RS 485 serial communication

Using Arduino Programming Questions
1

Hi all.

I'm currently working on an underwater ROV and i have some programming questions. My current plan is to have 2 arduino unos for control. one on the surface and one in the ROV. i have some RS485. i will be using 4 joysticks for the directional control and each joystick has two potentiometers. this means that i will have a total of 8 potentiometers. i will need to send the signals over the RS485 cables.
I want to the controls to be fluent so that i can have steady acceleration.

My question will a baud rate of 9600 be enough for a steady acceleration and will i be able to transmit all the signals at once.

thanks sam

2

That's pretty much bottom basement speed. Is there any reason to limit it to that? Is there some component that can't go faster? If not then go as fast as you can. 115200 seems a good number I've used a lot. I know Arduino can go faster.

3

thanks for the fast reply.
because of the distance i'm using MAX RS485 chips to convert the serial onto two wires but i'm not sure that the chips will be able to keep up

thanks sam

4

aussamc:
thanks for the fast reply.
because of the distance i'm using MAX RS485 chips to convert the serial onto two wires but i'm not sure that the chips will be able to keep up

thanks sam

Have you looked at the specs for the chips? What do they say they're capable of.

5

Start by looking at parts here
https://www.digikey.com/products/en/integrated-circuits-ics/interface-drivers-receivers-transceivers/710?FV=1140050%2C1f140000%2Cffe002c6%2C9080020&mnonly=0&ColumnSort=1000011&page=1&stock=1&pbfree=0&rohs=0&cad=0&datasheet=0&nstock=0&photo=0&nonrohs=0&newproducts=0&k=rs485&quantity=&ptm=0&fid=0&pageSize=25&pkeyword=rs485