Imported from GitHub: wjblack/basicesp · commit 62117f1 · license WTFPL

Description

Simple breakout board for the ESP-12F

README

BasicESP Hardware Revision 2.0

Introduction

This PCB design is the second in the basicesp line. The basicesp is designed to use the ESP-12 module and has:

• 2mm pads for the ESP wifi module (the board has overhang/clearance space for the module so that the antenna gets no interference from the board)
• Built-in 5V->3.3V regulator
• A programming switch
• A serial header
• All the various resistors needed for mode setting

A GPIO header on the left side has the following pinout (from the top):

1. ADC
2. GPIO5 (NodeMCU IO Index 1)
3. GPIO4 (Index 2)
4. GPIO16 (Index 0)
5. GPIO14 (Index 5)
6. GPIO12 (Index 6)
7. GPIO13 (Index 7)
8. +5V
9. GND
10. +3.3V

Notably an I2C display (like the Sainsmart LCD2004 controller) can be wired straight to pins 3-6 without any gymnastics. A typical PIR motion sensor module can be wired to pins 4-6 with minimal gymnastics (swapping the OUT and either VCC or GND connection to match ends).

Production and Files

This board was sent to manufacture on 6 Feb 2017.

The design was done using kicad for both schematic, netlist, and PCB layout. The kicad source files are all in kicad/.

When assembled, the board should look like this:

And here is a PDF of the schematic.

Shortcomings

Revision A had two disconnected nodes (notably the +5V through the power header and a filled region break for ground). That's been fixed in rev 2.0b.