Connection state change error :8 in some devices

[ved]

Hi.. i am using nrf52 and my custom made android application. softdevice is 132. in that am able to do DFU for application file with android master control panel. i used Android DFU library at my custom app. i created application .zip file using nrfutil.exe.

but in some device DFU application works and in some device it is not working. i tested my custom android app in MOTO E, MOTO G3, ASUS, MI 4i, NEXUS android phone. it is working on MOTO and ASUS . it is not working on NEXUS and MI and some time also MOTO and ASUS.

here is my log file for custom app..Android_Log.txt

[ved]

Hi.. is there anyone can help me to find solution? thank you

[run_ar]

Do you have an HCI log? I assume the connection is timing out for some reason?

[ved]

Hi.. @run_ar thanks for reply i don't have HCI Log. but it works fine for Android MCP. it is not working in nrf toolbox app and my custom android app. is there MIN_CONN_INTERVAL and MAX_CONN_INTERVAL can create this issue for dfutarg?

[run_ar]

You can get the HCI logs using Android Developer settings. I think we need to see what is going on prior to the timeout.