Hi
I have a problem with receiving / transmitting a packet of characteristics with a descriptor 2902 (CCCD 2902).
The principle of operation of my program is that the device on the peripheral side wakes up and falls asleep. At the time of waking up the central device (smartphone with Android OS) is connected to the peripheral device. If the connection is normal, then the peripheral device transmits the required number of packets and falls asleep.
The problem is that in some cases, the CCCD with the code 2902 is not sent from the Android side, which notifies that the transfer will be in the "notification" mode. Since the peripheral device did not receive cccd, it does not start sending data.
I assume that this is a problem on the android side, since there are no errors on the peripheral side. Am I guessing right? And can you explain what could be the problem?
The following are snapshots of logs that were made on the side of the phone (hci_snoop):
(lines: 187531 - cccd was sent; 187536 - a response was received from the peripheral device; 187544 - start receiving data.)
(lines: 187527 - personal data has been sent; 187530 - an answer was received that the data was successfully received.)
(lines: 188158 - 188163 - personal data was sent and a response was received, after that there is no cccd sending and the program hangs on it. This happens in a different connection.)
Chip: BT840F (analog nRF52840);
SDK: nRF5_SDK_15.2.0;
Softdevice: s132_nrf52_6.1.0_softdevice;
Android OS: 8.1.
Thanks in advance for your help.
