HardLabs

Gps lora

Majorwhiskey·gps-lora·hardware/gps-lora.kicad_pcb

This repository ships a schematic but no board layout.

About the Gps lora PCB

Gps lora is an open source ESP32 PCB design by Majorwhiskey, published on GitHub under the CERN-OHL-P-2.0 license. It is a 4-layer board, with 57 components from 35 distinct parts.

Its main chip is the ESP32-S3-WROOM-1-N8, from the ESP32 family. Other key parts include the USBLC6-2SC6, AP7361C-33E, SAM-M10Q and RFM95W-868S2. By type, the board carries 20 capacitors, 17 resistors, 5 ICs, 5 test points, 4 diodes and 3 switches.

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

From the project

USB-powered GPS logger with LoRa telemetry, built around the ESP32-S3.

USB-powered GPS logger with LoRa telemetry, built around the ESP32-S3.

Logs GPS fixes to a microSD card at 1 Hz, shows status on an OLED, and sends position over 866 MHz LoRa. WiFi provides NTP time, log download and OTA updates. Designed in KiCad as a 4-layer, fully machine-assembled board (Lion Circuits PCBA, Bangalore, single-sided).

- ESP32-S3-WROOM-1-N8 with native USB (no USB-UART bridge) - USB-C power and data, 5 V 1 A - u-blox SAM-M10Q GNSS module with integrated antenna, UART and PPS - microSD logging on a dedicated SPI bus - RFM95W (SX1276) 868 MHz-band LoRa radio on a second SPI…

Main components on the Gps lora

USBLC6-2SC6AP7361C-33EESP32-S3-WROOM-1-N8SAM-M10QRFM95W-868S2

Gps lora bill of materials (BOM)

57 components, 35 distinct parts.

QtyPartRefs
1
USBLC6-2SC6
U201
1
AP7361C-33E
U202
1
ESP32-S3-WROOM-1-N8
U301
1
SAM-M10Q
U401
1
RFM95W-868S2
U402
1
TYPE-C-31-M-12
J201
1
U.FL
J401
1
750mA
F201
1
RESET
SW301
1
BOOT
SW302
1
EJECT
SW303
4
TestPoint
TP201, TP202, TP203, TP204
1
SAFEBOOT
TP401
1
5V TVS
D201
1
Schottky
D202
1
Green
D301
1
BAT54
D401
1
4.7nF
C201
1
2200uF
C202
2
22uF
C203, C205
Show 15 more
QtyPartRefs
5
100nF
C204, C206, C303, C402, C406
2
100uF
C301, C404
3
10uF
C302, C401, C405
1
1uF
C304
4
DNP
C305, C306, C307, C308
1
0.2F supercap
C403
2
5.1k
R201, R202
1
1M
R203
1
0R
R204
3
10k
R205, R301, R302
1
15k
R206
2
1k
R303, R401
4
0R
R304, R305, R309, R310
1
499R
R306
2
100R
R307, R308

Gps lora design files

The KiCad project lives in the Majorwhiskey/gps-lora repository on GitHub; these links point at the commit this page was built from.

Gps lora: common questions

What microcontroller does the Gps lora use?

The Gps lora is built around the ESP32-S3-WROOM-1-N8, from the ESP32 family.

How big is the Gps lora PCB?

The Gps lora has 4 copper layers and is 1.6 mm thick.

How many components are on the Gps lora?

57 components, from 35 distinct parts. The full bill of materials is listed on this page.

Where can I download the Gps lora design files?

From the Majorwhiskey/gps-lora repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Gps lora design in my own project?

Yes, under the terms of its CERN-OHL-P-2.0 license, which Majorwhiskey chose for the repository.

Can I test firmware for the Gps lora 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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