Pypilot with ST4000 autohelm

[Peter—]

I bought it around a year ago in a box of components:
NOK 8.25  5％ Off | 5PCS 4 Channel IIC I2C Logic Level Converter Bi-Directional Module 5V to 3.3V
https://a.aliexpress.com/_mMirk4H

Some one as in this link...

Won't work - it does not invert the signal.

Jesus Christ !! How complicated can it be...

Ok so the one referred to on the pypilot shop, or maybe even this one:
https://a.aliexpress.com/_mscSpGt

Which should deliver a stable 5V inverted signal as per rs232 standard

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So I think what I’ll try is to use the ESP32, then a max232 inverter chip, then the logic leveler and connect it up to the NMEA. That should work. I really want the wireless solution

Here is a link to the inverter board:
https://a.aliexpress.com/_mNu86bj

Br, Peter