FTDI custom device stops receiving data on some (newer) Android devices

[janimm]

I'm working on a custom FTDI serial device with 921600 baud rate. The serial connection works very well, is fast and stable. Recently we encountered newer, lower spec Android devices that receive data for couple of seconds and then just stops receiving any data.

Some testing on different devices:

Works:

• Samsung Galaxy Tab A (2016), Android 8.1.0
• Nokia X20, Android 13
• Samsung Galaxy Tab S6, Android 12
• Huawei BG2-WD9. Android 6.0 (ultra low spec device)

Data stream stops intermittently:

• Samsung Galaxy Tab A8, Android 13

I'm using SerialInputOutputManager with newSingleThreadExecutor to receive the data from the device. There is no debug messages/exceptions, data stream just stops.

[kai-morich]

maybe some android kernel usb receive buffer overflow?

[janimm]

Hard to say, don't see anything related on logcat.

Any tips how to troubleshoot this?

[kai-morich]

not really

[janimm]

Ahh, the never ending adventure of Android app development.