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VESC MAXIM+120 Reverse Button

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michael.jahrer
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VESC MAXIM+120 Reverse Button

Hi,

I bought a Maxim+120 for my Zero 75-7 motor.
I managed to make it running with the sin/cos encoder.
My plan is to put it in a gokart.

So I need a reverse switch.
I have 1xADC (throttle), 1xADC (brake).  <-- this works

When I select Control Type = "Current Reverse ADC2 Brake Button" everything works except reverse.
I used reverse Pin37 (Reverse Input) according to datasheet.
When I connect this pin to GND nothing happens.
The motor spins in the same direction.
When I measure voltage on Pin37 I read 0V (should this not have a pullup to +3.3V or so ??)

When I change "APP to Use" = "ADC"  (and not "ADC and UART) the motor spins wild in both directions when apply throttle.
This is maybe an indicator that the reverse button is mapped to RX (which is one of the sin/cos pins).

Does anybody know how I can make a "REVERSE BUTTON SWITCH" ???
Or maybe a tip what can I try else ?!

Best,
Michael Jahrer

here are some pics of the setup + settings

Screenshot from 2026-04-22 21-01-08.png

Screenshot from 2026-04-22 21-01-19.png20260422_211255.jpg

20260422_211246.jpg

20260422_211300.jpg