2 layers111.5 × 55.8 mm
TechLab
embeddedos-org/eCAD-Hardware-Products
Hardware designs + EE docs + Board datasheets of Multiple products
103 parts8MIT
2 layers57.5 × 72 mm
ESP32-Based Sensor PCB
blazjerman/ESP32-Based-Sensor-PCB4For updates or additional library formats, visit SnapEDA.
- Size
- 57.5 × 72 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 77
- Nets
- 91
- Pads
- 298
- Tracks, vias
- 434, 200
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 21 Jan 2025
- Updated
- 16 Aug 2026
Overview
ESP32-Based Sensor PCB is an open-source printed circuit board by blazjerman, from the blazjerman/ESP32-Based-Sensor-PCB repository on GitHub, published under the MIT licence. It is a 2-layer board of 57.5 × 72 mm with 77 parts on 91 nets, routed with 434 tracks and 200 vias.
It is built around the CH340C, ESP32-WROOM-32E and THVD1400DRL, with the TLV62569DBVR-TP, TEMT6000X01 and USBLC6-2SC6-ES among its other parts. Its parts include 26 resistors, 17 capacitors, 9 connectors, 7 ICs and 6 transistors. It belongs with the sensors and measurement boards and the ESP32 boards of this library.
Main components
9
CH340C
SOP-16-20℃~+70℃ 2Mbps 3.3V、5V 50uA 7mA Transceiver USB 2.0 SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
ESP32-WROOM-32E
SMD,18x25.5mmSMD,18x25.5mm WiFi Modules ROHSEspressif SystemsWiFi Modules
THVD1400DRL
SOT-583-40℃~+125℃ 1 1 1.5mA 256 3V~5.5V 500Kbps Half-Duplex Transceiver ±12kV SOT-583 RS-485 / RS-422 ICs ROHSTexas InstrumentsRS-485 / RS-422 ICs
TLV62569DBVR-TP
SOT-23-51 1.5MHz 2.7V~5.5V 2A 40uA Adjustable Buck Built-in No SOT-23-5 DC-DC Converters ROHSTECH PUBLICDC-DC Converters
TEMT6000X01
1206-40℃~+100℃ 1.05mm 2mm 3nA 4mm Light Intensity 1206 Ambient Light Sensors ROHSVishay IntertechnologyAmbient Light Sensors
USBLC6-2SC6-ES
SOT-23-6L-40℃~+85℃ 0.6pF 15V 1uA 2 4.5A 5V 6V 70W@8/20us ESD IEC 61000-4-2 Unidirectional SOT-23-6L ESD and Surge Protection (TVS/ESD) ROHSElecSuperESD And Surge Protection (TVS/ESD)
MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)CDSOT23-SM712
SOT-23-55℃~+125℃ 13.3V 150W 15V、25V 500nA 75pF 7A 7V、12V Bidirectional ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 SOT-23 ESD and Surge Protection (TVS/ESD) ROHSGOODWORKESD And Surge Protection (TVS/ESD)
LTST-G563EGBW
SMD5050-6P-40℃~+85℃ 1.6mm 120° 4.1mm 5.4mm Discrete Diode G:518nm、B:468nm、R:630nm G:520nm~530nm、B:465nm~475nm、R:617nm~629nm R:1.8V~2.6V、G:2.8V~3.8V、B:2.8V~3.8V R:130mW、G:114mW、B:114mW R:20mA、G:20mA、B:20mA R:560mcd~1120mcd、G:1400mcd~2800mcd、B:280mcd~560mcd SMD5050-6P RGB LEDs ROHSLite-OnRGB LEDs
README
README.mdESP32-Based Sensor PCB
Overview
This ESP32-based sensor board is designed for various sensing and communication applications. It includes multiple integrated components such as light sensors, an I2C multiplexer, an RGB LED, RS485 communication, UART, and more. Below is a breakdown of the board’s features and how to interface with it.
Features
- Light Sensor: TEMT6000X01 (Analog Output on IO35, requires 3.3V power, and has a 10kΩ pull-down resistor to GND).
- I2C Multiplexer: TCA9548APWR (Address: 0x70, ESP32 SDA: IO21, SCL: IO22; four outputs labeled SD0/SC0 to SD3/SC3).
