Closed question

Data I/O possibilities (closed) - Thanks

A Standard SiK radio set is the most common. Google “ardupilot sik radio”. Holybro and Mro make popular units.

You may find this page helpful:
Telemetry (landing page) — Copter documentation (

As Dave says, SiK radios are the most common and likely cheapest option (at least for any decent range).

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No need to delete your posts and remove context from the title. Others may find the information useful.