Cant get data from smartwatch on application using ble extension

Hello everyone currently i am working on ble exyension project i want to get data like heart rate from my smart watch i can connect my watch but cant get the data anybody who knows how to deal with it help me

You probably need to contact the manufacturer of the watch. They may have an SDK on their website.

I't's also possible that they have a 'closed deal' with the supplier of their own App and don't allow any other App to interact.

okay
thanks.