHCP IP address***********************: 192.168.137.253 2025-03-29 01:53:05.988000 [0m 2025-03-29 01:53:06.030000 [08:54:45.191,680] [0m<inf> nrf7002_wifi: Wi-Fi is connected, DNS resolution successful www.google.com. 2025-03-29 01:53:06.030000 [0m 2025-03-29 01:53:06.032000 [08:54:45.191,711] [0m<inf> nrf7002_wifi: NET_EVENT_WIFI_CONNECT_RESULT 2025-03-29 01:53:06.032000 [0m 2025-03-29 01:53:06.033000 [08:54:45.191,741] [0m<inf> nrf7002_wifi: Connected 2025-03-29 01:53:06.034000 [0m 2025-03-29 01:53:06.138000 [08:54:45.242,980] [0m<inf> wifi_manager: WiFi Connected: [0m 2025-03-29 01:53:06.142000 [08:54:45.243,041] [0m<inf> controller_mgnt: CONTROLLER_MESSAGE_WIFI_CONFIGURATION_SUCCESS [0m 2025-03-29 01:53:06.150000 [08:54:45.276,275] [0m<inf> data_collector: DATA_COLLECTOR_MESSAGE_START_DATA_COLLECTION[0m 2025-03-29 01:53:06.151000 [08:54:45.276,306] [0m<inf> data_collector: Data measure[0m 2025-03-29 01:53:06.154000 [08:54:45.276,306] [0m<inf> nrf7002_wifi: SNTP Time Sync Start 2025-03-29 01:53:06.155000 [0m 2025-03-29 01:53:06.157000 [08:54:45.276,336] [0m<inf> nrf7002_wifi: Trying SNTP server: time.nist.gov 2025-03-29 01:53:06.157000 [0m 2025-03-29 01:53:26.107000 [08:55:05.276,641] [1;31m<err> nrf7002_wifi: SNTP request failed for server time.nist.gov: -101 2025-03-29 01:53:26.108000 [0m 2025-03-29 01:53:26.110000 [08:55:05.276,672] [0m<inf> nrf7002_wifi: Trying SNTP server: time.google.com 2025-03-29 01:53:26.111000 [0m 2025-03-29 01:53:46.110000 [08:55:25.276,977] [1;31m<err> nrf7002_wifi: SNTP request failed for server time.google.com: -101 2025-03-29 01:53:46.110000 [0m 2025-03-29 01:53:46.111000 [08:55:25.277,008] [0m<inf> nrf7002_wifi: Trying SNTP server: pool.ntp.org 2025-03-29 01:53:46.112000 [0m 2025-03-29 01:54:06.221000 [08:55:45.277,282] [1;31m<err> nrf7002_wifi: SNTP request failed for server pool.ntp.org: -101 2025-03-29 01:54:06.222000 [0m 2025-03-29 01:54:06.223000 [08:55:45.277,282] [1;31m<err> nrf7002_wifi: All SNTP servers failed. 2025-03-29 01:54:06.224000 [0m 2025-03-29 01:54:06.225000 [08:55:45.277,313] [0m<inf> nrf7002_wifi: ConvertUnixSecondsToDateTime1743193424 2025-03-29 01:54:06.225000 [0m 2025-03-29 01:54:06.227000 [08:55:45.277,343] [0m<inf> nrf7002_wifi: set Date 28 month 3 year 2025 Hour 20 m_unMinutes 23 second 44 2025-03-29 01:54:06.227000 [0m 2025-03-29 01:54:06.228000 [08:55:45.279,266] [0m<inf> fs_nvs: 2 Sectors of 4096 bytes[0m 2025-03-29 01:54:06.229000 [08:55:45.279,266] [0m<inf> fs_nvs: alloc wra: 0, f80[0m 2025-03-29 01:54:06.230000 [08:55:45.279,296] [0m<inf> fs_nvs: data wra: 0, 930[0m 2025-03-29 01:54:06.232000 [08:55:45.283,264] [0m<inf> settings_storage: Configuration saved to flash successfully.[0m 2025-03-29 01:54:06.233000 [08:55:45.283,264] [0m<inf> nrf7002_wifi: day 28 : 3 : 25 : 20 : 23 : 44 2025-03-29 01:54:06.234000 [0m 2025-03-29 01:54:06.254000 [08:55:45.283,966] [0m<inf> nrf7002_wifi: p_unIpAddress 35.160.190.26, p_unDnsName lsnr-tcbe-dev.nimblepetapp.com unPortNumber 8765[0m 2025-03-29 01:54:26.105000 [08:56:05.284,240] [1;31m<err> nrf7002_wifi: DNS lookup failed with error -101 2025-03-29 01:54:26.105000 [0m 2025-03-29 01:54:41.516000 [08:56:20.695,831] [1;31m<err> wifi_nrf: Received watchdog interrupt[0m 2025-03-29 01:54:43.608000 [08:56:22.786,865] [0m<inf> wifi_nrf: Management buffer offload enabled 2025-03-29 01:54:43.6080
