Brief situation overview:
I have built a RPi4 running TwisterOS, Wine & Box86. I am using the Wiedehopf dump1090-fa installation and directly uploading to several tracker sites, including FR24 and Plane Finder. But, I am running the full Windows version of PlanePlotter through Wine. Eventually, I got everything working correctly. I then bought a second RPi4 and cloned the first SD card. I now have the second running in my loft, aerial on the roof, uploading as stated. The first is in my office and is more for testing / experimenting.
Both are connected to the same external aerial. I use a Uputronics Filtered Preamplifier, then an ADSB signal splitter that was recommended, then one goes into a blue FA dongle and then quality a USB cable to one RPi4, with the other going into a orange FA dongle with FA light blue SMA filter and then a quality USB cable to the other RPi4.
The RPi4 “downstairs” in my office crashes intermittently. Or, rather, it seems to surge and output (at least to PlanePlotter) stops. So far, I have observed that when this occurs the CPU % that dump1090-fa is using increases from about 12% to about 66%.
The unit in my loft has never had this occur.
Checks that I have carried out so far:
- The RPi4 in my office first operated for two weeks in my loft without any failure.
- I have swapped the two USB cables over at the dongles and the problem remains with the RPi4 in my office. (When this failure does not occur, it is interesting that the orange FA dongle picks up slightly more traffic than the blue one, constant with whichever RPi4 is being feed from the orange dongle).
- Obviously, the feed to my office uses a much longer USB cable (albeit of high quality). But, when connected to my Windows laptop and using the Windows version of dump1090, no failures are occurring.
It is my belief that something is causing the CPU % surge, which then remains at about 66%, even though dump1090-fa does not seem to be functioning at that stage.
Any help gratefully appreciated,