HardLabs

Hap

AlanCarvalhoEE·hap·hardware/on_off_module_x1/on_off_module_x1.kicad_pcb

Hap PCB layout, top view — open source ESP8266 board by AlanCarvalhoEE

About the Hap PCB

Hap is an open source ESP8266 PCB design by AlanCarvalhoEE, published on GitHub. It is a 2-layer board measuring 46 × 77 mm, with 33 components from 27 distinct parts.

Its main chip is the ESP-12E, from the ESP8266 family. Other key parts include the AMS1117-3.3, PC817 and H11AA1. By type, the board carries 12 resistors, 7 capacitors, 4 ICs, 3 connectors, 2 diodes and 1 transistor.

It belongs with the iot & wireless and sensors designs in this gallery.

From the project

Home Automation Platform with custom hardware and firmware (ESP8266), a Raspberry Pi–based server, and an Android client. Features modular IoT devices, TCP/IP and MQTT messaging, and a scalable system architecture.

A modular, self-hosted home automation platform focused on reliability, local control, and secure remote access.

The system is designed around a Raspberry Pi server that centralizes application logic and device state, ESP8266-based IoT modules for field control, and a mobile application as the primary user interface. Communication between components is event-driven and optimized for embedded and low-latency environments.

Hap, from the project README
From the project README

Main components on the Hap

AMS1117-3.3ESP-12EPC817H11AA1

Hap bill of materials (BOM)

33 components, 27 distinct parts.

QtyPartRefs
1
AMS1117-3.3
U1
1
ESP-12E
U2
1
PC817
U3
1
H11AA1
U4
1
2N7002H
Q1
1
CONN_TERMINAL-BLOCK_5P_P5.08
J1
1
Conn_01x06_Socket
J2
1
Conn_01x03_Socket
J3
1
0,25A
F1
1
12V 5A
K1
1
HLK-PM12
PS1
1
LED
D1
1
S1A
D2
1
600R
L1
1
0.1uF
C1
1
100uF
C2
2
10uF
C3, C4
1
0.1uF
C5
1
47nF
C6
1
100nF
C7
Show 7 more
QtyPartRefs
5
10k
R1, R2, R3, R6, R12
1
2k2
R4
1
390R
R5
1
33k
R7
1
10k
R8
1
470k
R9
2
33k
R10, R11

Hap design files

The KiCad project lives in the AlanCarvalhoEE/hap repository on GitHub; these links point at the commit this page was built from.

Hap: common questions

What microcontroller does the Hap use?

The Hap is built around the ESP-12E, from the ESP8266 family.

How big is the Hap PCB?

The Hap measures 46 × 77 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Hap?

33 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the Hap design files?

From the AlanCarvalhoEE/hap repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Hap design in my own project?

The repository has no license, so all rights stay with AlanCarvalhoEE. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Hap without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.

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