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Update FLASHING.md

Added missing GPIO0 reference to the soldering section.
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Maurice Makaay 3 years ago
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@ -37,7 +37,7 @@ connect the wires of a device. Therefore, I find it most useful to take some
dupont wires with a female end to them, and cut off the other end. Strip the
wire on the other and, and then it can be used to solder it to the board.
Solder the wires to the RX, TX and GND debug pads that are shown in this
Solder the wires to the RX, TX, GND and GPIO0 debug pads that are shown in this
photo. It is not required to solder a wire to the 3.3V debug pad. This pad
is not directly connected to the 3.3V Vin of the ESP32 chip, making it a
less than optimal candidate for powering the board during flashing. Instead,


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