Why did the 9160 fail to resolve the domain name?(SDK1.9.0 modem fw 1.3.1)

[duxinglang]

developed a product using the 9160. Now I need to upgrade the SDK from 1.2.0 to 1.9.0. During the test, I found that the servers that could be connected normally in the past could not be connected in the 1.9.0 version of the SDK. But what's more strange is that some devices can be connected normally, while the devices that failed to connect report the following errors:

00> [03154935] <wrn> download_ client: Failed to resolve hostname aug-fm-files-cn.oss-cn-shenzhen.aliyuncs. com on IPv4

00> [03154957] <inf> E2: [15:21:10:281]..dl_ transfer_ start>>download_ start() failed, err -118.

I also made another test. The firmware of the sdk 1.2.0 can be connected to the device with the problem, regardless of whether the modem fw version is 1.2.0 or 1.3.1. However, the connection to the sdk 1.9.0 version failed. Why?

[Hakon]

Hello,

can you include modem traces from the working cases (ncs 1.2.0) and the failing cases (ncs 1.9.0)?

[duxinglang]

Hi hakon, 

I'm sorry that I only replied to your message now, because other things delayed. Now I'm ready to grab the modem trace, but there is a problem here. When I added "CONFIG_NRF_MODEM_LIB_TRACE_ENABLED=y" into the prl.conf file, my device crashed when I started it! And after i remove this sentence and it can run normally. I can confirm that there is no problem with the hardware wiring of my device. Before adding this sentence, the trace collector can receive the data sent by uart.

This is my conf file and overlay file. Maybe you can help me check whether there are problems with these configurations. Thank you!

#
# Copyright (c) 2019 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic
#
# General config
CONFIG_NEWLIB_LIBC=y
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
CONFIG_ASSERT=y
CONFIG_REBOOT=y
CONFIG_GPIO=y
CONFIG_TRUSTED_EXECUTION_NONSECURE=y

# Log
CONFIG_LOG=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=n
CONFIG_LOG_DEFAULT_LEVEL=4
CONFIG_LOG_MODE_OVERFLOW=y
CONFIG_LOG_BACKEND_RTT_MODE_DROP=y
CONFIG_LOG_BACKEND_SHOW_COLOR=n
CONFIG_LOG_BACKEND_FORMAT_TIMESTAMP=n

# watch dog
CONFIG_WATCHDOG=y
CONFIG_WATCHDOG_TIMEOUT_MSEC=10000

# Modem info
CONFIG_MODEM_INFO=y

# Modem library
CONFIG_NRF_MODEM_LIB=y
CONFIG_NRF_MODEM_LIB_SYS_INIT=n
CONFIG_NRF_MODEM_LIB_TRACE_ENABLED=y

# BSD library
#CONFIG_BSD_LIBRARY=y
#CONFIG_BSD_LIBRARY_TRACE_ENABLED=n

# NVS
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_NVS=y
CONFIG_NVS_LOG_LEVEL_DBG=y
CONFIG_MPU_ALLOW_FLASH_WRITE=y

# GPS
# Enable to use an external GNSS antenna
CONFIG_GNSS_SAMPLE_ANTENNA_EXTERNAL=y
# Enable to use nRF Cloud A-GPS
CONFIG_GNSS_SAMPLE_ASSISTANCE_NRF_CLOUD=n
# Secure User-Plane Location (SUPL) client library (https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/libraries/others/supl_os_client.html)
CONFIG_GNSS_SAMPLE_ASSISTANCE_SUPL=y

# AT_CMD
#CONFIG_AT_HOST_LIBRARY=y
#CONFIG_UART_INTERRUPT_DRIVEN=y

# Console
CONFIG_CONSOLE_SUBSYS=n
CONFIG_CONSOLE_HANDLER=n
CONFIG_CONSOLE_GETCHAR=n
CONFIG_CONSOLE=y
CONFIG_RTT_CONSOLE=y
CONFIG_UART_CONSOLE=n

# Network
CONFIG_NETWORKING=y
CONFIG_NET_NATIVE=n
CONFIG_NET_SOCKETS_OFFLOAD=y
CONFIG_NET_SOCKETS=y
CONFIG_NET_SOCKETS_POSIX_NAMES=y

# LTE link control
CONFIG_LTE_LINK_CONTROL=y
CONFIG_LTE_AUTO_INIT_AND_CONNECT=n
CONFIG_LTE_NETWORK_USE_FALLBACK=y
CONFIG_LTE_NETWORK_TIMEOUT=180
CONFIG_LTE_NETWORK_MODE_LTE_M_GPS=n
CONFIG_LTE_NETWORK_MODE_NBIOT_GPS=y

# PSM
CONFIG_MODEM_AUTO_REQUEST_POWER_SAVING_FEATURES=y
# Set Periodic-TAU timer to 1 hour and Active-Time to 10 seconds.
CONFIG_LTE_PSM_REQ_RPTAU="01000110"
CONFIG_LTE_PSM_REQ_RAT="00000101"

# MQTT
CONFIG_MQTT_LIB=y
CONFIG_MQTT_LIB_TLS=n
CONFIG_MQTT_KEEPALIVE=300
CONFIG_MQTT_PUB_TOPIC="device/e2/pushdata"
CONFIG_MQTT_SUB_TOPIC="device/e2/"
CONFIG_MQTT_CLIENT_ID="my-client-id"
CONFIG_MQTT_USER_NAME="admin123"
CONFIG_MQTT_PASSWORD="admin123"
CONFIG_MQTT_DOMESTIC_BROKER_HOSTNAME="47.107.51.89"
CONFIG_MQTT_DOMESTIC_BROKER_PORT=1883
CONFIG_MQTT_FOREIGN_BROKER_HOSTNAME="18.135.53.53"
CONFIG_MQTT_FOREIGN_BROKER_PORT=1883
CONFIG_MQTT_MESSAGE_BUFFER_SIZE=512
CONFIG_MQTT_PAYLOAD_BUFFER_SIZE=512

