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Topic: sensor data via Cat6 / RJ45 / breakout board (Read 2 times) previous topic - next topic

MichaelMeissner

I believe you still need to wire all grounds together.  So one of the wires in your cat6 needs to be the common ground.  Also, I believe you said that you were using unshielded cable.  You probably should get proper shielded cables as well.

Graynomad

Yes, unless you go for isolated interfaces (optocouplers etc) you need common grounds between all devices.

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Rob
Rob Gray aka the GRAYnomad www.robgray.com

inoukdemers

So let me see if I've got this. Taking three arbitrary wires on the Cat6, wire 1 supplies power to sensor from the Arduino, wire 2 transmits sensor data back to Arduino, and wire 3 acts as common ground. Do I have that right?

And yes, making sure the cable is shielded will help. Thanks for the feedback.

Graynomad

Quote
Do I have that right?

Yep, not that any of this helps with the current problem, have you connected the shield to ground to see if that helps?

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Rob
Rob Gray aka the GRAYnomad www.robgray.com

inoukdemers

Rob, if you mean the Cat6 shield, the answer is not yet - though since I'm using the RJ45 connectors I was hoping to avoid cutting the cables open, or is that what you mean?

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