Transfer stops for a few seconds

[Stefan]

Hello!

We have built an app that transfers files from an app on Android to the device running an nRF52 with S132. On the device is an external flash using SPIFFS as a file system. We run an RTOS, but the BLE has highest priority.

About 50% of the times the transfer from the Android app goes very smooth (though slow, more about that later). Other times transfer stops in the middle for about a second, just to continue as nothing happened. We have not found any major problems and it seems random whether the transfer will run smooth or not.

Running DFU transfer/update with the nRF bootloader and the nRF Connect app always runs very smooth.

Is there any tips or tricks or anything else that can be a problem? Any more information that is needed to understand the problem?

Thanks and best regards, /Stefan

[Susheel Nuguru]

sorry for very late reply. Most probably you have solved this problem, If not, It is very hard to say what caused the problem without knowing more about your project. Which RTOS are you using?

[Stefan]

Thanks! We have not solved problem yet. It is still there, but it seems to depend on telephone, connection, etc. No idea. But we have anyhow moved on, the problem is not so pronounced any more, since we managed to increase the transfer speed significantly.

[Susheel Nuguru]

Ok, could you please tell which RTOS are you using ? FreeRTOS?