nRF8001[server] Device disconnected after 10 minutes automatically?

[gbiradar]

"Hi Guys, my nRF8001 BLE is working perfectly, But recently i was performing regression testing to check BLE connection, their i faced one issue after 10 minutes from nRF8001[server] device disconnected message received on nRF master control Android APP. i tried this many times same issue came. i don't want device disconnection from server. How do i prevent this disconnecion. For power saving i have my own user API function to let server goto sleep.

regards, gbiradar"

[Anders Strand]

Hello. Is the timing of the disconnect the exact same every time? Do you have another nRF51 device you can set up as an nRF Sniffer?

It would also help with some debug printing of events leading up to the disconnect.

[gbiradar]

Hi @Anders Strand, Timing is same(After looking in Verbose message in APP, time stand around 9M50Sec to 9M56Sec), as i tried multiple times, i don't have any other nRF device to act as sniffer. Debug messages from APP.

[Server]Server started

gatt=device.connectGatt(autoconnect = false)

[Server Callback]Connection state changed with status: 0 and new sate:Connected

[Callback]Connection state changed with status: 0 and new sate:Connected

wait(600ms)

gatt.discoverServices()

[Callback]Services discovered with status: 0

services discovered

and soon

[Server callback] Connection state changed with status: 0 and new state:DISCONNECTED (0)

[Server]Device Disconnected

[Callback]Connection state changed with status: 0 and new state:DISCONNECTED (0)

"Disconnected"

"gatt.refresh()"

"gatt.close()"

[Anders Strand]

What device are you using to control the 8001? Can it be the case that this device has an error? Maybe a timer value that loops around and becomes zero after 10 minutes?

[gbiradar]

PIC18F microcontroller, Coming to timer i don't think so, because the timer which i'm using act as counter. the moment it overflow i'm adding new offset value to its timer register.

[David Edwin]

Can you give us the SPI messages on the nRF8001 interface. This will help us to understand what is happening on the link without a sniffer.