Staff anywhere that accepts tickets on smartcards are already meant to have devices that can read them in great detail, otherwise you're left looking at a piece of plastic.
Which is how I get through the barriers at Epsom.
SWR» smartcards should be able to be read at this Southern station but are rejected. The barrier staff know this so I show them my smartcard to get through. They have never read it electronically though. Oddly, the barriers at nearby Leatherhead, another Southern station will read my smartcard.
In early 2019 SWR confirmed to me that taking a break of journey using my season ticket at Epsom was valid and that "interoperability" would take place later that year meaning that I should then have no further problems.
Almost four years later, nothings happened and my smartcard still gets rejected.