I have a Raspberry Pi 3B+ running Raspbian and tracking ADS-B seems to work fine but when it comes to MLAT I can never get enough power to my Pi. MLAT stops after 5 minutes from boot. I actually have two of them in two different locations, one using POE and the other using standard USB chargers. I’m only concerned about the POE one right now even though both have power issues.
I’ve gone from a 15.4watt POE injector and a 12watt splitter to what I just installed which is a 30watt injector at 52volts and an 18watt splitter (it says 24watts max but that might be at 12v not 5v). I went from a possible 2.4amps to a theoretical 3.6amps if my math is right. Am I doing something wrong or does anyone else have this issue? I even shorted the usb data pins when I made my power cable for the heck of it. I have bluetooth, wifi, and hdmi disabled to save power. The only usb device is the FlightAware Pro Stick Plus.
If I run the “dmesg” command I always see this happening especially on boot and when MLAT hasn’t stopped yet.
Under-voltage detected! (0x00050005)
Voltage normalised (0x00000000)
I can run “vcgencmd get_throttled” and get a response of 0x50000 which means it has been throttled at least once since boot but it isn’t currently throttled and rarely do I get 0x50005 stating it is currently throttled.
I had a Pi 2B running forever which never had MLAT issues except for when I had to use a power bank when the power was out. Had that Pi until I got a mast on the roof and then I broke that Pi so I was forced to upgrade to the 3B+. It kind of bums me out because I went from a perfectly good system hanging out the window to an antenna on a mast with not so cheap hardware and it has never worked as well after the 3B+ “upgrade”.
I’m not sure if I should invest in a higher powered POE splitter again or buy an older Pi or just give up on MLAT all together. I also thought of powering the Pi through GPIO pins.
Sorry for the long post but any comments or suggestions on my situation are appreciated, Thanks!