GitHub repo: https://github.com/ndoo/ikoka-nano-meshtastic-device

A Meshtastic device based on the Seeed Studio XIAO nRF52840 and EBYTE E22-XXXMXXS series LoRa modules. Pinout matches the Meshtastic xiao_ble variant.

The focus is on small size without an onboard display or buttons, meaning it must be used with Meshtastic client software, or as a remote repeater managed with remote node administration.

• Qwiic connector for I²C sensors

• SnapMagic E22-900M30S footprint & symbol
• SparkFun KiCad Libraries
• SeeedStudio OPL KiCad Library (forked to add missing XIAO nRF5240 symbol)

• The files were created in KiCad 8
• Clone this git repository recursively, i.e. with –recursive

• Follow the instructions to generate Gerbers at your PCB house, e.g. JLCPCB PCB Files Preparation
• Default 1.6mm 2-layer PCB settings should work well, this PCB passes DRC based on JLCPCB specifications (other than the silkscreen of XIAO module being clipped by the PCB edge)
• PCBA: I used JLC PCB Plug-in for KiCad to generate a BOM and CPL file compatible with JLCPCB PCBA

• LCSC
  • 1* EBYTE E22-900M30S
  • 1* JST SM04B-SRSS-TB(LF)(SN)
  • 1* Murata GRM31CR60J107ME39L
• Seeed Studio
  • 1* Seeed Studio XIAO nRF52840

1. Solder U2 E22 module
2. Solder U1 XIAO nRF52840
3. Solder C1
4. Solder Qwiic socket

Follow the instructions at meshtastic/firmware/variants/xiao_ble/.