Sounds like you should not be using QSerial and instead design a custom solution outside of Qt. Qt is not for real-time processing and your description of the task seems to imply real-time constraints.

@jsulm It's alright. I ended up going completely asynchronous by using a chained callback structure. Thanks anyways for the help!

Hello @raven-worx, Yes you are damn right. Saving is synchronous. The problem i was facing is that i checked just after save if the image was written. Apparently it takes some times for the image to be written on disk. I use QTRY_VERIFY_WITH_TIMEOUTand it solved my problem. Thanks again

@SGaist Hi. Thank you for your help. I'll give it a try, but I still don't get why my code doesn't work... If anyone could take a guess, I'd appreciate.