Hello,
My car has two fuel level senders: Sender 1 moves the pointer from 0 to half, and Sender 2 moves it from half to full. I have disconnected Sender 1 and connected it to ZombieVerter 's Pot 1, and likewise, I’ve disconnected Sender 2 and connected it to ZombieVerter ’s Pot 2, as shown in this video: (you can start watching from 19:45). However, the pointer isn’t moving. Any suggestions?
Thank you in advance!
Re: ZombieVerter Fuel Guage Guidence
Posted: Sat Jan 25, 2025 12:44 pm
by tom91
HAhahahahahaha
ahahahaha
ahahahahahah
Really? You watch the video and decided yes this is the way I am going to wire it. EDIT(I am working with the zombie alot so I found this funny, this is not meant personal, I just keep being amazed by how inconsistent the information is that is available)
Digipots, which simulate resistance are currently not implemented fully.
Most automotive fuel senders work on resistance based feedback, this is why the Zombie has the Digipots.
The Pot and Pot2 are inputs. These are for throttle 0-5V signals.
Re: ZombieVerter Fuel Guage Guidence
Posted: Sat Jan 25, 2025 2:24 pm
by uhi22
There is some confusion. The wiki says pot1 and pot2 are outputs and the video says they are to drive fuel gauges. The throttle inputs are named throttle1 and throttle2 in the wiki. So far consistent. But on the other hand in the software there is pot and pot2 for the throttle, which causes confusion.
Re: ZombieVerter Fuel Guage Guidence
Posted: Sat Jan 25, 2025 2:35 pm
by tom91
Wait it is that bad? Thats very strange, again multiple people working on documentation and no one sticking to the names from the web interface.
Really? You watch the video and decided yes this is the way I am going to wire it. EDIT(I am working with the zombie alot so I found this funny, this is not meant personal, I just keep being amazed by how inconsistent the information is that is available)
Digipots, which simulate resistance are currently not implemented fully.
Most automotive fuel senders work on resistance based feedback, this is why the Zombie has the Digipots.
The Pot and Pot2 are inputs. These are for throttle 0-5V signals.
Pot 1 and pot 2 in web interface are related to throttle but in the hardware they are related to 2 the two potialmeter in the vcu as explained in the vidoe
Re: ZombieVerter Fuel Guage Guidence
Posted: Sat Jan 25, 2025 3:03 pm
by maiks
uhi22 wrote: ↑Sat Jan 25, 2025 2:24 pm
There is some confusion. The wiki says pot1 and pot2 are outputs and the video says they are to drive fuel gauges. The throttle inputs are named throttle1 and throttle2 in the wiki. So far consistent. But on the other hand in the software there is pot and pot2 for the throttle, which causes confusion.
Pot 1 and pot 2 are out puts that are used to control fuel guages. In the wiki they are referring to pot 1 and pot 2 under spot values and these are related to throttle
Re: ZombieVerter Fuel Guage Guidence
Posted: Sat Jan 25, 2025 3:09 pm
by tom91
What car do you have and do you have information on the fuel senders?
How are you calculating the SOC? Zombie does not do it too nicely at the moment.
Re: ZombieVerter Fuel Guage Guidence
Posted: Sat Jan 25, 2025 3:10 pm
by tom91
maiks wrote: ↑Sat Jan 25, 2025 3:03 pm
Pot 1 and pot 2 are out puts that are used to control fuel guages.
I do not know who made the pinout diagram it does not match the web interface thus code which is a major oversight. Feel free to update it.
Re: ZombieVerter Fuel Guage Guidence
Posted: Sat Jan 25, 2025 3:38 pm
by maiks
tom91 wrote: ↑Sat Jan 25, 2025 3:09 pm
What car do you have and do you have information on the fuel senders?
How are you calculating the SOC? Zombie does not do it too nicely at the moment.
I converted nissan xtrail t30 2007 diseal . Have been driving it for the last 30 days . Currently am using zombie for SOC but soon l will be using leafspy for SOC
Re: ZombieVerter Fuel Guage Guidence
Posted: Sat Jan 25, 2025 7:49 pm
by uhi22
Additional point of confusion: different versions of the zombiverter have/donthave the analog "Poti" outputs. In the wiki and video of the v1 they are present but not in the v3 on Damiens GitHub. So it depends on the used version whether the feature is supported.
Re: ZombieVerter Fuel Guage Guidence
Posted: Fri Jan 31, 2025 3:26 pm
by jetpax
@maiks,
Can you confirm that you actually need a variable resistor to drive the fuel gauge?
Many old school fuel gauges just rely on the current through the gauge so this could possibly be simulated with a PWM open drain signal at say 2kHz?
Would be very interested to know more about your application, as I'm just coding the PWM support in HeadlessZombie which is a fork of Zombie with 12 independently reconfigurable outputs which can do pull up or pull down PWM, so would like to see if this is a valid use case.
Re: ZombieVerter Fuel Guage Guidence
Posted: Fri Jan 31, 2025 3:50 pm
by medo
So as far as zombies are concerned, you really have to clean it up before it is developed further, otherwise it will end in chaos, I'm also confused by some things, especially the pwm area
Can you confirm that you actually need a variable resistor to drive the fuel gauge?
Many old school fuel gauges just rely on the current through the gauge so this could possibly be simulated with a PWM open drain signal at say 2kHz?
Would be very interested to know more about your application, as I'm just coding the PWM support in HeadlessZombie which is a fork of Zombie with 12 independently reconfigurable outputs which can do pull up or pull down PWM, so would like to see if this is a valid use case.
I initially thought the VCU could control the gauge, as explained in the video ( At 19:40, Damien mentions two potentiometers in the VCU, named Pot1 and Pot2, whose outputs can control the fuel gauges. However, I was unable to get it to work.
Re: ZombieVerter Fuel Guage Guidence
Posted: Fri Jan 31, 2025 6:19 pm
by tom91
maiks wrote: ↑Fri Jan 31, 2025 6:15 pm
I was unable to get it to work.
Have you tried changing the parameters DigiPot1Step and DigiPot2Step and measured the resistance of the pins to ground?
They currently do not do a whole lot more then that. (except for Jamies E9x map for his car to move SOC to Digipot steps in the E65 vehicle class)
Re: ZombieVerter Fuel Guage Guidence
Posted: Fri Jan 31, 2025 6:52 pm
by maiks
tom91 wrote: ↑Fri Jan 31, 2025 6:19 pm
Have you tried changing the parameters DigiPot1Step and DigiPot2Step and measured the resistance of the pins to ground?
They currently do not do a whole lot more then that. (except for Jamies E9x map for his car to move SOC to Digipot steps in the E65 vehicle class)