Wifi Fundamentals Lesson 4 Exercise 2 not building, using nrf5340dk with nrf7002ek shield

RE: Wifi Fundamentals Lesson 4 Exercise 2 not building, using nrf5340dk with nrf7002ek shield

Marte Myrvold — Tue, 06 Aug 2024 08:30:43 GMT

Hi,

What host are you trying to connect to? I tested your code with broker.hivemq.com and MQTT Explorer, and it connected successfully.

If you are testing against your own server, can you first check if you are able to connect to it using, for example, MQTT Explorer? Then you can verify that the certificate, username, and password are correct. Depending on the server, you might also need to provide client certificate and key in addition to the server certificate.

Best regards,
Marte

RE: Wifi Fundamentals Lesson 4 Exercise 2 not building, using nrf5340dk with nrf7002ek shield

may_ — Fri, 02 Aug 2024 20:08:08 GMT

I tested with this fix and even though it fixed the wifi connection issue, when I swapped in my own certificate.h file and my MQTT connection username and password, I got these error logs:

[00:00:01.703,186] <inf> Familiar_Central_Hub: Waiting to connect to Wi-Fi
uart:~$

[00:00:00.488,800] <inf> wifi_nrf_bus: SPIM spi@a000: freq = 8 MHz
[00:00:00.488,861] <inf> wifi_nrf_bus: SPIM spi@a000: latency = 0
*** Booting nRF Connect SDK v2.7.0-5cb85570ca43 ***
*** Using Zephyr OS v3.6.99-100befc70c74 ***
[00:00:01.751,586] <inf> Central_Hub: Waiting to connect to Wi-Fi
uart:~$ > wifi_cred add "<redacted>" WPA2-PSK "<redacted>"
wifi_cred add"<redacted>" WPA2-PSK "<redacted>"
uart:~$ > wifi_cred auto_connect
wifi_cred auto_connect
[00:00:17.987,243] <inf> wifi_mgmt_ext: Connection requested
[00:00:23.979,217] <inf> Central_Hub: Network connected
[00:00:23.979,827] <inf> Central_Hub: Connecting to MQTT broker
[00:00:24.016,143] <inf> Central_Hub: IPv4 address of MQTT broker found <redacted-ipv4-address>
[00:00:25.091,033] <err> Central_Hub: MQTT connect failed: 5
[00:00:25.094,940] <inf> Central_Hub: MQTT client disconnected: -111
[00:00:25.094,970] <err> Central_Hub: Error in mqtt_input: -111
[00:00:25.094,970] <inf> Central_Hub: Disconnecting MQTT client
[00:00:25.095,001] <err> Central_Hub: Could not disconnect MQTT client: -128
uart:~$

the only changes I had made were:
1. adding this code to client_init:

static struct mqtt_utf8 username = {

.utf8 = (uint8_t *)CONFIG_MQTT_BROKER_USERNAME,

.size = strlen(CONFIG_MQTT_BROKER_USERNAME)

};

client->user_name = &username;

static struct mqtt_utf8 password = {

.utf8 = (uint8_t *)CONFIG_MQTT_BROKER_PASSWORD,

.size = strlen(CONFIG_MQTT_BROKER_PASSWORD)

};

client->password = &password;

2. and adding these values to the prj.conf

CONFIG_MQTT_BROKER_USERNAME="<redacted>"

CONFIG_MQTT_BROKER_PASSWORD="<redacted>"

3. and adding these values to the kconfig:

config MQTT_BROKER_USERNAME

string "MQTT broker username"

default "<redacted>"

config MQTT_BROKER_PASSWORD

string "MQTT broker password"

default "<redacted>"

can you help me figure out why this is happening?

RE: Wifi Fundamentals Lesson 4 Exercise 2 not building, using nrf5340dk with nrf7002ek shield

Marte Myrvold — Wed, 31 Jul 2024 09:00:58 GMT

Hi,

It seems like CONFIG_POSIX_MAX_FDS had to be increased to 16. I have fixed this in the affected exercises and pushed the fix. Can you test and see if you can connect with the fix?

Best regards,
Marte

RE: Wifi Fundamentals Lesson 4 Exercise 2 not building, using nrf5340dk with nrf7002ek shield

may_ — Wed, 31 Jul 2024 00:19:39 GMT

thank you, looking forward to hearing back from you!

