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Starmaxou
Starmaxou
Associate
August 24, 2020
Solved

Unable to discover GATT services on STM32WB55 BLE server (P-NUCLEO-WB55).

  • August 24, 2020
  • 2 replies
  • 1480 views

Hello,

I am trying to use the STM32WB55 Nucleo Pack to develop a BLE application. I am using cubeMX with the STM32Cube_FW_WB_V1.8.0 pack to generate code for the MB13355C nucleo board with STM32WB55RGV6 MCU.

I have successfully set the BLE advertising settings and can read the ad with the nRF Connect app on my smartphone. But when I tried to connect my phone to the board, I couldn't get GATT services back. However the connection is successful because the card indicates to be connected as a server.

Has anyone ever had this problem? And how can I solve it?

Thank you for your reply!

This topic has been closed for replies.
Best answer by HSpre.1

Are you sure you have set up clock settings to use external 32khz crystal and NOT LSI. Timing is not good with LSI. I made this mistake that is why is am suggesting it.

2 replies

HSpre.1
HSpre.1Answer
Associate II
September 8, 2020

Are you sure you have set up clock settings to use external 32khz crystal and NOT LSI. Timing is not good with LSI. I made this mistake that is why is am suggesting it.

Starmaxou
StarmaxouAuthor
Associate
September 24, 2020

Thank you ! I changed the clock settings to use LSE and it works fine.

MDaub.1
MDaub.1
Associate III
November 5, 2020

Could you please show me where exactly to set this?

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