Nordic says the nRD52840 supports 5.4, Seeed/Xiao says 5.0 for their nRF52840 board. I don’t need the features of 5.4 but AoA and AoD (5.1) would be a neat trick… Is it possible to use features from versions higher than the stated support of 5.0?
Hi there,
No, AoA and AoD are only supported by Nrf54L15, None of the Arduino supports that out of the Box. 
You can use the NRF_SDK to gain that functionality However no examples do exist outside of DK examples. 
HTH
GL 
PJ 
You cannot use AoA/AoD on the Seeed XIAO nRF52840, even though the nRF52840 chip itself supports it, because:
The antenna design doesn’t support direction finding.
The firmware only supports BLE 5.0 unless you rebuild it with the nRF Connect SDK.
You’d need a special antenna array and switching hardware for full AoA/AoD use.
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Appreciate the responses!