how can i hold a characteristic （permission :readable only） by a variable

[fanqh]

i want to add a characteristic readable that hold a device TimeCount; timeCount is increasing;

ble client (andorid) can read the characteristic at any time;

how can i know the read action; how can i synchronize the characteristc wiht a variable(the device timeCount)

[MartinBL]

Hi. I believe you can find the answer to your question here: Question about read operation

and here: Event related to read request on characteristic