Random disconnect LG G3 timeout (disconnect reason in Android 0x08)

[Vladimir]

Hi,

I read a lot of questions but problem still wasn't fixed. Random disconnect have the period 5-10 mins. The problem with s132 or s130 v2.0.1 and LG G3 android 5.0. Older versions of sdk's with LG don't have this problem. Other smartphones don't have that problem with devices on sdk11. I used snifer to understand what's happend, but only what I saw that device missed empty pdu. Packet crc and sequence number is ok.

Clock settings: 

.source = NRF_CLOCK_LF_SRC_RC
.rc_ctiv = 16
.rc_temp_ctiv = 2
.xtal_accuracy = NRF_CLOCK_LF_XTAL_ACCURACY_20_PPM

Used microcontrollers: nrf52832, nrf51

Have you any idea why microcontroller lost a packet and how to fix it? Is it softdevice problem?

Thanks.

[Hung Bui]

Hi Vladimir, 

 

Please clarify the SDK version, softdevice version of the new and old firmware. 

Please attach your sniffer trace .

 

Please tell if you have same problem when testing the stock example in the SDK

 

When you move to new SDK, there is a chance that it support new feature but you don't handle them in the code causing a crash. (Long MTU for example)

 

[Vladimir]

Hi,

We used SDK 7 wich has no problem. But when we start to use SDK11 we meet this problem. With heart rate example I had the same problem (s132 v2.0.1).

[Hung Bui]

Hi Vladimir,

Please provide a sniffer trace. Please be aware that our current SDK is v15. 

Also please check the disconnect reason when you received a DISCONNECTED event on the device. 

[Vladimir]

Thanks, Hung Bui.

On the snifer data everything is ok. LG G3 has some fault wich affect on ble. We checked with other sdk version and had the same issue. There is no fault with sdk or firmware, just smartphone sometimes  stops communicate with the device.