Hi Puddin, The relay, power supply, software and usb cable was just $400. I also added some control relays and a 50 amp circuit breaker panel just for the growing area. The price is what kept me from doing this for two years. I keep thinking how many orchids I could buy for the money. This setup seems to be working very nicely and I have options to expand. By the way, I like your screen name.
John