October 21, 2009
15+ years experience in RF modules. Founder of Radiotronix, Fouding employee of Linx Technologies.
about 3 years ago
You are right. The 260-470MHz unlicensed band in the US is where these operate and the FCC specifically prohibits periodic data transmission. The one exception is if you transmit less than 300mSec every 10sec. But even then, you are limited to like 5dBm into a ¼ wave monopole. These are not legal in the US, period unless you have a license. If you are a hobbyist, you wont have a problem, but there is no way you will be able to put this into a product you intend to sell. 902-928, 2.4GHz, and 5.8GHz are the only options for unlicensed data in the US that I know of.
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