BLE - gatt caching

RE: BLE - gatt caching

Hung Bui — Wed, 10 Feb 2021 10:14:14 GMT

Hi Roei,

So when the phone catch the GATT atribute table, it assumes that the peripheral doesn't change the GATT table (services, characteristics) but if when you are developing your application, or if it's the way your application works that it change the service/characteristic structure (the table) then the phone may have an error when trying to use the old table.
If you can capture a sniffer trace we can actually find if there is anything abnormal, or can explain why the connection only last for few seconds.

RE: BLE - gatt caching

Roei — Tue, 09 Feb 2021 15:30:27 GMT

Hi Hung, thank you for your answer.

Can you please tell me about the operating/reflashing of Attribute table?

Regarding sniffer - I didn't catch any special message before disconnection - just regular messages between the devices.

Thanks!

RE: BLE - gatt caching

Hung Bui — Tue, 09 Feb 2021 14:22:34 GMT

Hi Roei,

I don't think GATT caching would cause a disconnection. Did you change the Attribute table when operating/reflashing ?

Please try capture a sniffer trace so that we can inspect what happened over the air.