Bought one of these to try and it worked great. It connects to the PoE header and pins 1-6 of the GPIO header. However, it does open the 3V, 5V, and GND pins on top of the PoE daughter board. The board is snug and doesn't rise above the height of other components on the board, so almost any case should work with it. Good quality board. You might want to use it with an opaque case as the LED is quite bright.
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