My first Live demo of a Wifi solar- and battery monitor in OpenPlotter

[shark24]

1 - is to start with the hardware and how to solder and flash it. Ok i can take a cable and a 1$ RSS 485 adapter for one euro but will not run with raspberry because of the drivers and i have to go anyways via the virtual port. In fact i do not have a Item to connect via NMEA 2000 and here i need a 66 $ stick or something like actisense for mor than 100 $.
This can be done with a virtual COM anyways. I have no chance to prove this for now but the esp is it worth to give this way a try.

The "new" ESP32 has CAN on board btw.

3. Its more easy to learn how to with videos and you have to see them in combination. And at the german resources i did try to show in german videos how i was working for because the english videos are linked inside the description.

I'm a native German speaker and your videos aren't that helpfull to me. I appreciate your affort but the quality is quite poor in respect of an educational purpose.

4. My vessel is 10 meters and its enough to make there a home automation solution. I am not in a Marina and do not have Land electricity. It will be placed in danube delta at least to a village where there is no street. And for now its not clear i have Internet connection that give me status reports when i am in germany. Alexa is something to play yes because i am using since years TTS and STT with google and if there is Internet than i can go the MQTT way.

10m is quite cosy I would think about home automation for +50ft but again thats my personal opinion.

for navigation openplotter with the kap files in european rivers is not much helpful but there is no influence because of opencpn. i guess openstreetmap and tiles is more helpfull in combination with openseamap.

I agree on this, like I told you in your older thread about the river maps.

Yours concept works as long you have internet with MQTT. With FHEM and a normal phoneline it will work without. I saw a lot of discussions this summer. People on the boat, roaming did not work and they get no new sim on their way for days and sometimes for weeks and this in the netherlands and on the way to berlin.

MQTT is just a protocol! You dont need Internet to use: MQTT https://de.wikipedia.org/wiki/MQTT

So i do not know how to start. What doing first?

Read basic node-red tutorials and work your way to write/read to/from a DB. Read about the dashboard and try to display your data.