Occasionally wrong positions for AIS targets
Every now and then I see in freeboard AIS targets whose track contains erroneous positions. The track in general looks plausible, but it contains some position samples that are obviously wrong. Attached two screenshots of a case that I see right now. The track of one the vessels on a offshore anchoring location jumps to locations hundreds of miles away.
CAN works, then don't!
My CAN connection is all fine and dandy on start-up, but after a while it fades with only a few connections, only to die. Anyone experienced this or have an idea for trouble shooting?
Restarting the Pi restarts the CAN connection. Restarting SignalK server doesn't....
optocoupler question
I am trying to read engine RPMs on an ESP32 board with sensESP.
I have a simple optocoupler board (https://www.amazon.ca/dp/B09TF7LKVF schematic included).
Do I understand correctly that in first approximation, if V+ >> V-, then VOUT=0 but if V+ << V- then VOUT=-VCC (i.e. that 3-4 behaves like a 0Ohm resistor if V+>V- and an almost infinite resistor if V+,V-) regardless of the actual voltage?
If this is the case, VCC needs to match the logic voltage of my board (i.e, 3.3V for an ESP32 or 5V for an arduino), right?...
