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Do the same for all of the requisite pins.
Pull-up/down resistors
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https://learn.sparkfun.com/tutorials/pull-up-resistors/all
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This board will be 61x30.5mm, with an area of 1860.5mm^2. According to Mounting Hole & Patern Specifications, this makes the board a “medium” size, meaning it will need M2 screw mounting holes. These have 2.40 mm hole diameter and 4.20mm annular ring diameter and will go in the corners of the board. Each hole will need 8 appropriately sized vias equally spaced out. We can add the holes themselves as a via as well.pad.
PCB Layers
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Following this 4-layer stackup with no impedance control from JLCPCB, our manufacturer.
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Buck Converter
The following are layout guidelines and examples from the TPS56424x buck IC datasheet.
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Flashing the ESP8285/S1281
https://github.com/crteensy/ELRS-8285-1280-5xPWM
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