strange behaivour

[skyeyedoc]

   

Looks interesting, which motor controller are you using?

I've ordered two vnh2sp30 on sepparate stores in aliexpress first, but both not worked (it is moved forward, but no reverse. Current sensing works ok)
Then i bought IBT_2 board with BTS7960 chips in local store

It is huge with radiator but works fine in both directions (after slight modification of motor.ino). Current sensing working as well.

My initial setup is Raspberry PI 3B+ with mpu9255 based imu and Arduino Nano for motor controller and rudder sensor (potentiometer already linked to quadrant by PO). 
For the first time i am using one big enclosure for everything (except IMU) and going to place it in cockpit near wheel. But in future i hope to place Raspberry to somewhere in nav vstation.

Month ago i have sailed from eastern side of Japan to South Korea. It is only 600nm but it was like nightmare doing it without autopilot. 
Next month i am going to do next passage -  from Korea to Vladivostok
so, i really crossed my fingers for new autopilot will work and i hope to debug it underway
Also i am going to try AIS reception with SDR USB stick

Hello!
I'm really glad to read your notes, as I'm at the point where I need to find a motor-controller.  The IBT_2 looks very promising! I just ordered one from Amazon for $12. I'd really like to know what modifications you made to motor.ino to make it work. And it would be great if you take notes and share them as you go through the debugging work.

My IMU is mounted on an AIS receiver hat, which in turn is on an RPi3B+. I'm thinking of  positioning the motor controller mounted dry in the binnacle, and commanding it remotely via wifi.  The RPi will be very dry, mounted at the pilot's station below decks.

I don't have a plan yet for how to command the motorcontroller, except that it will entail some kind of serial network tunnel via a discrete port with no other traffic on it. Also, some kind of handheld remote at the binnacle to bump it left or right: maybe a 315mHz type 4-button generic.

My motor is from an old Autohelm 3000, which this system will replace.

You are indeed a very salty sailor, and your English is fine. Thank you for sharing!