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  • Case ID: 328917
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How to get the MQTT publisher example working on the nrf7002DK? I also want to test the TLS after that.

Arjun Kariat

Hi,

I am trying to get the MQTT publisher example working on my nrf7002DK board. For this, i have done the following things

- SDK version: 2.6.1

- Board selected: nrf7002dk_nrf5340_cpuapp

- Include the prj.conf, overlay-nrf700x.conf and overlay-sample.conf(not sure if this is required)

- Updated the KConfig entries CONFIG_WIFI_CREDENTIALS_STATIC_SSID and CONFIG_WIFI_CREDENTIALS_STATIC_PASSWORD, with my SSID and password

- Build and run the code

This is my terminal output

*** Booting nRF Connect SDK v3.5.99-ncs1 ***
[00:00:00.465,911] <inf> net_config: Initializing network
[00:00:00.465,911] <inf> net_config: Waiting interface 1 (0x20000888) to be up...
uart:~$
[00:00:30.466,583] <inf> net_config: Running dhcpv4 client...
[00:00:30.466,827] <err> net_config: Timeout while waiting network interface
[00:00:30.466,827] <err> net_config: Network initialization failed (-115)
[00:00:30.466,888] <inf> net_mqtt_publisher_sample: attempting to connect:
[00:00:30.467,285] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:00:33.468,048] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:00:33.968,536] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:00:36.969,299] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:00:37.469,757] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:00:40.470,489] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:00:40.970,977] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:00:43.971,740] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:00:44.472,198] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:00:47.472,961] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:00:47.973,419] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:00:50.974,182] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:00:51.474,670] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:00:54.475,433] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:00:54.975,891] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:00:57.976,654] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:00:58.477,111] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:01:01.477,874] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:01:01.978,363] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:01:04.979,125] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:01:05.479,248] <inf> net_mqtt_publisher_sample: try_to_connect: -22 <ERROR>
[00:01:05.479,248] <inf> net_mqtt_publisher_sample: attempting to connect:
[00:01:05.479,644] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:01:08.480,407] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:01:08.980,865] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:01:11.981,628] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:01:12.482,116] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:01:15.482,879] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:01:15.983,337] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9
[00:01:18.984,100] <inf> net_mqtt_publisher_sample: mqtt_connect: -116 <ERROR>
[00:01:19.484,588] <dbg> net_mqtt_sock_tcp: mqtt_client_tcp_connect: (main): Created socket 9

my prj.conf

CONFIG_NETWORKING=y
CONFIG_NET_SOCKETS=y
CONFIG_NET_TCP=y
CONFIG_NET_LOG=y
CONFIG_MQTT_LOG_LEVEL_DBG=y

CONFIG_NET_IPV6_RA_RDNSS=y
CONFIG_NET_IF_UNICAST_IPV6_ADDR_COUNT=3
CONFIG_NET_IF_MCAST_IPV6_ADDR_COUNT=2

CONFIG_PRINTK=y
CONFIG_STDOUT_CONSOLE=y

# Enable IPv6 support
CONFIG_NET_IPV6=n
# Enable IPv4 support
CONFIG_NET_IPV4=y

# Enable the MQTT Lib
CONFIG_MQTT_LIB=y

CONFIG_NET_CONFIG_SETTINGS=y
CONFIG_NET_CONFIG_MY_IPV6_ADDR="2001:db8::1"
CONFIG_NET_CONFIG_PEER_IPV6_ADDR="2001:db8::2"

CONFIG_NET_CONFIG_MY_IPV4_ADDR="192.0.2.1"
CONFIG_NET_CONFIG_PEER_IPV4_ADDR="192.0.2.2"

CONFIG_MAIN_STACK_SIZE=2048

# For IPv6
CONFIG_NET_BUF_DATA_SIZE=256

CONFIG_NET_SHELL=y

CONFIG_ENTROPY_GENERATOR=y
CONFIG_TEST_RANDOM_GENERATOR=y

my overlay-nrf700x.conf

# Wi-Fi
CONFIG_WIFI=y
CONFIG_WIFI_NRF700X=y
CONFIG_WPA_SUPP=y
CONFIG_NET_L2_ETHERNET=y

# DHCPv4
CONFIG_NET_CONFIG_MY_IPV4_ADDR=""
CONFIG_NET_CONFIG_NEED_IPV4=y
CONFIG_NET_DHCPV4=y

# Connection manager
CONFIG_NET_CONNECTION_MANAGER=y

# Credentials
CONFIG_WIFI_CREDENTIALS=y
CONFIG_WIFI_CREDENTIALS_STATIC=y
CONFIG_WIFI_CREDENTIALS_STATIC_SSID="MySSID"
CONFIG_WIFI_CREDENTIALS_STATIC_PASSWORD="MyPassword"

