HardLabs

LoRa133

chl33·LoRa133·KiCAD/LoRa133/LoRa133.kicad_pcb

LoRa133 PCB layout, top view — open source ESP32 board by chl33

About the LoRa133 PCB

LoRa133 is an open source ESP32 PCB design by chl33, published on GitHub under the MIT license. It is a 4-layer board measuring 49.5 × 39.4 mm, with 20 components from 16 distinct parts.

Its main chip is the ESP32-WROOM-32, from the ESP32 family. Other key parts include the RFM95W-915S2, AMS1117-3.3 and SHTC3. By type, the board carries 4 ICs, 2 connectors, 1 fuse and 1 diode.

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

From the project

A base station for LoRa-based satellite sensor devices.

This project is a base station for LoRa-based satellite sensor devices such as Garden133. It includes KiCAD board design and C++ firmware. LoRa133 allows satellite sensor units to communicate using LoRa radio modules and automatically integrate with Home Assistant. I build the firmware using the Platformio build system.

This is a picture of the base station in its project box in OpenSCAD/Lora133/.

LoRa133, from the project README
From the project README

Main components on the LoRa133

RFM95W-915S2ESP32-WROOM-32AMS1117-3.3SHTC3

LoRa133 bill of materials (BOM)

20 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RFM95W-915S2
U1
1
ESP32-WROOM-32
U2
1
AMS1117-3.3
U3
1
SHTC3
U5
1
USB_B_Micro
J2
1
Edge2x6_Connector
J3
4
100nF
Ca1, Ca2, Ca3, Ca4
1
10uF
Cb1
1
10uF
Cb2
1
47uF
Cc1
1
0.5A
F1
1
Conn_01x04_Socket
JOLED1
1
470
RTX1
2
2.2k
Rf1, Rf2
1
10k
Ru1
1
SS14
D1

LoRa133 design files

The KiCad project lives in the chl33/LoRa133 repository on GitHub; these links point at the commit this page was built from.

LoRa133: common questions

What microcontroller does the LoRa133 use?

The LoRa133 is built around the ESP32-WROOM-32, from the ESP32 family.

How big is the LoRa133 PCB?

The LoRa133 measures 49.5 × 39.4 mm, has 4 copper layers and is 2.07 mm thick.

How many components are on the LoRa133?

20 components, from 16 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 LoRa133 design files?

From the chl33/LoRa133 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 LoRa133 design in my own project?

Yes, under the terms of its MIT license, which chl33 chose for the repository.

Can I test firmware for the LoRa133 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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