In Romania, there is a well-known brand of intercoms called Electra. The CU can detect its tag as EM410X, but the intercom does not respond to its emulation. In other words, the intercom does not react at all to the EM410X tag, and I've attempted using various tags from the same brand without success.

Another discussion involves individuals who have managed to make Electra work with Flipper.
https://forum.flipper.net/t/electra-intercom/6368

Can this be applied to ChameleonUltra?