Wiring Instructions for the RAIN BIRD WR2 Wireless Rain Sensor
DISCLAIMER
Rachio is NOT affiliated or authorized by RAIN BIRD; the RAIN BIRD brand rain sensors are manufactured by RAIN BIRD. This article is intended for instructional and compatibility purposes only.
Rachio does not recommend the use of 3rd party sensors unless required by local code. Remember to always enable Weather Intelligence features to skip watering schedules BEFORE it rains; rain sensors will only skip watering schedules AFTER it rains.
Wiring Chart
| Wire Color | Gen 1 Rachio | Gen 2 Rachio | Rachio 3 |
| White | R1 (left-most yellow terminal) | SC (Sensor Common - left of SP) | 24 VAC- (Sensor Common) |
| Black (a) | R1 (paired w/ above) | SC (paired with above) | 24 VAC- (paired with above in Sensor Common) |
| Red (b) | C (white terminal - far right) | SP (Sensor Power - far right) | 24 VAC+ (Sensor Power) |
| Green | R2 | S1 | S1 |
Wiring Diagrams
Rachio 3
Generation 2
Generation 1
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