Troubleshooting

If you should find that you have a short, then the following should help.

You'll need to download and/or enlarge this image for it to be useful. Green traces are on the solder side of the board and red traces on the component side. Where traces cross each other, they appear yellow, but they are on opposite sides of the board and so do not make contact except though the pads and vias. The large areas of red and green are connected to ground.

You will see each net is labelled on the traces and on the pads and vias where it passes through the board, these net names are the same ones found on the schematic. Names that you don't recognise are unlabelled on the schematic and so KiCAD made up net names for them. You should be able to figure out how these names correspond by comparing them with the schematic.

The net called VCC is 3.3v power, and VCCIO is also 3.3v but connected through the pins 2 and 3 of the power jumper. If you should have a short between 3.3v and GND, the first thing to do would be to pull this jumper and use a multimeter to discover whether the short is on the 3.3v net or the VCCIO net. This will considerably reduce the number of connections you need to inspect and/or resolder.

If all else fails, post images of your board under an issue (click on the ! in a circle at top right above) and someone will help you get going. And don't worry, completely failed builds are very rare.