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BBecs.1
BBecs.1
Associate II
July 1, 2020
Question

How to send data via WiFi through a softAP?

  • July 1, 2020
  • 5 replies
  • 2493 views

Hello,

I am struggling to send data via a softAP over WiFi. Setting up the softAP and connecting to it from another device works well. Now, I would need to bind the newly created socket to the desired port and that's where it fails for me. I don't know if I am approaching the problem quite correctly. In my understanding, I would need to then listen on that port for a connection from another device and then either send or receive data through it. Thank you for your help. Source file is attached.

Sincerely,

Barna Becsek

This topic has been closed for replies.

5 replies

Guillaume K
Guillaume K
ST Employee
August 25, 2020

Hello

Could you precise which STM32 / board you are using ? is it B-L475E-IOT01 with Inventek WiFi module ?

what function fails exactly ?

do you have a log ?

if you are using B-L475E-IOT01 it would be nice to have a trace of the AT commands sent to the Inventek WiFi module (and the answers).

it's in Drivers\BSPv2\Components\es_wifi\es_wifi.c, add #define ES_WIFI_DEBUG_MODE.

the AT command traces are printed with ES_WIFI_DEBUGCMD macro in AT_ExecuteCommand()

Guillaume

Cvega.11
Cvega.11
Associate II
October 4, 2020

hello my friend

I managed to configure the module with the stm32cubeide editor with the only drawback that sometimes it loads the page and sometimes it doesn't

I don't know where I have to modify the response times

timeout??

BBecs.1
BBecs.1Author
Associate II
October 5, 2020

Dear @Cvega.1​ ,

thank you for your help. As far as I understood thought you are connecting to an existing wifi network. I would really like to create my own software access point and have others connect to it.

BBecs.1
BBecs.1Author
Associate II
October 5, 2020

Dear @Guillaume K​ ,

I was using the STEVAL-WINKT1 with the ISM43362 Inventek WiFi module.

What does not work is binding a TCP socket to a port for communication. I was able to have devices join the network, but in order to exchange data, I would need to have an open socket which is bound to a certain port and listen on that port for incoming communication.

Additionally, there is this known (unresolved?) bug with the mentioned WiFi module, which unfortunately I only saw after purchasing it

https://community.st.com/s/question/0D50X0000BdfmuaSQA/soft-ap-does-not-work-with-the-cube-example-for-bl475eiot01a-with-ism43362

I have in the meantime moved to another manufacturer, as was suggested to me by someone from ST. There, I was in fact able to make it work.

Cvega.11
Cvega.11
Associate II
October 7, 2020

To which module did you switch friend, you tried this example on your board, did it serve 100?

https://os.mbed.com/teams/ST/code/DISCO_L475VG_IOT01-wifi_http_server/file/a544e9eba8fb/main.cpp/

I implemented the example mentioned for another stm32 board but I just turned off the led and it turned on twice and then I no longer have access to the web server with the ip the page fell

I want to know if for the DISCO_L475VG_IO 1A board it works or fails the same?

Should I update the firmware?

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