hi manuka.Unsure on the RF part of your "data radio" pondering - what frequency,speed,range? One way (simplex) or both (half duplex) ?
That N&V article dates from 2009-2012 - surely now WiFi, BT or LoRa devices can assist ? Many modern micros of course come with at least one of these approaches.
Perhaps you mean wireless PICAXE programming ?
The reference to “AX8052F100 data radio” was just to show an example of a modern 8052-based uProc as a possible host for a modernized 8052-BASIC. The “data radio” portion of the chip might not necessarily be used.
A “data radio” could be used to send encrypted wireless data (telemetry). That would be a little off-topic for this site.
Sorry for any confusion.