Parents Reply Children
  • 0 in reply to Arjun Kariat

    Its working thanks a lot Slight smile

    Updated prj.conf

    #
# Copyright (c) 2022 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#
CONFIG_WIFI=y
CONFIG_WIFI_NRF700X=y

# WPA supplicant
CONFIG_WPA_SUPP=y

# Below configs need to be modified based on security
# CONFIG_STA_KEY_MGMT_NONE=y
CONFIG_STA_KEY_MGMT_WPA2=y
# CONFIG_STA_KEY_MGMT_WPA2_256=y
# CONFIG_STA_KEY_MGMT_WPA3=y
CONFIG_STA_SAMPLE_SSID="YourSSID"
CONFIG_STA_SAMPLE_PASSWORD="Your_Password"

# System settings
CONFIG_NEWLIB_LIBC=y
CONFIG_NEWLIB_LIBC_NANO=n

# Networking
CONFIG_NETWORKING=y
CONFIG_NET_SOCKETS=y
CONFIG_NET_LOG=y
# CONFIG_MQTT_LOG_LEVEL_DBG=y
CONFIG_NET_IPV4=y
CONFIG_NET_IPV6=n
CONFIG_NET_UDP=y
CONFIG_NET_TCP=y
CONFIG_NET_DHCPV4=y

CONFIG_NET_PKT_RX_COUNT=8
CONFIG_NET_PKT_TX_COUNT=8

# Below section is the primary contributor to SRAM and is currently
# tuned for performance, but this will be revisited in the future.
CONFIG_NET_BUF_RX_COUNT=16
CONFIG_NET_BUF_TX_COUNT=16
CONFIG_NET_BUF_DATA_SIZE=128
CONFIG_HEAP_MEM_POOL_SIZE=153600
CONFIG_NET_TC_TX_COUNT=1

CONFIG_NET_IF_UNICAST_IPV4_ADDR_COUNT=1
CONFIG_NET_MAX_CONTEXTS=5
CONFIG_NET_CONTEXT_SYNC_RECV=y

CONFIG_INIT_STACKS=y

CONFIG_NET_L2_ETHERNET=y

CONFIG_NET_CONFIG_SETTINGS=y
CONFIG_NET_CONFIG_INIT_TIMEOUT=0

CONFIG_NET_SOCKETS_POLL_MAX=10

# Memories
CONFIG_MAIN_STACK_SIZE=4096
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
CONFIG_NET_TX_STACK_SIZE=4096
CONFIG_NET_RX_STACK_SIZE=4096

# Debugging
CONFIG_STACK_SENTINEL=y
CONFIG_DEBUG_COREDUMP=y
CONFIG_DEBUG_COREDUMP_BACKEND_LOGGING=y
CONFIG_DEBUG_COREDUMP_MEMORY_DUMP_MIN=y
CONFIG_SHELL_CMDS_RESIZE=n


# Kernel options
CONFIG_ENTROPY_GENERATOR=y

# Logging
CONFIG_LOG=y
CONFIG_LOG_BUFFER_SIZE=2048
CONFIG_POSIX_CLOCK=y

CONFIG_NET_CONFIG_MY_IPV4_ADDR="192.168.1.99"
CONFIG_NET_CONFIG_MY_IPV4_NETMASK="255.255.255.0"
CONFIG_NET_CONFIG_MY_IPV4_GW="192.168.1.1"

# printing of scan results puts pressure on queues in new locking
# design in net_mgmt. So, use a higher timeout for a crowded
# environment.
CONFIG_NET_MGMT_EVENT_QUEUE_TIMEOUT=5000

#MQTT
CONFIG_MQTT_LIB=y
CONFIG_MQTT_LIB_TLS=y
CONFIG_NET_SOCKETS_SOCKOPT_TLS=y
CONFIG_MQTT_KEEPALIVE=5
CONFIG_MBEDTLS_ENABLE_HEAP=y
CONFIG_MBEDTLS_HEAP_SIZE=81920
CONFIG_TLS_CREDENTIALS=y
CONFIG_MBEDTLS_RSA_C=y
CONFIG_PSA_WANT_KEY_TYPE_RSA_PUBLIC_KEY=y
CONFIG_PSA_WANT_RSA_KEY_SIZE_2048=y

    For nrf7002DK board:

    • Board selected: nrf7002dk_nrf5340_cpuapp 

    For nrf7002EK Board

    • Board selected: nrf5340dk_nrf5340_cpuapp 
    • Extra Cmake Argument: -DSHIELD="nrf7002ek"
  • 0 in reply to Arjun Kariat

    Hi,

     

    Arjun Kariat said:
    Its working thanks a lot Slight smile

    Great to hear that it is working as expected! Always happy to help out.

     

    Hope you have a wonderful day!

