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Meowpass 0.2

hb9ezs·meowpass·kicad/meowpass_0.2.kicad_pcb

Meowpass 0.2 PCB layout, top view — open source ESP32 board by hb9ezs
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About the Meowpass 0.2 PCB

Meowpass 0.2 is an open source ESP32 PCB design by hb9ezs, published on GitHub under the GPL-3.0 license. It is a 4-layer board measuring 194.5 × 40 mm, with 19 components from 15 distinct parts.

Its main chip is the XIAO-ESP32-C6, from the ESP32 family. Other key parts include the MP1584, L293DNE and L7809. By type, the board carries 9 capacitors, 4 ICs, 3 connectors, 1 inductor and 1 resistor.

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

From the project

Cat Flap with ESPHome

MeowPass is an open-source hardware and software replacement for the PetSafe PetPorte cat flap. By swapping the original PCB for a custom ESP32-C6 board running ESPHome, you gain full control via Home Assistant, easier cat management, and better reliability.

I wanted to add a very shy cat to my cat flap, so I decided to create an ESPHome version and build MeowPass.

Meowpass 0.2, from the project README
From the project README

Main components on the Meowpass 0.2

XIAO-ESP32-C6MP1584L293DNEL7809

Meowpass 0.2 bill of materials (BOM)

19 components, 15 distinct parts.

QtyPartRefs
1
XIAO-ESP32-C6
U1
1
MP1584
U2
1
L293DNE
U3
1
L7809
U4
1
Barrel_Jack
J1
1
Conn_01x06_Pin
J2
1
Conn_01x02_Pin
J3
1
WL-134
RFID1
1
47uH
L1
1
1000uF
C1
1
10uF
C2
4
0.1uF
C3, C4, C7, C8
1
1uF
C5
2
100uF
C6, C9
1
10k
R2

Meowpass 0.2 design files

The KiCad project lives in the hb9ezs/meowpass repository on GitHub; these links point at the commit this page was built from.

Meowpass 0.2: common questions

What microcontroller does the Meowpass 0.2 use?

The Meowpass 0.2 is built around the XIAO-ESP32-C6, from the ESP32 family.

How big is the Meowpass 0.2 PCB?

The Meowpass 0.2 measures 194.5 × 40 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Meowpass 0.2?

19 components, from 15 distinct parts. The full bill of materials is listed on this page.

Where can I download the Meowpass 0.2 design files?

From the hb9ezs/meowpass repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Meowpass 0.2 design in my own project?

Yes, under the terms of its GPL-3.0 license, which hb9ezs chose for the repository.

Can I test firmware for the Meowpass 0.2 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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