2 layers103 × 30.5 mm
2 layers58.9 × 19.3 mm
Lora digirepeater micro
sh123/micro_loraprs26Arduino Micro LoRA/FSK USB KISS modem (for Linux AX.25, APRSDroid, Codec2Talkie) or standalone APRS AX.25 micro digirepeater
- Size
- 58.9 × 19.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 9
- Nets
- 11
- Pads
- 57
- Tracks, vias
- 90, 28
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 12 Mar 2023
- Updated
- 14 Apr 2025
Overview
Lora digirepeater micro is an open-source printed circuit board by sh123, from the sh123/micro_loraprs repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board of 58.9 × 19.3 mm with 9 parts on 11 nets, routed with 90 tracks and 28 vias.
Its parts include 3 capacitors, 2 resistors, 2 ICs and 2 connectors. It belongs with the radio and wireless and home automation and IoT boards and the AVR (ATmega, ATtiny) boards of this library.
README
README.mdArduino Micro LoRA/FSK KISS modem and APRS AX.25 digirepeater
Introduction
This project is Arduino Micro LoRA/FSK USB KISS modem and standalone APRS AX.25 digirepeater with RA-01 LoRA module.
Probably, could be easily used with other Arduino boards.
Currently, default radio module is SX1278, such as RA-01/RA-02.
Can be build in two modes:
- As USB KISS LoRA/FSK modem, to be used with Linux AX.25 tools over USB or with APRSDroid or Codec2Talkie applications over USB OTG
- As a standalone LoRA/FSK AX.25 digirepeater optimized for low power consumption
Configure
Update include/config.h with your LoRA modulation settings and module pinouts.
Build
Use platformio to build required configuration for repeater or modem.
Photos
Parts
9| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C3 |
| 2 | 20k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 1 | 47uF | Capacitor_Tantalum_SMD:CP_EIA-7132-28_AVX-C_Pad2.72x3.50mm_HandSolder | C2 |
| 1 | Ai-Thinker-Ra-01 | RF_Module:Ai-Thinker-Ra-01-LoRa | U2 |
| 1 | Conn_01x02_Male | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J1 |
| 1 | Conn_Coaxial | Connector_Coaxial:SMA_Samtec_SMA-J-P-X-ST-EM1_EdgeMount | J2 |
| 1 | ProMicro | micro:ProMicro-NoSilk | U1 |
Questions
How big is the Lora digirepeater micro PCB?
It measures 58.9 × 19.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Lora digirepeater micro use?
9 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Lora digirepeater micro KiCad files?
From the sh123/micro_loraprs repository on GitHub, at the commit this page was made from: the board is extras/schematics/lora_digirepeater_micro.kicad_pcb and its schematic extras/schematics/lora_digirepeater_micro.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lora digirepeater micro design in my own project?
Its repository publishes it under the GPL-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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