Why do I even try…
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I need to stay in my lanes.
@Bobo1015, would you happen to have a picture of your working sensor’s wiring? I have the exact same setup and cannot make it work based on @Gene’s recommendations.
Out of town for a few days, sorry…
Can you post a picture of your setup? It is not just any white wire that belongs in the 24- terminal, but the one that is part of white, yellow and 2 red cable bundle.
@Gene, please see below. It’s a simple 4-zone setup. The sensor is not connected in the picture.
And this is how it was wired to the original Controller:
@ProjektR - at the risk of trampling @Gene 's great work here is what I’d try:
- Green - not connected
- Yellow - S1
- Red #1 24 VAC +
- Red #2 24 VAC - twisted together with the next wire
- White 24 VAC - again twisted together with the above Red wire.
I’m wondering if the White wire had a good connection as that is what I’m trying to accomplish by twisting them together.
Are any of the lights illuminated on the Hydro-Rain in this setup?
If the above didn’t work, then one could try putting the White wire in the C terminal by itself.
Thanks for the pictures! Helps tremendously.
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@Dlane is right on the money, I do not think that it will come down to connecting the white cable to commons (it belongs to 24 vac- as correctly indicated by step #5).
P.S. Here is an official diagram on how to hook up this kind of sensor:
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Thank you @DLane. I will give this a try tonight. I had the sensor originally wired as such:
White -> C
Yellow - S1
Red 1 -> 24V1
Red 2 -> 24V+
It picked up the sensor, but I kept getting constant notifications about the sensor being Active/Inactive all within the same minute (the log is not granular enough for me to see if there was any delay). Safe to assume something was wrong :). I will report back.
@ProjektR - I think if the White wire is moved to 24 V- like @Gene commented on or in the directions it will be good to go. If not, @Gene and I will wrestle it to the ground - so far we are undefeated! (But who’s keeping score besided @Gene and me 
!)
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I am 
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I continue to be amazed by the amazing troubleshooting and teamwork in this community! Thank you @DLane & @Gene for all of your help!
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@DLane, @Gene - thank you, seems to work beautifully!
Here is a picture of the final, working setup for Gen 3 and HRC-100
PS @franz, @laura.bauman - just a heads-up, I was given incorrect information by your support team when I called in about this a few days ago. The very professional and friendly gentleman advised me that this particular sensor was not compatible due to power supply differences. Not a complaint, just an opportunity to update the KB for future callers 
Thank you all, you’re awesome.
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Hey @ProjektR! Thank you so much for the heads up - is the email in your community account the same one used in the support ticket? Want to look into it to make sure it doesn’t happen again
-Lo 
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Hi everyone I am having a similar problem as above. I have an orbit wireless rain and freeze sensor model 57071. it is very similar to the Hydro Rain HRC-100. I have wired it exactly as pictured above. I have also attached my pictures.
The wireless controller powers on and when i activate the manual override the Rachio 3 sends a notification as if it is working shutting off the sprinklers. However the sprinklers do not shut off. Is this functioning correctly? do I even have the rain sensor wired correctly?. Any help would be greatly appreciated.
