HardLabs

XIAO

Josephrp·meshtonic·pcb/libs/XIAO Family/XIAO.kicad_pcb

XIAO PCB layout, top view — open source ESP32 board by Josephrp
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About the XIAO PCB

XIAO is an open source ESP32 PCB design by Josephrp, published on GitHub under the Custom license license. It is a 2-layer board measuring 203.1 × 125.1 mm, with 21 components from 21 distinct parts.

Its main chip is the XIAO-ESP32-C6-SMD, from the ESP32 family. Other key parts include the XIAO-SAMD21-SMD, XIAO-RP2040-SMD, XIAO-nRF52840-SMD, XIAO-SAMD21-DIP and XIAO-RP2040-DIP.

It belongs with the rf & radio, power & battery and sensors designs in this gallery.

From the project

Meshtonic H4M Companion — ESP32-S3 carrier for PortaPack H4M / Mayhem with multi-slot LoRa and standalone Meshtastic

Meshtonic H4M Companion v2 is a custom carrier board and firmware stack for a Seeed XIAO ESP32-S3 Plus that docks to a HackRF + PortaPack H4M (Mayhem) and can also run as a standalone Meshtastic mesh node.

Repository: github.com/Josephrp/meshtonic (formerly Meteor-On-Mesh)

The two ESP32 firmwares are mutually exclusive — flash one or the other depending on whether you are using the board docked or as a mesh node.

XIAO, from the project README
From the project README

Main components on the XIAO

XIAO-SAMD21-SMDXIAO-RP2040-SMDXIAO-nRF52840-SMDXIAO-SAMD21-DIPXIAO-RP2040-DIPXIAO-nRF52840-DIPXIAO-ESP32-C6-SMDXIAO-ESP32-C3-SMDXIAO-ESP32-S3-SMDXIAO-ESP32-C6-DIPXIAO-ESP32-S3-DIPXIAO-ESP32-C3-DIPXIAO-RP2350-SMDXIAO-R4-SMDXIAO-RP2350-DIPXIAO-R4-DIPXIAO-ESP32-C5-SMDXIAO-ESP32-S3-Plus-SMDXIAO-MG24-SMDXIAO-nRF54l15-SMDXIAO-nRF52840-Plus-SMD

XIAO bill of materials (BOM)

21 components, 21 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XIAO-SAMD21-SMD
U1
1
XIAO-RP2040-SMD
U2
1
XIAO-nRF52840-SMD
U3
1
XIAO-SAMD21-DIP
U4
1
XIAO-RP2040-DIP
U5
1
XIAO-nRF52840-DIP
U6
1
XIAO-ESP32-C6-SMD
U7
1
XIAO-ESP32-C3-SMD
U8
1
XIAO-ESP32-S3-SMD
U9
1
XIAO-ESP32-C6-DIP
U10
1
XIAO-ESP32-S3-DIP
U11
1
XIAO-ESP32-C3-DIP
U12
1
XIAO-RP2350-SMD
U13
1
XIAO-R4-SMD
U14
1
XIAO-RP2350-DIP
U16
1
XIAO-R4-DIP
U17
1
XIAO-ESP32-C5-SMD
U18
1
XIAO-ESP32-S3-Plus-SMD
U19
1
XIAO-MG24-SMD
U20
1
XIAO-nRF54l15-SMD
U21
Show 1 more
QtyPartRefs
1
XIAO-nRF52840-Plus-SMD
U22

XIAO design files

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

XIAO: common questions

What microcontroller does the XIAO use?

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

How big is the XIAO PCB?

The XIAO measures 203.1 × 125.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the XIAO?

21 components, from 21 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the XIAO design files?

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

Can I use the XIAO design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the XIAO 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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