Connection handle 16 and 19

[Daniel Reisfeld]

Hi,

I get BLE_GATTS_EVT_WRITE with connection handles 16 and 19 which seems to be some defaults of the softdevice.

Can you explain the source and usage of these connection handles?

Thanks,

Daniel

[Hung Bui]

Hi Daniel, 

Which example are you testing ? 

Are you asking about connection handles or attribute handles ?

Could you show some log or sniffer trace ? 

[Daniel Reisfeld]

Hung,

The nrf52840 is the peripheral and server. The phone (using Web bluetooth) writes the 0x2902 upon connection and before disconnecting. I haven't defined explicitly this service. I wonder which services are implicitly defined by the Softdevice.

Thanks,

Daniel

[Hung Bui]

Please provide the service UUID (0x2902 is only the UUID of the CCCD, not the service UUID). 

If you don't want to send the sniffer trace, you can use nRF Connect app on PC and do a service discovery of the attribute table, something like this: 

If you want you can convert this case to private (GO PRIVATE) if you have confidential information.