Per the schematic linked to by the OP, I looked at it has a reset button. pushing that connects the Reset to ground any anything connected it. The diode forms an or and prevents the GPIO from being grounded with the reset button.
Per the schematic linked to by the OP, I looked at it has a reset button. pushing that connects the Reset to ground any anything connected it. The diode forms an or and prevents the GPIO from being grounded with the reset button.