> In this case what is a good SDR device that does TX? The hackRF is a popular one. If you want to do anything at range, note that you'll need an RF amplifier

> In this case what is a good SDR device that does TX? The hackRF is a popular one. If you want to do anything at range, note that you'll need an RF amplifier and an antenna. Also note that TX is heavily regulated, and you should get licenced before you start blasting. > Is there a very low bandwith equivalent of Internet via SDR? There's open source software to build your own LTE tower using an SDR. That's not really low bandwidth, though...