I am working on a one off project for my home that will monitor items (like temperature and humidity) in several out buildings and have a status display in the house. There is buried power wiring in the way so I don't want to try putting in underground cable. Lightning is also a concern. I'm on a high spot and have had three tree's hit in 12 years.
An RF data link sounds like an answer.
Ready made RF modules like the MaxStream XC09-009WNC (900MHz) sound good. Probably enough range, plenty fast at 9600 bps, not too expensive and they look easy to use at first glance (no spec like make the data bits average out to 50% bits on).
The docs for the module says "Devices that embed XCite Radio Modems can inherit MaxStream?s FCC certification". Does that mean if I follow the manufacturer's rules on antennas and labeling I can use this in the US without doing any testing?
The prepackaged RF modems would certainly work and take care of the testing and certification worries. But the ones I've seen are all over $200 each, which is more than I'd like to spend when I will be getting 3 transceivers to start.
Thanks for the help.
Gerald Bonnstetter