2019-01-07, 03:03 PM
I notice you have a Quark-Elec box there. You could potentially sell that one and purchase their AIS/GPS/SEATALK box. It's excellent. Another way if you still have a Raymarine repeater in your Seatalk bus like an ST-60, is to look for the NMEA output on them. Many of them that used the old original SEATALK had NMEA outputs. I found on my ST-60+ display output I had to write a Node-Red script to add checksum.
If all that fails, I agree with the brain-trust here: take the output from the sensor directly into an Arduino or ESP, count the pulses and determine speed and log from that. Arduinos can be made to read 9-bit data with a modified Serial module, but it also requires changing levels and ideally optical isolation.
If all that fails, I agree with the brain-trust here: take the output from the sensor directly into an Arduino or ESP, count the pulses and determine speed and log from that. Arduinos can be made to read 9-bit data with a modified Serial module, but it also requires changing levels and ideally optical isolation.