- 9/12V Booster: TLV61046ADBVR (Enable pin: IO19; 9/12V output is available on a labeled terminal block. For 12V output, bridge JP1.)
- RS485 Communication: THVD1400DR
- DI (Data In): IO17
- RO (Receive Out): IO16
- NEG_RE_DE (writing at high reading at low): IO18
- Outputs: Terminal block labeled A & B
- External UART: Connected directly to ESP32 (TX: IO25, RX: IO26, available on a labeled terminal block).
- Sound Sensor Compatibility: RT-ZS-BZ-* (Uses UART on RX: IO12 and TX: IO14, operates on 5V).
- RGB LED:
- Red: IO13
- Green: IO02
- Blue: IO32
- Controlled via PWM signals and powered using transistors for higher current (Each LED draws ~20mA; see LTST-G563EGBW datasheet).
- General-Purpose Terminal Block: Connected to IO33 (Labeled "GP").
- Button: Button for any purpose (on press, it will pull I04 down).
- Power Outputs:
- 3.3V (Labeled "3.3V")
- 5V (Labeled "5V")
- 9/12V (Labeled "9/12V")
- USB Port: Used for power and ESP32 flashing. Includes ESD protection and a 1A fuse.
- Protection Features:
- RS485 protection diodes
- Overcurrent protection on all power terminals
Test Code
A software folder is included with example code for the Arduino IDE and ESP-IDF to test the board’s functionality. The folder contains examples for all features, making it easy to verify the hardware setup and operation.
Pinout Summary
| Component | ESP32 Pin | Notes |
|---|---|---|
| Light Sensor | IO35 | 3.3V, 10kΩ pull-down resistor |
| I2C Multiplexer | IO21 (SDA) / IO22 (SCL) | Address 0x70 |
| 9/12V Booster | IO19 | Enable pin |
| RS485 (MAX3485) | IO17 (DI) / IO16 (RO) / IO18 (RE/DE) | Terminal block labeled A & B |
| External UART | IO25 (TX) / IO26 (RX) | Direct ESP32 connection |
| Sound Sensor | IO12 (RX) / IO14 (TX) | RT-ZS-BZ-* sensor |
| RGB LED | IO13 (Red) / IO02 (Green) / IO32 (Blue) | Controlled via PWM |
| General Terminal | IO33 | Labeled "GP" |
| Button | I04 | pull down |
Licensing Information
- This project is licensed under the MIT License.
- Some symbols, footprints, and 3D models are sourced from SnapEDA and are licensed under CC-BY-SA.
For updates or additional library formats, visit SnapEDA.
Parts
77| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R5, R6, R10, R11, R12, R20, R21, R22, R25 |
| 10 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C3, C5, C6, C7, C8, C9, C10, C14, C15, C16 |
| 5 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5 |
| 4 | 10u | Capacitor_SMD:C_1206_3216Metric | C1, C2, C11, C13 |
| 4 | ~ | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad | H1, H2, H3, H4 |
| 3 | 4.7u | Capacitor_SMD:C_1206_3216Metric | C4, C12, C35 |
| 3 | 680 | Resistor_SMD:R_0603_1608Metric | R8, R9, R19 |
| 2 | 100 | Resistor_SMD:R_0805_2012Metric | R14, R15 |
| 2 | 120 | Resistor_SMD:R_0805_2012Metric | R7, R13 |
| 2 | 205k | Resistor_SMD:R_0603_1608Metric | R16, R18 |
| 2 | Screw_Terminal_01x06 | TerminalBlock:TerminalBlock_Xinya_XY308-2.54-6P_1x06_P2.54mm_Horizontal | J4, J6 |
| 2 | ~ | Connector_PinSocket_2.54mm:PinSocket_1x01_P2.54mm_Vertical | J10, J11 |
| 1 | 10uH | Inductor_SMD:L_Sunlord_SWPA4020S | L2 |
| 1 | 15k | Resistor_SMD:R_0603_1608Metric | R24 |
| 1 | 1A | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | 2.2uH | Inductor_SMD:L_Sunlord_SWPA4020S | L1 |
| 1 | 20k | Resistor_SMD:R_0603_1608Metric | R17 |
| 1 | 51k | Resistor_SMD:R_0603_1608Metric | R26 |