# Library for buttons and LEDs
CONFIG_DK_LIBRARY=y
CONFIG_DK_LIBRARY_INVERT_LEDS=n

# Heap and stacks
CONFIG_HEAP_MEM_POOL_SIZE=16384
CONFIG_MAIN_STACK_SIZE=8192
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
CONFIG_HW_STACK_PROTECTION=y

# SPI
CONFIG_SPI=y

# I2C
CONFIG_I2C=y

# UART
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y

# ANIMATION
CONFIG_ANIMATION_SUPPORT=y

# PPG
CONFIG_PPG_SUPPORT=y

# IMU
CONFIG_IMU_SUPPORT=y
CONFIG_STEP_SUPPORT=n
CONFIG_SLEEP_SUPPORT=n
CONFIG_FALL_DETECT_SUPPORT=n

# WIFI
CONFIG_WIFI_SUPPORT=y

# TP
CONFIG_TOUCH_SUPPORT=y

# AUDIO
CONFIG_AUDIO_SUPPORT=n

# Data Sync
CONFIG_SYNC_SUPPORT=y

# Temperature
CONFIG_TEMP_SUPPORT=y

# CRC Check
CONFIG_CRC_SUPPORT=y

# DEVICE POWER MANAGEMENT
CONFIG_PM_DEVICE=y

# Download client
CONFIG_DOWNLOAD_CLIENT=y
CONFIG_DOWNLOAD_CLIENT_MAX_HOSTNAME_SIZE=192
CONFIG_DOWNLOAD_CLIENT_MAX_FILENAME_SIZE=64
CONFIG_DOWNLOAD_CLIENT_STACK_SIZE=4096

# DATA UPDATE
CONFIG_DATA_DOWNLOAD_SUPPORT=y
CONFIG_DATA_DOWNLOAD_HOST_HK="aug-fm-files-hk.oss-cn-hongkong.aliyuncs.com"
CONFIG_DATA_DOWNLOAD_HOST_CN="aug-fm-files-cn.oss-cn-shenzhen.aliyuncs.com"
# IMG
CONFIG_IMG_DATA_UPDATE=y
CONFIG_IMG_DATA_DOWNLOAD_FILE="e2_img.bin"
# FONT
CONFIG_FONT_DATA_UPDATE=y
CONFIG_FONT_DATA_DOWNLOAD_FILE="e2_font.bin"
# PPG
CONFIG_PPG_DATA_UPDATE=y
CONFIG_PPG_DATA_DOWNLOAD_FILE="e2_ppg.bin"

# fota download
CONFIG_FOTA_DOWNLOAD=y
CONFIG_FOTA_DOWNLOAD_PROGRESS_EVT=y
CONFIG_FOTA_DOWNLOAD_HOST_HK="aug-fm-files-hk.oss-cn-hongkong.aliyuncs.com"
CONFIG_FOTA_DOWNLOAD_HOST_CN="aug-fm-files-cn.oss-cn-shenzhen.aliyuncs.com"
CONFIG_FOTA_DOWNLOAD_FILE="e2_update.bin"

# Image manager
CONFIG_IMG_MANAGER=y
CONFIG_FLASH=y
CONFIG_IMG_ERASE_PROGRESSIVELY=y

# DFU Target
CONFIG_DFU_TARGET=y

# Modem key management
CONFIG_MODEM_KEY_MGMT=y

# Application Upgrade support
CONFIG_BOOTLOADER_MCUBOOT=y

&spi2{
	compatible = "nordic,nrf-spim";
	status = "disabled";
	sck-pin = <3>;
	mosi-pin = <4>;
	miso-pin = <5>;
};

&spi3{
	compatible = "nordic,nrf-spim";
	status = "okay";
	sck-pin = <22>;
	mosi-pin = <20>;
	miso-pin = <5>;
};

&i2c1{
	compatible = "nordic,nrf-twim";
	status = "okay";
	sda-pin = <30>;
	scl-pin = <31>;
	clock-frequency = <I2C_BITRATE_FAST>;
};

&i2c2{
	compatible = "nordic,nrf-twim";
	status = "disabled";
};

&uart0 {
	status = "okay";
	current-speed = <115200>;
	tx-pin = <12>;
	rx-pin = <11>;
	/* delete rts-pin&cts-pin to release the related 2 pins for other uses */
	/delete-property/ rts-pin;
	/delete-property/ cts-pin;	
};

&uart1{
	status = "disabled";
};

&uart2{
	status = "okay";
	current-speed = <115200>;
	tx-pin = <18>;
	rx-pin = <19>;
	/* delete rts-pin&cts-pin to release the related 2 pins for other uses */
	/delete-property/ rts-pin;
	/delete-property/ cts-pin;
};

[duxinglang]

It seems that it crashed when sending the AT command here. By the way, the SDK version I use is ncs1.9.0, and the modem version is 1.3.2

[Hakon]

You are using a custom board, right? Did you follow this? https://infocenter.nordicsemi.com/topic/ug_trace_collector/UG/trace_collector/collect_modem_trace_custom.html

[duxinglang]

Hi Hankan

Thank you for your reply. The problem of capturing the modem trace has been solved. I have a more detailed data report in another case, but the problem of domain name resolution failure has not been solved.

devzone.nordicsemi.com/.../407290