Hi @adrian.levy99,
LoRa is a low-powered radio which requires a line of sight between receiver and transmitter. However, if you plan to survey in more challenging conditions, I’d suggest using a couple of more powerful external radios to work in RTK.
Reach RS2 works with external radios, including UHF ones. You can use RS-232 or a USB port on RS2 to connect the radio. We’ve tested the UHF antenna with our Reach RS+, but it should work the same for Reach RS2.
I can hardly help you choose the right digital repeater since we haven’t tested them. So, I can’t guarantee that it’ll work fine with our devices.