Packet Serial Raw Command Structure

General discussion of using Roboclaw motor controllers
RangerDave
Posts: 6
Joined: Wed Sep 20, 2017 11:25 pm
Re: Packet Serial Raw Command Structure

Post by RangerDave »

This is one processor i tried.

https://www.crestron.com/Products/Contr ... ystems/MC3

i tried specifically there "Supports 1-way device control via infrared up to 1.2 MHz or serial TTL/RS-232 (0-5 Volts) up to 115.2k baud; supports CNXRMIRD IR Receiver [3]" in the ttl/rs232 mode, exactly what this thing specified, in every available baudrate i was able to set on the roboclaw and got the exact same behavior as everything else i had tried with sending single byte commands. I've basically run out of options on what to try here as i believe i am fullfilling all the requirements set out by the roboclaw to be controlled.
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Basicmicro Support
Posts: 1594
Joined: Thu Feb 26, 2015 9:45 pm
Re: Packet Serial Raw Command Structure

Post by Basicmicro Support »

This device is basically a PC. The two comports on it according to the datasheet are RS-232 comports. So I suspect they are regular RS-232 signaling(eg +v/-v usualy +-12v). This will not work with the Roboclaw. The roboclaw needs 0 to 5v signaling on the comport. You must use a RS-232 to TTL level converter to use this with Roboclaw.

Also, you may have damaged the Roboclaw S1 pin if you connected one of the comports from this to it.

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