Hello,
I have configured MQTT over TLS to connect to our broker. Everything works great except that the modem stops reconnecting to the broker after exactly 22 connect-disconnect cycles for some unknown reason. The modem establishes the connection to the broker but the firmware gets stuck at nrf_write(see call stack).
I am using v2.1.99 with nRF9160-DK board. The modem has the latest version v1.2.
Could you help me to figure out why it stops reconnecting to the broker? I have prepared a sample project to reproduce the problem.
*** Booting Zephyr OS build v2.1.99-ncs1 *** Flash region Domain Permissions 00 0x00000 0x08000 Secure rwxl 01 0x08000 0x10000 Non-Secure rwxl 02 0x10000 0x18000 Non-Secure rwxl 03 0x18000 0x20000 Non-Secure rwxl 04 0x20000 0x28000 Non-Secure rwxl 05 0x28000 0x30000 Non-Secure rwxl 06 0x30000 0x38000 Non-Secure rwxl 07 0x38000 0x40000 Non-Secure rwxl 08 0x40000 0x48000 Non-Secure rwxl 09 0x48000 0x50000 Non-Secure rwxl 10 0x50000 0x58000 Non-Secure rwxl 11 0x58000 0x60000 Non-Secure rwxl 12 0x60000 0x68000 Non-Secure rwxl 13 0x68000 0x70000 Non-Secure rwxl 14 0x70000 0x78000 Non-Secure rwxl 15 0x78000 0x80000 Non-Secure rwxl 16 0x80000 0x88000 Non-Secure rwxl 17 0x88000 0x90000 Non-Secure rwxl 18 0x90000 0x98000 Non-Secure rwxl 19 0x98000 0xa0000 Non-Secure rwxl 20 0xa0000 0xa8000 Non-Secure rwxl 21 0xa8000 0xb0000 Non-Secure rwxl 22 0xb0000 0xb8000 Non-Secure rwxl 23 0xb8000 0xc0000 Non-Secure rwxl 24 0xc0000 0xc8000 Non-Secure rwxl 25 0xc8000 0xd0000 Non-Secure rwxl 26 0xd0000 0xd8000 Non-Secure rwxl 27 0xd8000 0xe0000 Non-Secure rwxl 28 0xe0000 0xe8000 Non-Secure rwxl 29 0xe8000 0xf0000 Non-Secure rwxl 30 0xf0000 0xf8000 Non-Secure rwxl 31 0xf8000 0x100000 Non-Secure rwxl Non-secure callable region 0 placed in flash region 0 with size 32. SRAM region Domain Permissions 00 0x00000 0x02000 Secure rwxl 01 0x02000 0x04000 Secure rwxl 02 0x04000 0x06000 Secure rwxl 03 0x06000 0x08000 Secure rwxl 04 0x08000 0x0a000 Secure rwxl 05 0x0a000 0x0c000 Secure rwxl 06 0x0c000 0x0e000 Secure rwxl 07 0x0e000 0x10000 Secure rwxl 08 0x10000 0x12000 Non-Secure rwxl 09 0x12000 0x14000 Non-Secure rwxl 10 0x14000 0x16000 Non-Secure rwxl 11 0x16000 0x18000 Non-Secure rwxl 12 0x18000 0x1a000 Non-Secure rwxl 13 0x1a000 0x1c000 Non-Secure rwxl 14 0x1c000 0x1e000 Non-Secure rwxl 15 0x1e000 0x20000 Non-Secure rwxl 16 0x20000 0x22000 Non-Secure rwxl 17 0x22000 0x24000 Non-Secure rwxl 18 0x24000 0x26000 Non-Secure rwxl 19 0x26000 0x28000 Non-Secure rwxl 20 0x28000 0x2a000 Non-Secure rwxl 21 0x2a000 0x2c000 Non-Secure rwxl 22 0x2c000 0x2e000 Non-Secure rwxl 23 0x2e000 0x30000 Non-Secure rwxl 24 0x30000 0x32000 Non-Secure rwxl 25 0x32000 0x34000 Non-Secure rwxl 26 0x34000 0x36000 Non-Secure rwxl 27 0x36000 0x38000 Non-Secure rwxl 28 0x38000 0x3a000 Non-Secure rwxl 29 0x3a000 0x3c000 Non-Secure rwxl 30 0x3c000 0x3e000 Non-Secure rwxl 31 0x3e000 0x40000 Non-Secure rwxl Peripheral Domain Status 00 NRF_P0 Non-Secure OK 01 NRF_CLOCK Non-Secure OK 02 NRF_RTC0 Non-Secure OK 03 NRF_RTC1 Non-Secure OK 04 NRF_NVMC Non-Secure OK 05 NRF_UARTE1 Non-Secure OK 06 NRF_UARTE2 Secure SKIP 07 NRF_TWIM2 Non-Secure OK 08 NRF_SPIM3 Non-Secure OK 09 NRF_TIMER0 Non-Secure OK 10 NRF_TIMER1 Non-Secure OK 11 NRF_TIMER2 Non-Secure OK 12 NRF_SAADC Non-Secure OK 13 NRF_PWM0 Non-Secure OK 14 NRF_PWM1 Non-Secure OK 15 NRF_PWM2 Non-Secure OK 16 NRF_PWM3 Non-Secure OK 17 NRF_WDT Non-Secure OK 18 NRF_IPC Non-Secure OK 19 NRF_VMC Non-Secure OK 20 NRF_FPU Non-Secure OK 21 NRF_EGU1 Non-Secure OK 22 NRF_EGU2 Non-Secure OK 23 NRF_DPPIC Non-Secure OK 24 NRF_GPIOTE1 Non-Secure OK 25 NRF_REGULATORS Non-Secure OK SPM: NS image at 0xc000 SPM: NS MSP at 0x20024d88 SPM: NS reset vector at 0xd101 SPM: prepare to jump to Non-Secure image. *** Booting Zephyr OS build v2.1.99-ncs1 *** The MQTT simple sample started LTE Link Connecting ... +CEREG: 2,"3EE7","016ECB01",7,0,0,"11100000","11100000" +CEREG: 5,"3EE7","016ECB01",7,,,"11100000","11100000" LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217 [mqtt_evt_handler:225] MQTT client connected! Disconnecting MQTT client... [mqtt_evt_handler:231] MQTT client disconnected 0 LTE Link Connecting ... LTE Link Connected! IPv4 Address found 137.135.83.217
