Hoping someone might have insight into the problem we are having with a new STM32WB55 design that will connect with an iPhone but not a Windows-based laptop.
We have a product using the BLE on the STM32WB55 and it works quite well. We have designed a new product also using BLE on the STM32WB55. The first product I will call the STANDARD. The new product I will call the BASIC.
I have used the following apps to talk to the two products:
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ST BLE Toolbox on an iPhone 14 Plus.
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Bluetooth LE Explorer on 3 different Dell laptops.
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An in-house application on 2 different Dell laptops.
The BASIC unit is using the code from the STANDARD unit.
The results have been:
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The STANDARD unit works fine with all the different apps.
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The BASIC unit:
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Works fine with the iPhone.
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Cannot make a connection with the apps on the laptop.
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Advertises properly.
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Goes through the process of connecting.
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Immediately disconnects after making the connection.
I have validated that both units send the identical commands during the connection process.
The problem shows up at the ACI_GATT_EXCHANGE_CONFIG command.
I have attached two documents with debugging output:
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SWV_ITM_Data_Console-Standard-sync-truncated.txt
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SWV_ITM_Data_Console-Basic-iPhone-Sync-Explorer-comparison.txt
