Hi,
My product is undergoing susceptibility test and strange issue is happening after the test for 1-2 hours, ie while trying to send data with higher MTU size notification, BLE is getting disconnected. but while sending smaller mtu size doesn't cause any problem(18 bytes).
The device recovers this issue after 1-2 hours, ie no issues in sending higher mtu sized notifications.
My device stores some data in an external FLASH and which is sent through BLE with higher MTU size(90). the functionality has been tested and it was working fine.
Also note that all other functionalities of the device is working as expected except sending data stored in flash.
Susceptibility test details:
Radio : 1-6 ghz, filed strength 10 V/m
duration: 25 minutes.
BLE:
softdevice version: 5.0.0-2.alpha_softdevice
Notification size: 90 bytes
connection interval : 50-60 ms
Board used: nrf52840 based custom board.
Has anyone experienced similar issues? i couldn't figure out what is causing this problem.(eihther hardware issue or softdevice issue or the firmware issue)
i couldn't look at any softdevice error codes as my set up didn't had any debugging setup at the place of testing.
Any help/suggestions will be much helpful for me at this crucial point of my project.
Thank you advance for your time.
