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Emerson Jacobson edited this page Oct 10, 2021 · 9 revisions

Welcome to the ESPHub-Hardware Wiki!

I intend for this area to be more blog-style, where as I get physical boards made I can document what works with them and what I need to change.

Versioning

For this project I am attempting to create many different versions and easily make them distinguishable from one another. To do this, I am doing my own take on Semantic Versioning. Each Schematic change will result in a new Minor version and each PCB change will result in a new Patch version. For example, v0.98.0 and v0.98.1 will have the same actual wiring, but the implementation on the PCB will be different. v0.98 and v0.99 will have different schematics from each other with respective changes to the PCB implementation.

Because of this, software based on a certain Minor version should still work on different Patch versions, but software based on certain Minor versions may not be compatible with newer/older ones.

I am still not sure how/when I will implement Major versioning, but my intent is to eventually follow Semantic Versioning correctly.

v0.1

ESP v0.1

This was the very first board I have ever designed. I ordered 5 fully assembled units through JLCPCB, and out of the box none of them worked as expected.

  • 3 boards had 1 or more unsoldered pins on the BH1750 causing them not to be recognized.
  • 1 board received no USB power
  • 1 board received no USB data

Because none of the boards worked fully, I decided it was time to make the plunge into reflow soldering. I bought a reflow iron and managed to get all 5 boards fully working.

I looked at some breakout boards of the BH1750 and noticed that they made the pads very long, so in my newer designs I extended the solder pads and mask to hopefully promote better adhesion of the IC.

At the time of writing this, I have already incremented up to v0.4. I've added multiple headers, mounting holes in the board, added solder bridge pads, and rearranged some IC/traces. v0.4 is probably the next revision that I will produce as well, as many of the goals I had since v0.1 have been implemented.

v0.4

An order for v0.4 was placed on JLCPCB on 09/18/2021!

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