https_client returning "getaddrinfo() failed, err 9"

RE: https_client returning "getaddrinfo() failed, err 9"

Saketaram — Tue, 28 Apr 2020 14:21:24 GMT

Thanks. The telecom provider didn't enable DNS.

RE: https_client returning "getaddrinfo() failed, err 9"

Håkon Alseth — Thu, 16 Apr 2020 06:49:31 GMT

Hi,

Thank you for the logs and testing this.

Unfortunately, this shows that your local carrier does not provide DNS.

When testing examples, you can manually resolve the hostname, for instance:

mqtt.eclipse.org resolves to "137.135.83.217" when I ping it at my end, then you can set this as the prj.conf::CONFIG_MQTT_BROKER_HOSTNAME="137.135.83.217"

Alternative can be to manually set the DNS, as a user has done in this post:

https://devzone.nordicsemi.com/f/nordic-q-a/50029/nrf9160-modem-firmware-v1-0-0-setting-custom-dns-server/235419#235419

Kind regards,

Håkon

RE: https_client returning "getaddrinfo() failed, err 9"

Saketaram — Wed, 15 Apr 2020 14:16:08 GMT

Trying mqtt_simple.

I added the last 3 lines to prj.conf

#
# Copyright (c) 2019 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-BSD-5-Clause-Nordic
#

# Networking
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

# BSD library
CONFIG_BSD_LIBRARY=y

# AT Host
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_AT_HOST_LIBRARY=y

# MQTT
CONFIG_MQTT_LIB=y
CONFIG_MQTT_LIB_TLS=n

# Appliaction
#CONFIG_MQTT_PUB_TOPIC="/my/publish/topic"
#CONFIG_MQTT_SUB_TOPIC="/my/subscribe/topic"
#CONFIG_MQTT_CLIENT_ID="my-client-id"
#CONFIG_MQTT_BROKER_HOSTNAME="mqtt.eclipse.org"
#CONFIG_MQTT_BROKER_PORT=1883

# Main thread
CONFIG_MAIN_STACK_SIZE=4096

CONFIG_HEAP_MEM_POOL_SIZE=2048

CONFIG_LTE_NETWORK_MODE_LTE_M=n
CONFIG_LTE_NETWORK_MODE_NBIOT=y

CONFIG_LTE_AUTO_INIT_AND_CONNECT=y

Then I compiled and flashed through command line.

And with PuTTY, I got this message:

*** Booting Zephyr OS build v2.1.99-ncs1  ***
+CEREG: 2,"0BF4","099E5765",9,0,0,"11100000","11100000"
+CEREG: 1,"0BF4","099E5765",9,,,"11100000","11100000"
The MQTT simple sample started
ERROR: getaddrinfo failed 22
ERROR: mqtt_connect -47

Does it clarify?

RE: https_client returning "getaddrinfo() failed, err 9"

Saketaram — Wed, 15 Apr 2020 10:44:36 GMT

I will.

For the record, when I previously used LTE LInk Monitor and set

AT+CFUN=4
AT%XSYSTEMMODE=0,1,1,0
AT+CFUN=1
AT+CFUN?

I got this screen.

Is this related to DNS?

RE: https_client returning "getaddrinfo() failed, err 9"

Håkon Alseth — Wed, 15 Apr 2020 10:27:23 GMT

Hi,

Does your local carrier provide a DNS?

Could you try other examples, like mqtt_simple, to see if this works?

Remember to set "CONFIG_LTE_NETWORK_MODE_NBIOT=y" in prj.conf file before building.

Kind regards,

Håkon