writing a value to the client characteristics configuration descriptor

Question

writing a value to the client characteristics configuration descriptor

sitikanthaz opened this issue 7 years ago · 4 comments

I am writing an app to enable notification on glucose measurement characteristics but it will only work if I enable the CCCD. unable to write a value to that descriptor. plz help

Answer 1 · 2018-02-09T11:53:13.000Z

On your Characteristic instance you can use .enable_notifications().

Answer 2 · 2018-02-09T12:07:59.000Z

I am doing that but it's not receiving anything from the server i.e. glucometer. the characteristic_value_updated() is not showing any values. do I have to write anything to the descriptor handle 2902 to enable this notification?

Answer 3 · 2018-02-09T16:10:02.000Z

Any info or example on this? how to write to a descriptor handle? when I try to write using write.value() it shows "operation not supported" error. and from the documentations of bluetooth glucose profile I found out that i have to pass '01' to this uuid 2902 which is a descriptor after which notifications will be enabled. Any development on this plz share.

Answer 4 · 2018-02-09T18:42:45.000Z

I got it resolved now. the bluez program does enable the CCCD for notifications by default and you don't have to write anything to the CCCD handle anymore. I got confused by the old documentation of bluetooth profile. My bad :) . closing this