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ROV control
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Edwin the inductor:
Hello
I working on a ROV (remote operating vehicle) I'm hav com to the contorol. I wonder can I use a Arduino with TX RX?
the cable is 50 m or should I use rs232? and if I use rs232 how should I do it (I'm bad on programming)?

grateful for help.
i_am_fubar:
Depends what you need to control. If just forward backward and you have a cable, run multiple telemetry lines?
johankj:
If you want to use serial communications:

Keep you baud-rate low, like 9600. That is a good trade-off between speed and transmission quality.

If you are using the serial-line of an arduino, that is a 3.3V or 5V line. Over 50m you may have an issue.

If you use a RS232-chip (like MAX2323), the chip usually bumps the voltage up to +/- 12V. You can easily communicate over 50m at low baud rates.

Have a look at the data sheet: http://www.ti.com/lit/ds/symlink/max3232.pdf

You would have to have something like an Arduino in both your top-side controller and your ROV.
Pack34:
RS485 may be your best bet. It'll handle longer cable runs than RS232
fcb:
As Pack34 says: RS485

Good for 4KM.  You can use it in half-duplex or simplex (one pair) or full duplex (two pairs).  Speeds for 500M can be quite quick, easily 115K2.
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