RE: Wifi Fundamentals Lesson 4 Exercise 2 not building, using nrf5340dk with nrf7002ek shield

Marte Myrvold — Tue, 30 Jul 2024 12:04:16 GMT

Hi,

I can reproduce this issue using both nRF5340 DK with shield and nRF7002 DK.
I have forwarded it internally, and the DevAcademy team will look into it.

Best regards,
Marte

RE: Wifi Fundamentals Lesson 4 Exercise 2 not building, using nrf5340dk with nrf7002ek shield

may_ — Sun, 28 Jul 2024 01:32:55 GMT

yes i am able to get the wifi station sample to work.

no, i am unable to connect to a different network in this code, but i am able to connect to a different network on the wifi station sample.

it also looks like the FLASH and RAM usage for the wifi fund lesson 4 exercise 2 code is at 94% for each. i am just building the exact code that is in the github related to this course so would you mind trying to build it with the nrf5340dk board with the nrf7002ek shield and let me know if you get the same error as me in not being able to connect to wifi? i believe this is a bug in the sample code and i'm truly not sure how to fix this! i would really appreciate some suggestions to help guide next steps in regards to fixing this sample code. thank you so much in advance!

RE: Wifi Fundamentals Lesson 4 Exercise 2 not building, using nrf5340dk with nrf7002ek shield

Marte Myrvold — Fri, 26 Jul 2024 12:32:00 GMT

Hi,

Are you able to connect to the network with any of the other Devacademy exercises or one of our samples, for example, the Wi-Fi Station sample?

Are you able to connect to a different network?

Best regards,
Marte

RE: Wifi Fundamentals Lesson 4 Exercise 2 not building, using nrf5340dk with nrf7002ek shield

may_ — Fri, 26 Jul 2024 00:47:53 GMT

hello, this fixed building the app but now i am still unable to connect to wifi and i see this error in the serial monitor:

[00:00:00.487,884] <inf> wifi_nrf_bus: SPIM spi@a000: freq = 8 MHz
[00:00:00.487,945] <inf> wifi_nrf_bus: SPIM spi@a000: latency = 0
*** Booting nRF Connect SDK v2.7.0-5cb85570ca43 ***
*** Using Zephyr OS v3.6.99-100befc70c74 ***
[00:00:00.639,190] <inf> Lesson4_Exercise2: Initializing LED library
[00:00:00.639,282] <inf> Lesson4_Exercise2: Successfully Initialized LED library
[00:00:00.642,913] <dbg> net_sock_svc: socket_service_thread: (net_socket_service): Service WEST_TOPDIR/zephyr/subsys/net/lib/dns/resolve.c:70 has 2 pollable sockets
[00:00:00.643,859] <dbg> net_sock_svc: socket_service_thread: (net_socket_service): Monitoring 2 socket entries
[00:00:00.648,284] <dbg> net_ctx: net_context_bind: (wpa_supplicant_main): Context 0x2001cb14 bind to type 0x888e iface[1] 0x20019878 addr F4:CE:36:00:4F:67
[00:00:01.639,373] <inf> Lesson4_Exercise2: Waiting to connect to Wi-Fi
uart:~$ > wifi_cred add "wifiname" WPA2-PSK "wifipassword"
wifi_cred add "wifiname" WPA2-PSK "wifipassword"
uart:~$ > wifi_cred auto_connect
wifi_cred auto_connect
[00:00:07.781,097] <err> wifi_mgmt_ext: Connection request failed

even though i did not change any code besides adding more logging to prj.conf and i verified that i can connect to my wifi with other devices.

for context i am using an nrf5340dk with an nrf7002ek shield and here's what my build looks like:

i do not have an app.overlay file because i just used the sample code from the course. can you help me figure out why this isnt connecting?

RE: Wifi Fundamentals Lesson 4 Exercise 2 not building, using nrf5340dk with nrf7002ek shield

Marte Myrvold — Wed, 24 Jul 2024 12:36:00 GMT

Hi,

Sysbuild support has not been added to the exercises in this course yet, so please make sure that the "Use sysbuild" option is unchecked when creating the build configuration.

Having this option checked will lead to the errors you are seeing.

Best regards,
Marte