| 1 | 68k | Resistor_SMD:R_0603_1608Metric | R23 |
| 1 | Boot | Connector_PinHeader_2.00mm:PinHeader_1x02_P2.00mm_Vertical | J13 |
| 1 | CDSOT23-SM712 | Package_TO_SOT_SMD:SOT-23 | D1 |
| 1 | CH340C | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U3 |
| 1 | EN | Connector_PinHeader_2.00mm:PinHeader_1x02_P2.00mm_Vertical | J12 |
| 1 | ESP32-WROOM-32E | RF_Module:ESP32-WROOM-32E | U1 |
| 1 | LOGO | LOGO | G*** |
| 1 | LTST-G563EGBW | LTST-G563EGBW:LED_LTST-G563EGBW | D7 |
| 1 | SW_Push | Button_Switch_THT:SW_Tactile_SPST_Angled_PTS645Vx39-2LFS | SW1 |
| 1 | Screw_Terminal_01x08 | TerminalBlock:TerminalBlock_Xinya_XY308-2.54-8P_1x08_P2.54mm_Horizontal | J2 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | TCA9548APWR | Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm | U5 |
| 1 | TEMT6000X01 | TEMT6000X01:TRANS_TEMT6000X01 | Q6 |
| 1 | THVD1400DR | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U6 |
| 1 | TLV61046ADBVR | Package_TO_SOT_SMD:SOT-23-6 | U8 |
| 1 | TLV62569DBVR | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | USBLC6-2SC6-ES | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Molex-105017-0001 | J1 |
| 1 | ~ | Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Vertical | J9 |
Questions
How big is the ESP32-Based Sensor PCB PCB?
It measures 57.5 × 72 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ESP32-Based Sensor PCB use?
77 parts, built around the CH340C, ESP32-WROOM-32E, THVD1400DRL and TLV62569DBVR-TP. 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 ESP32-Based Sensor PCB KiCad files?
From the blazjerman/ESP32-Based-Sensor-PCB repository on GitHub, at the commit this page was made from: the board is ESP32-Based Sensor PCB.kicad_pcb and its schematic 3.3V_buck.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ESP32-Based Sensor PCB 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).
Similar boards
- 4 layers100 × 60 mm
Cyd obd adapter
ssjrocks/cyd-obd-adapter
Open low-level OBD-II adapter: ESP32 with HS-CAN, single-wire CAN, flex CAN, 2x K-line, L-line and pin voltage probes, exposed over BT Classic, BLE, WiFi and USB as a raw proxy. KiCad 10, JLCPCB-ready.
170 partsAGPL-3.0 - 2 layers95.9 × 95 mm
Hnr26-badge
nushackers/hnr26-badge-quacknroll
Hack&Roll 2026 "Quack & Roll" badge source files, for both hardware and firmware
77 parts8 - 4 layers25 × 74 mm
PTR mini pcb
PTR-projects/PTR_mini_hardware
Welcome to the KPPTR-hardware repository! This repository contains the design files for the hardware components used in the KPPTR project.
140 parts1MIT - 2 layers60 × 38 mm
USB Hub
hiralsinghal/USB-Hub
This is a USB hub. It has a USB-C port to connect to the device. It has two USB-A ports and two USB-C ports, which can be used for connecting more devices as it allows you to increase the number of ports available.
29 parts - 4 layers26 × 56 mm
PTR micro pcb
PTR-projects/PTR_micro_hardware
Welcome to the KPPTR-hardware repository! This repository contains the design files for the hardware components used in the KPPTR project.
115 partsMIT - 2 layers81.3 × 72.9 mm
- 2 layers210 × 297 mm
Fra clock
albertoboffi-PERSONAL/fra-clock
A one-off gift PCB designed in KiCad 10: an ESP32 clock with a ring of 180 WS2812B‑2020 LEDs, a photo printed in exposed copper on the front, two Makerverse 8 Ω / 5 W speakers driven by two MAX98357A I²S amplifiers…
428 parts