Realdash communication with esp32

General
41

that’s good… and note that your own IDs were created in the XML

Woody data: LO beam

you can find them in the “ECU specific” section.

42

Nearly caught me out there.
Added target 156 for low beam. Made sure the offset is 2
Load XML file.
Trigger the correct input… Nothing on RD
Went into the RD Edit and found no Low Beam on the skin
Checked and found 164 for parking brake.
Loaded this and it bring up the parking brake light.
Happiness

<?xml version="1.0" encoding="utf-8"?> 
<frame id="0x1001">
  <value targetId="161" offset="0" length="1" conversion="V" rangeMin="0" rangeMax="1"></value>
  <value targetId="160" offset="1" length="1" conversion="V" rangeMin="0" rangeMax="1"></value>
  <value targetId="164" offset="2" length="1" conversion="V" rangeMin="0" rangeMax="1"></value>
  <value targetId="157" offset="3" length="1" conversion="V" rangeMin="0" rangeMax="1"></value>
</frame>
44

Ok I now read that there is a limitation on how small the input voltage could be.
So my new circuit is as follows:
Supply 5 Volt.
This 5V connects to a 200 Ohm resistor.
This 200 Ohm resistor connects to the fuel sender (33 - 240 Ohm)
Where the 200 ohm and the sender unit connects I connect that to Pin35 of the ESP32
Now the voltages are 708 mVolt on empty and 2.7 Volt on full
Is this correct ?

45

I gave you a link to an online service for modeling electrical circuits. There you will see the voltage, current, and power on the resistor.

46

That is what I used.
Want to check if I did it correctly only
And if the connections is correct