It's been pretty difficult to get hold of Bluetooth LE adaptors that have decent aerials on them, so I have now started stocking some in the Espruino store:
I've been using one for a few weeks now and I'm noticing significantly higher range. They work great with Windows and Linux.
I've also got a batch of MDBT42Q Breakout boards made with a u.FL socket for an antenna, and these seem to really help with range as well. I'm seeing between 5-20 dBm increase in RSSI values when scanning for advertisements from the board.
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