Comment by andry_ad

@blutack, I can confirm this - I recently purchased a treadmill homeTro 3.0HP and it has a third-party Bluetooth Module UART module from https://www.fitshow.com/. It seems fitshow developed this module and white-label apps to add smart features to the treadmill and other fitness devices. I cannot confirm if it's microchip UART to BLE because since I would have to desolder it, I successfully connected UART at 4800 baud: https://pastebin.com/NCiQwr8T

If anyone knows how to decode FitShow UART protocol or has some ideas, please share your thoughts :)