ESP8266 (ESP-07/12) Dev Board

This project is quite old now. And at least for me it is some kind of finished now. I do have have enough board for myself. At least if I do not give away to much boards boards in the future. And they are working fine. I did made some small changes after the last revision (rev2.2). I think the biggest issue was a wrong pin-mapping on the UART header. I decided now to publish the (maybe final) version including eagle files under CC BY-NC-SA. So you can now, if needed, make adjustments yourself. Please post some pictures if you do so.

Here are some renderings of the rev2.3 boards:

I will not order this revision for myself now. So if you use the files please consider that they are "untested". You can find the files in the bitbucket repository.

The rev2.2 boards did arrived from china (this time I used seed studio to produce the boards). They do look good. The mini/micro USB combination footprint looks also like it would work.

I did finalize rev2.2. Because I'm nearly out of boards. I think I will also order this board soon. Main improvements over rev2.0:
- header for external serial adapter
- power rails
- optional compatible to the node-mcu boards
- mini or micro USB

As soon as I ordered the boards you will also find the gerber files in the bitbucket. This time I will try some Chinese manufacturer outside of dirtypcbs. An the board will be green (like in the render).

As I did mentioned today I did made a mistake. The Centre pin of the power jack is negative. So the power Jack of boards of revision 2.1 or earlier (there is no completed newer revision yet) is not compatible with the power Jack used on the Arduino Uno. The documentation was also wrong on this. I did change the details section and added it to the errata of rev2 and rev2.1. A wrong power supply do not destroy the board because there are reverse polarity protection diodes.

I made some further improvements on the layout:

- header for external USB-serial converter
- "power-rails"
- micro or mini USB (as in rev 2.1)

rev2.2 is not ready yet. I am planing to add components to get optional compatibility with the nodeMCU boards. And maybe I will call it rev3 than - I am not sure.

So with this I fix (I hop all) issues of rev2.0 . I also added support for micro USB. So an micro OR mini USB connector can be used now. Not both at the same tme, because they are mounted at the same place.

You can fin the Gerber files in the Bitbucked repository. I will not order rev2.1 board fore myself yet. First I do have enough of rev2.0 and I will add other stuff before I do order a new revision.

[rendering of the Gerber files made with Viewplot 2.0]

Today I soldered the first revision board with battery management. it works and now I can use this for of grid operation. This board is also soldered with the switching regulator. This is much more efficient so less battery power get wasted.

On the last picture you can also see the stack up of the case quite good.

So here are picture of the first two revion 2 PCBs soldered and in the case: