Receive random data after connect

RE: Receive random data after connect

awneil — Tue, 27 Oct 2020 20:32:07 GMT

[quote userid="17294" url="~/f/nordic-q-a/67251/receive-random-data-after-connect/277245#277245"]it shows incompatible error[/quote]

not sure what you mean by that?

[quote userid="17294" url="~/f/nordic-q-a/67251/receive-random-data-after-connect/277245#277245"] I just filter out the random value, everything else is fine[/quote]

OK - jolly good

RE: Receive random data after connect

sonnyz — Tue, 27 Oct 2020 19:54:42 GMT

Thank you awneil! Just got time to test with your suggestion, but it shows incompatible error. Never mind, I just filter out the random value, everything else is fine.

RE: Receive random data after connect

awneil — Fri, 16 Oct 2020 13:12:13 GMT

Are you sure that write is to your Service/Characteristic ?

Check p_ble_evt->evt.gatts_evt.params.write.uuid

RE: Receive random data after connect

sonnyz — Fri, 16 Oct 2020 13:00:25 GMT

Thank you Awneil!

I use this to receive data from the phone:

case BLE_GATTS_EVT_WRITE:     //receive data from the phone
{
    uint8_t * p_data = p_ble_evt->evt.gatts_evt.params.write.data;
    //printf("received data: %d  %d...", p_data[0], p_data[1] ....);  //18 data
}

It shouldn't have uninitialized variables issue. From the debug, I can see that the first data packet (18 data) is always something else then what I have sent from the phone, the real data start from the 2nd packet.

RE: Receive random data after connect

awneil — Thu, 15 Oct 2020 15:25:10 GMT

https://www.argenox.com/library/bluetooth-low-energy/ultimate-guide-to-debugging-bluetooth-smart-ble-products/

How are you sending the data ?

What debugging have you done to see what's going on?

Have you checked for uninitialised variables?