I have no programming experience and a novice when it comes to this sort of thing. I have setup a raspberry pi with a 7 inch touch screen. That is working with my multi (with MK3 adapter) so far (mppt and bmv soon with USB adapters). I have a camper van with three tanks:
30 gallon fresh water
10 gallon waste water
5 gallon diesel (with resistive tank sender)
I'd like to add external tank senders to each of the other tanks and get them to show up on the venus. The external tank senders are digital that send 0-5V. Another user has this https://www.ferriellosales.com/monitoring-systems.html but he made some complex board to take that signal and convert to a resistive value: https://github.com/aaronsb/Arduino/blob/master/tankmonitor/Readme.MD
That's pretty amazing but probably way WAY above what I would be able to cobble together. He mentions writing a dbus driver. Does that mean it would take a digital input signal and somehow get it to the tank info? I purchased this as it was suggested for my resistive tank sender:
https://www.abelectronics.co.uk/p/50/expander-pi
It also has digital inputs/outputs. Could those be used to to read the signal from the tank sender then get that into the venus OS and into a Tank value?
Not sure if this is allowed or not, but....
If so, and it's just a dbus driver that needs written, I'll chip in $100usd to start a pool for anyone willing to take on this project. Anyone else can feel free to chip in if they are interested?