(2025-05-17, 06:02 AM)sebba Wrote: (2025-05-14, 10:26 AM)mikekolling Wrote: Ok, update
Have been running it at home on clean AC 12V PSU since the weekend. The Maiana running on its own has crashed a few times and normally needs a period of power off (normally greater than 30mins) and then will fire up again. Its deceptive as you think its not running but it takes a few minutes to start up. When you first switch it on, the AIS led flickers very briefly, if you see that - its pretty certain its going to fire up.
I hope is a DC 12v PSU, not AC.
What AIS LED? How is connected? How do you know it's crashed? Are you using some NMEA adapters? Or the UART2USB breakout?
Please let us know the entire configuration/connections you made.
Is it difficult to debug it without complete information.
Well it would have blown up long ago if it wasnt 12V!!
I have used grafana to chart the Maiana A and B Noise at home and now on the boat and to be honest its lower on the boat.
AIS Transmitting LED
I was using the USB Breakout initially at home but then went back to the Macarthur as it did not make any difference.
I am now back on the boat, and again all day yesterday worked well, switched off the end of the day, Switched on this morning and the Maiana is dead again.
I did have a Breakout RJ45 circuit to cut the power (attached to this post) but that did not help.
Only thing that worked was physically disconnecting the RJ45, wait 30secs and then plug in again.
I know you have mentioned Earth Loops before but i cannot see how there would be a loop, EVERYTHING here is from the same 12V power supply, the RPI and via the Macarthur hat, the Maiana.
So how can there be a loop?
I did also try moving the Maiana antenna to other areas of the boat eg right on the transom, right on the bow, etc and that did not make any difference either.