     

    Kind regards,

    Håkon

  • 0 in reply to Håkon Alseth

    Hi @

    I was trying to add TLS client certificate support to this code. i am getting an error

    [00:00:10.666,046] <inf> mqtt: Connecting to MQTT broker
[00:00:11.825,683] <err> net_pkt: Data buffer (1035) allocation failed.
[00:00:11.825,714] <err> net_tcp: conn: 0x20050ba4 packet allocation failed, len=987
[00:00:11.973,724] <err> net_pkt: Data buffer (1110) allocation failed.
[00:00:11.973,754] <err> net_tcp: conn: 0x20050ba4 packet allocation failed, len=1062
[00:00:12.177,917] <err> net_pkt: Data buffer (1110) allocation failed.
[00:00:12.177,917] <err> net_tcp: conn: 0x20050ba4 packet allocation failed, len=1062
[00:00:12.177,917] <err> net_tcp: TCP failed to allocate buffer in retransmission
[00:00:12.656,158] <err> net_pkt: Data buffer (1110) allocation failed.
[00:00:12.656,158] <err> net_tcp: conn: 0x20050ba4 packet allocation failed, len=1062
[00:00:12.656,158] <err> net_tcp: TCP failed to allocate buffer in retransmission
[00:00:13.323,364] <err> net_pkt: Data buffer (1110) allocation failed.
[00:00:13.323,364] <err> net_tcp: conn: 0x20050ba4 packet allocation failed, len=1062
[00:00:13.323,364] <err> net_tcp: TCP failed to allocate buffer in retransmission
[00:00:14.273,559] <err> net_pkt: Data buffer (1110) allocation failed.
[00:00:14.273,559] <err> net_tcp: conn: 0x20050ba4 packet allocation failed, len=1062
[00:00:14.273,559] <err> net_tcp: TCP failed to allocate buffer in retransmission
[00:00:15.648,803] <err> net_pkt: Data buffer (1328) allocation failed.
[00:00:15.648,803] <err> net_tcp: conn: 0x20050ba4 packet allocation failed, len=1280
[00:00:15.648,834] <err> net_tcp: TCP failed to allocate buffer in retransmission
[00:00:17.661,041] <err> net_pkt: Data buffer (1328) allocation failed.
[00:00:17.661,041] <err> net_tcp: conn: 0x20050ba4 packet allocation failed, len=1280
[00:00:17.661,071] <err> net_tcp: TCP failed to allocate buffer in retransmission
[00:00:20.629,272] <err> net_pkt: Data buffer (1328) allocation failed.
[00:00:20.629,302] <err> net_tcp: conn: 0x20050ba4 packet allocation failed, len=1280
[00:00:20.629,302] <err> net_tcp: TCP failed to allocate buffer in retransmission
[00:00:25.031,494] <err> net_pkt: Data buffer (1328) allocation failed.
[00:00:25.031,494] <err> net_tcp: conn: 0x20050ba4 packet allocation failed, len=1280
[00:00:25.031,524] <err> net_tcp: TCP failed to allocate buffer in retransmission
[00:00:31.584,716] <err> net_pkt: Data buffer (1328) allocation failed.
[00:00:31.584,747] <err> net_tcp: conn: 0x20050ba4 packet allocation failed, len=1280
[00:00:31.584,747] <err> net_tcp: TCP failed to allocate buffer in retransmission
[00:00:31.837,738] <err> mqtt: Error in mqtt_connect: -5

    This is my updated code: /cfs-file/__key/communityserver-discussions-components-files/4/2570.wifistaMqtt.zip

    Please let me know if you want any thing else

    in brief

    i added the client certificate as well as the private key files

    static const unsigned char ca_certificate[] = {
#include "mosquitto_ca_cert.h"
};

static const unsigned char client_certificate[] = {
#include "mosquitto_client_cert.h"
};

static const unsigned char priv_key[] = {
#include "mosquitto_priv_key.h"
};

    I have called the tls_credential_add as shown below

        // CA Certificate
    err = tls_credential_add(MQTT_TLS_SEC_TAG, TLS_CREDENTIAL_CA_CERTIFICATE, ca_certificate, sizeof(ca_certificate));
	if (err < 0)
    {
		LOG_ERR("Failed to add TLS credentials CA Certificate, err: %d", err);
		return err;
	}

	// Client Certificate
    err = tls_credential_add(MQTT_TLS_SEC_TAG, TLS_CREDENTIAL_SERVER_CERTIFICATE, client_certificate, sizeof(client_certificate));
	if (err < 0)
    {
		LOG_ERR("Failed to add TLS credentials Client Certificate, err: %d", err);
		return err;
	}

	// Private Key
    err = tls_credential_add(MQTT_TLS_SEC_TAG, TLS_CREDENTIAL_PRIVATE_KEY, priv_key, sizeof(priv_key));
	if (err < 0)
    {
		LOG_ERR("Failed to add TLS credentials Private Key, err: %d", err);
		return err;
	}

    Updated the Broket Port to 8884

    I have used this link to create the client certificate: test.mosquitto.org/.../

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