We had a lot of trouble getting them to work at lower frequencies. As soon as we switched to 915Mhz though, it all worked like a charm. Our guess was antenna

We had a lot of trouble getting them to work at lower frequencies. As soon as we switched to 915Mhz though, it all worked like a charm. Our guess was antenna problems. Once we had it set up and had interrupt driven code to handle sends and receives it all worked great.