4 layers69.9 × 44.5 mm
DoughLee2
chl33/Dough133
A temperature-controlled container for proofing and fermenting soughdough
62 parts3MIT
4 layers49.5 × 39.4 mm
LoRa133
chl33/LoRa1331A base station for LoRa-based satellite sensor devices.
- Size
- 49.5 × 39.4 mm
- Copper layers
- 4
- Thickness
- 2.07 mm
- Parts
- 22
- Nets
- 50
- Pads
- 145
- Tracks, vias
- 217, 62
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Jun 2025
- Updated
- 20 Jul 2026
Overview
LoRa133 is an open-source printed circuit board by chl33, from the chl33/LoRa133 repository on GitHub, published under the MIT licence. It is a 4-layer board of 49.5 × 39.4 mm with 22 parts on 50 nets, routed with 217 tracks and 62 vias.
It is built around the ESP32-WROOM-32, SHTC3 and AMS1117-3.3, with the RFM95W-915S2 and SS14 among its other parts. Its parts include 4 ICs, 2 connectors, 1 diode and 1 fuse. It belongs with the radio and wireless and home automation and IoT boards and the ESP32 boards of this library.
Main components
5
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
SHTC3
Digital I²C temperature / humidity sensor. Input voltage: 1.62 - 3.6 V Typical accuracy: ±2 %RH and ±0.2 °C Datasheet: https://www.sensirion.com/shtc3/SensirionUncategorised
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
RFM95W-915S2
LCC-16_16X16mmLCC-16_16X16mm New Arrivals ROHSHopeRF Micro-electronicsUncategorised
SS14
SMA(DO-214AC)-55℃~+150℃ 1A 25A 300uA@40V 40V 550mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
README
README.mdLoRa133
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/.
This is the PCBA documented in KiCAD/LoRa133/.
Here is what the web interface (written in Svelte) looks like:
Please see the Introducing Garden133 blog post for more information.
This device uses these libraries:
- og3. A basic C++ library for esp development in the Arduino environment.
- og3x-lora. LoRa module support for the og3 library.
- og3x-satellite. A library that helps build a satellite architecture of a base station and satellite sensors.
What's New in v0.7.0
- Satellite Device Memory: The bridge now persists its satellite network knowledge across reboots. Restarts no longer result in a blank device list.
- Enhanced Visibility: Real-time RSSI, packet counts, and human-readable "Last Seen" timers added to the web dashboard.
- Mobile Optimized: Fully responsive web interface that fits perfectly on smartphone screens.
- og3 v0.6.1 Core: Modernized backend leveraging the latest declarative dependency and file storage improvements.
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100nF | Capacitor_SMD:C_0603_1608Metric | Ca1, Ca2, Ca3, Ca4 |
| 2 | 2.2k | Resistor_SMD:R_0603_1608Metric | Rf1, Rf2 |
| 1 | 0.5A | Diode_SMD:D_0805_2012Metric | F1 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | Ru1 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | Cb2 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | Cb1 |
| 1 | 470 | Resistor_SMD:R_0603_1608Metric | RTX1 |
| 1 | 47uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | Cc1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | Conn_01x04_Socket | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | JOLED1 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U2 |
| 1 | Edge2x6_Connector | chl33_library:EdgeConnector_2x3 | J3 |
| 1 | RFM95W-915S2 | RF_Module:HOPERF_RFM9XW_SMD | U1 |
| 1 | SHTC3 | Sensor_Humidity:Sensirion_DFN-4-1EP_2x2mm_P1mm_EP0.7x1.6mm | U5 |
| 1 | SS14 | Diode_SMD:D_2010_5025Metric | D1 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Amphenol_10118194_Horizontal | J2 |
The 20 most common of 22 parts.
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Questions
How big is the LoRa133 PCB?
It measures 49.5 × 39.4 mm and has 4 copper layers, 2.07 mm thick.
What parts does the LoRa133 use?
22 parts, built around the ESP32-WROOM-32, SHTC3, AMS1117-3.3 and RFM95W-915S2. 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 LoRa133 KiCad files?
From the chl33/LoRa133 repository on GitHub, at the commit this page was made from: the board is KiCAD/LoRa133/LoRa133.kicad_pcb and its schematic KiCAD/LoRa133/LoRa133.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LoRa133 design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).