Set legal speed 20 km/h using reverse pin input

i need to use the rx pin from com (used to default for reverse) for set limit the speed to 20 km/h and wen release return to normal profile.

tha is for e-scooter that not need reverse command.

i think if possible, to add on feature vesc this setting,

field whit set legal speed example (20)

field with set change reverse wit legal speed command.

i'm using ubox single 100v 100A