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RS485 through the tether

(Etienne Demers) #1


Has anyone passed RS485 throught the tether for sonar/altimeter?

Any interference with BR2 ethernet communications?

I have 300meters.

Alternatively, can I pass it through the ROV’s raspbery pi?


(Patrick José Pereira) #2

Hi @etienne,

Yes, you can use the RS485 without problems because of the differential pair.

Yes, it’s possible to use a python script or netcat to create a bridge between your sensor and the top side computer.

(Jacob) #3

There is a utility built into the Pi that allows you to select a serial interface and link it to a network interface. Look for the ‘Routing’ page in the web ui. This tool is not very efficient at the moment and isn’t great for high-bandwidth stuff. You can use netcat like this:

netcat -ul <port> > /dev/ttyUSB0 < /dev/ttyUSB0


netcat -u <ip> <port> > /dev/ttyUSB0 < /dev/ttyUSB0

(undersearobotics.com) #4

Yes, I also can confirm it works. Tested with an Imagenex 852 sonar and 200m tether.

(Etienne Demers) #5

Thanks everyone. I’ll try it through the tether.