4 layers22 × 22.2 mm
Tasgdo
nrwiersma/tasgdo
TasGDO is an ESP32 Garage Door Controller, intended to be used with Tasmota for a local Matter controller.
41 partsMIT
4 layers23.2 × 43 mm
Sentinel
nrwiersma/sentinelPresence detection
- Size
- 23.2 × 43 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 69
- Nets
- 58
- Pads
- 236
- Tracks, vias
- 348, 161
- Pours
- 149
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 15 Aug 2026
- Updated
- 18 Oct 2026
Overview
Sentinel is an open-source printed circuit board by nrwiersma, from the nrwiersma/sentinel repository on GitHub, published under the MIT licence. It is a 4-layer board of 23.2 × 43 mm with 69 parts on 58 nets, routed with 348 tracks and 161 vias.
It is built around the ESP32-C3FH4, BH1750FVI-TR and SHTC3-TR-10KS, with the TPS563201DDCR, 2005FV-2X4P and WS2812C-2020-V1 among its other parts. Its parts include 26 capacitors, 17 resistors, 8 ICs, 3 connectors and 3 switches. It belongs with the ESP32 and RISC-V boards of this library.
Main components
12
ESP32-C3FH4
QFN-32-EP(5x5)160MHz 32 Bit 3V~3.6V 400KB RISC-V Watchdog reset、Software reset、Built-in general-purpose timer、Programmable watchdog、Built-in temperature sensor、True random number generator (TRNG)、Storage encryption、Infrared remote control QFN-32-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHSEspressif SystemsMicrocontrollers (MCU/MPU/SOC)
BH1750FVI-TR
WSOF-6-40℃~+85℃ 2.4V~3.6V 65.535klx I2C Light Intensity WSOF-6 Ambient Light Sensors ROHSROHM SemiconductorAmbient Light Sensors
SHTC3-TR-10KS
DFN-4-EP(2x2)DFN-4_2X2 New Arrivals ROHSSensirionTemperature And Humidity Sensor
TPS563201DDCR
SOT-23-THIN-6-40℃~+125℃@(TJ) 1 3A 4.5V~17V 580kHz 768mV~7V Adjustable Buck Buck Built-in Yes SOT-23-THIN-6 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
2005FV-2X4P
插件,P=2mm-40℃~+105℃ 2 2A 2mm 2mm 2x4P 4.3mm 8P Square Hole Through Hole Top 插件,P=2mm Female Headers ROHSHanElectricityFemale Headers
WS2812C-2020-V1
SMD,2x2mm0.5mA 0.84mm 2.2mm 2kHz 2mm 3.7V~5.3V 800Kbit/s Built-in power-on reset circuit、Built-in power-on reset circuit G:520nm、R:624nm、B:467nm R:130mcd、G:320mcd、B:60mcd SMD,2x2mm RGB LEDs(Built-in IC) ROHSWorldsemiRGB LEDs(Built-In IC)
RC0402FR-0710KL
UncategorisedUnknown maker
CL21A226KPCLRNC
080510V 22uF X5R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMTCL21A106KAYNNNE
080510uF 25V X5R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
TMS322512ALM-100MTAA
12101.2A 1.6A 10uH 360mΩ Thin-Film Inductor ±20% 1210 Inductors (SMD) ROHSTDKInductors (SMD)
1N5819WS
SOD-3231 Independent 1A 25A 40V 500uA@40V 600mV@1A SOD-323 Schottky Diodes ROHSGuangdong HottechSchottky Diodes
RK73H1ETTP1001F
0402-55℃~+155℃ 100mW 1kΩ 75V Thick Film Resistor ±1% ±100ppm/℃ 0402 Chip Resistor - Surface Mount ROHSKOA Speer ElectronicsChip Resistor - Surface Mount
README
README.md
Sentinal is a presence detection device that uses a mmWave to detect occupancy. It can be used to control lights, fans,
or other devices based on occupancy. It also include a light sensor to detect ambient light levels as well as a temperature
and humidity sensor.
Key Features
- Presence detection using LD2450 mmWave radar
- Ambient light detection using BH1750 light sensor
- Temperature and humidity detection using SHTC3 sensor
- RGB LED for status indication
- Native alarm integration
Firmware
ESPHome firmware is available for the device. See the releases for the latest version. The firmware can be flashed using the ESPHome Web installer.
Hardware
The hardware is based on the ESP32-C3 module and the LD2450 mmWave radar module. The device is designed to be low power and can be powered using a 12v power supply, which is fairly common in home alarm systems.
See the Schematic for more details on the hardware design.
BOM
See the Interactive BOM (provided by InteractiveHtmlBom) .
