ESP-Micro Is A Tiny Development Board

The ESP-8266 packs a lot of networking power into a small package. Some would say too small, which is why they often come on a slightly larger carrier PCB. The PCB is usually little more than a breakout with an optional 3.3V regulator. [Frazer Barnes] went one step further: he put an equally tiny USB to serial bridge, an oscillator, and some power management on an ESP-8266 breakout board.

You can program the ESP-8266 via the serial port, so having a built-in USB port is handy. Of course, you might not need it in the final product, but with the board being 25x30mm, you can probably cram it into most projects. [Frazer] posted a bit about the project on, and has a GitHub project, although right now the upload of the design files is pending.

There’s no shortage of ESP-8266 projects. We saw a small Zigbee to ESP8266 board last year, and also the antidote for a tiny carrier board that includes an LCD, switches, and more. We also have tons of breakouts on here’s one with all the bells and whistles, and a similar, stripped-down version. All open-everything, and ready to go.

26 thoughts on “ESP-Micro Is A Tiny Development Board

    1. You’re not blind. This board design is absolutely ridiculous. Is there any word if this thing even works?

      Maybe it’s secretly a 4-layer stack-up with 0.1mm prepreg between the outside and inner layers, such that those tiny 6-mil traces work out to 50 ohm. You never know :-)

        1. Tested a breadboard-ed version of an ESP8266, deadbug style and was almost working. Keep in mind that some of the commercially available modules(especially ESP-03) route the antenna trace through vias.

          I agree with you that the number of solder bridges is pretty damn high, but the project is an attempt to create something useful. In time, it will be refined either by feedback or fails. Seems that the antenna trace has some kind of matching network.

  1. Another ESP board? There are already dozens of different designs on the market, and most of them are better designed. And whoever designed and built it clearly has no idea, how such things are done. And those shorts? I’d rather not show my design, if it looked like this…

      1. If I ever needed ESP2866 board, I’d buy one. Here buying Chinese modules is cheaper than ordering custom boards, buying parts and soldering everything together. And I don’t need to waste time on RF design (which must be done properly), which I could put to better use, like writing better firmware for device…

      2. I’m sure you’ve never criticised something that you yourself hadn’t already done better right? You’ve never complained about a car breaking down, a phone not living up to your taste or a multi million dollar movie that you just didn’t find that funny. Right?

  2. Easy folks. It sounds like some of you are implying that the editor just picked this one from the io page randomly without wetting it even a tiny bit. Besides, who cares if it is a good design or if it works? The guy who designed it put some effort into this and he even has a board made. That’s what matters.

      1. More importantly everyone has to start somewhere. Quite a few of my first board designs never worked, but I learned a lot from my mistakes. Try offering suggestions instead of criticism.

        Flux is your friend when trying to fix solder bridges:

        Sparkfun has some good tutorials on soldering smd parts

        And RF is something you have to read a lot about to start to understand.

  3. Tough crowd here. Jeez.

    They have valid points though. But good job on getting something like this together. Especially for RF, it will be interesting to see how much of a performance improvement you can make.

    Some tips: study the reference design if there is one.
    A big thing that affect RF performance: impedance of the strip line, and the keepout (or lack thereof) around the ceramic antenna.
    You can find calculator for this. Read the datasheet for the ceramic antenna as well…

  4. Hi everyone

    I’m Peter and I work on this project with Frazer.

    Thanks for all your feedback, it has been noted. :)

    The board does include pads for a SMA connector, we just didn’t have it in stock to fit it yet. The same is for inductors to control signal impedance, they’re on the rear of the board and not placed currently.

    I’ll be happy to answer any other questions you have :)

  5. Just a thought… based on the designs on the two other boards I see at (the site is on the board featured) could the hacker not have asked for advice from the engineer(s) who laid out those boards? I know the wrong kinds of engineers at my work, but they are usually egotistical enough to answer most questions and, at the very least, tell you what not to do.

    Rather than a blurb about the board (I’ll avoid the issues I see with it), I’d like to see the work and thought process that went into it.

  6. On a side note, given this article is a bit lame, anybody heard anything more about the ESP32? I’d like to get hold of one, but I might need to wait for them to port the Arduino platform again!

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