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audrey38
Associate
July 11, 2023
Question

Random BLE connection fail on STM32WB

  • July 11, 2023
  • 1 reply
  • 1722 views

Hello all,

We are developing a product that connects to a mobile application through BLE. Sometimes, not all the time, the product does not connect to the smartphone the first time, it retries to connect until it gets there. As a consequence, the connection is sometimes quite long, which is not acceptable. By using a BLE connection app on the smartphone (LightBlue), we can see that some connection does not succeed:

audrey38_0-1689064299779.png

In your opinion, what is the reason for this? I tried to switch from clock LSE to HSE but it doesn’t change anything. Could we have conflicting timing (advertising/connection)?

It seems that it is the physical layer that refuses the connection. Is there something to change in the configuration of the BLE stack? We have used the Heart rate example provided by ST to write our code.

Sincerely,
Audrey

This topic has been closed for replies.

1 reply

Remy ISSALYS
Remy ISSALYS
ST Technical Moderator
July 27, 2023

Hello, 

Are you able to perform air trace to see what's happens when the connection failed? Did you same the same behavior when using BLE_HeartRate example without any modification? If not, can you describe a bit more the modification that you have performed? 

Best Regards

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