In most cars the fuel level is measured by a floater connected to a potentiometer and it's quite likely that the panel is reading an analogue voltage signal coming from the fuel sender unit.
What would be the cheapest way to read that voltage, then send it via WiFi to a listening unit. (the listening unit is already finished and awaiting implementation)
I'm looking for a permanent solution, something that can be placed in the vehicle with an autonomous battery (or connected to the car battery).
Please keep in mind that i'm not an Electrical Engineer, i'm a software engineer with a hobby in this area, but i've never done anything this complex before, so if you can point out ideas or components used that be great.
^^That is the fuel tank pump.