120Ω needed on Nasa? - physical layer

[johnnytolengo]

Hi, I was looking the info about the Nasa protocol and there not information about the physical layer.
Nasa seems to uses a kind of multimaster communication, where all devices can write to the bus independently.

• Is 120Ω resistor needed on our device (M5STACK ATOM RS-485)?
• Do all the Samsung devices have a 120Ω resistor by default?
• Bias resistors needed (pull-up & pull-down A B)?

[lanwin]

@johnnytolengo sorry, I have no Idea. I am not a hardware guy. But I did not added any resistor to make it work and non of the other users does.