Update LD2450 Firmware
- Download the HLKRadarTool on your phone
- Connect to the LD2450 module via Bluetooth
- Update the firmware to version 2.04.23101915 or later
[!WARNING] If upgrading the firmware version to 2.14 or later, you need to set the baud rate back to 256000 in the HLKRadarTool app. This version change seems to reset the baud rate, and Sentinel will no longer be able to communicate with the LD2450 module.
Parts
69| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 100n | Hardware Components:C_0402_1005Metric | C2, C3, C4, C6, C11, C12, C17, C18, C20, C24, C41 |
| 7 | 10k | Hardware Components:R_0402_1005Metric | R3, R4, R6, R7, R9, R10, R14 |
| 4 | 22u | Hardware Components:C_0805_2012Metric | C14, C15, C22, C23 |
| 4 | 5k1 | Hardware Components:R_0402_1005Metric | R1, R2, R16, R17 |
| 2 | 10u | Hardware Components:C_0805_2012Metric | C13, C16 |
| 2 | 10u | Hardware Components:C_0402_1005Metric | C1, C5 |
| 2 | 15pF | Hardware Components:C_0402_1005Metric | C9, C10 |
| 2 | 1u | Hardware Components:C_0402_1005Metric | C19, C21 |
| 1 | 100n | Hardware Components:C_0603_1608Metric | C25 |
| 1 | 10uH | Hardware Components:L_1210_3225Metric | L3 |
| 1 | 1N5819WS | Hardware Components:D_SOD-323 | D2 |
| 1 | 1k | Hardware Components:R_0402_1005Metric | R13 |
| 1 | 2.4nH | Hardware Components:L_0402_1005Metric | L1 |
| 1 | 220 | Hardware Components:R_0402_1005Metric | R5 |
| 1 | 22k1 | Hardware Components:R_0402_1005Metric | R12 |
| 1 | 2p4 | Hardware Components:C_0402_1005Metric | C8 |
| 1 | 2p7 | Hardware Components:C_0402_1005Metric | C7 |
| 1 | 3u3 | Hardware Components:L_Chilisin_BMRx00060630 | L2 |
| 1 | 470 | Hardware Components:R_0402_1005Metric | R15 |
| 1 | 54k9 | Hardware Components:R_0402_1005Metric | R8 |
| 1 | 69k8 | Hardware Components:R_0402_1005Metric | R11 |
| 1 | AQY212GSX | Hardware Components:SSR_SUPSiC_GAQY212GSX | K1 |
| 1 | Ant_RFECA3216060A1T_1206 | Hardware Components:Ant_RFECA3216060A1T | AE1 |
| 1 | BH1750FVI-TR | Hardware Components:BH1750FVI-TR | U6 |
| 1 | Conn_02x03_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | D_Schottky_Small | Hardware Components:D_0402_1005Metric | D1 |
| 1 | ECS-400-10-37B2-CKM-TR | Hardware Components:Oscillator_ECS_400-10-37B2-CKM-TR | Y1 |
| 1 | ESP32-C3 | Hardware Components:QFN-32-1EP | U1 |
| 1 | LD2450 | Hardware Components:LD2450 | U7 |
| 1 | LED_WS2812C | Hardware Components:LED_WS2812C-2020 | U8 |
| 1 | LMR54410DBVR | Hardware Components:SOT-23-6 | U4 |
| 1 | LOGO | Sentinel:Logo | G*** |
| 1 | LOGO | Sentinel:Magic Smoke Inside | G*** |
| 1 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1 |
| 1 | SHTC3 | Hardware Components:SHTC3-TR | U5 |
| 1 | SW_Push | Hardware Components:SW_PTS815SJM250SMTRLFS | SW2 |
| 1 | SW_Push | Hardware Components:SW_Panasonic_EVQPUC | SW1 |
| 1 | Screw_Terminal_01x04 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-4-2.54_1x04_P2.54mm_Horizontal | J2 |
| 1 | TPS2116DRLR | Hardware Components:SOTFL50P160X60-8N | U3 |
| 1 | TPS563201DDCR | Hardware Components:SOT-23-6 | U2 |
| 1 | USB_C_Receptacle_USB2.0_16P | Hardware Components:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
The 67 most common of 69 parts.
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Questions
How big is the Sentinel PCB?
It measures 23.2 × 43 mm and has 4 copper layers, 1.61 mm thick.
What parts does the Sentinel use?
69 parts, built around the ESP32-C3FH4, BH1750FVI-TR, SHTC3-TR-10KS and TPS563201DDCR. 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 Sentinel KiCad files?
From the nrwiersma/sentinel repository on GitHub, at the commit this page was made from: the board is Sentinel.kicad_pcb and its schematic ESP32.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sentinel 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).