# USB\-C WiFi BLE T\-RH Sensor Node

## Description

USB\-C powered low\-power temperature and humidity sensor node with WiFi, Bluetooth LE, protected 5 V input, and digital environmental sensing\.

## Project Details

- **Owner:** lorenzo2120
- **Created:** 6/1/2026
- **Last Updated:** 6/1/2026
- **Visibility:** Public

## Key Components

### D1 — [USBLC6\-2SC6](https://flux.ai/lcsc/usblc6-2sc6~2e9x.md)

- JLCPCB Part Class: Extended Part
- Role: ESD Protection
- Manufacturer Name: UMW\(友台半导体\)
- Symbol Style: parametric\-v1
- Breakdown Voltage: 6V
- Manufacturer Part Number: USBLC6\-2SC6
- Operating Temperature: \-55°C \~ 125°C \(TJ\)
- Datasheet URL: https://www\.lcsc\.com/datasheet/C2687116\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNRTlhdUVdURFlXXzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D
- Maximum Clamping Voltage: 17V
- Part Type: ESD Protection Devices
- Role Details: USB 2\.0 D\+/D\- ESD clamp
- Package or Case Code: SOT\-23\-6\_L2\.9\-W1\.6\-P0\.95\-LS2\.8\-BL
- Peak Pulse Current: 5A
- Power: 150W
- LCSC Part Number: C2687116

**Pins:**
- GND [pin 2]
- I/O1 [pin 1]
- I/O1 [pin 6]
- I/O2 [pin 3]
- I/O2 [pin 4]
- VBUS [pin 5]

### D2 — [0603GBD0790S01](https://flux.ai/adrian95/0603gbd0790s01~iak.md)

- Part Type: LED
- Datasheet URL: https://mm\.digikey\.com/Volume0/opasdata/d220001/medias/docus/4336/0603GBD0790S01\.pdf
- Manufacturer Part Number: 0603GBD0790S01
- Manufacturer Name: ORIENTAL TECHNOLOGY
- Role Details: Firmware\-controlled low\-current activity indicator
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role: Status LED

**Pins:**
- A [pin 2]
- K [pin 1]

### J1 — [UJ20\-C\-H\-G\-SMT\-2\-P16\-TR](https://flux.ai/adrian95/uj20-c-h-g-smt-2-p16-tr~v05.md)

- Datasheet URL: https://www\.sameskydevices\.com/product/resource/uj20\-c\-h\-g\-smt\-2\-p16\-tr\.pdf
- Manufacturer Part Number: UJ20\-C\-H\-G\-SMT\-2\-P16\-TR
- Symbol Style: parametric\-v1
- Role Details: 5V sink input, USB 2\.0 data; connector rated for 0\.5\-3A source planning
- Manufacturer Name: Same Sky \(Formerly CUI Devices\)
- Role: USB\-C Connector
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Connector
- Mount: Surface Mount

**Pins:**
- CC1 [pin A5]
- CC2 [pin B5]
- DN1 [pin A7]
- DN2 [pin B7]
- DP1 [pin A6]
- DP2 [pin B6]
- GND [pin A1\_B12]
- GND\_\_1 [pin B1\_A12]
- SBU1 [pin A8]
- SBU2 [pin B8]
- SHIELD [pin SH1]
- SHIELD\_\_1 [pin SH2]
- SHIELD\_\_2 [pin SH3]
- SHIELD\_\_3 [pin SH4]
- VBUS [pin A4\_B9]
- VBUS\_\_1 [pin B4\_A9]

### SW1 — [TS\-1088\-AR02016](https://flux.ai/lcsc/ts-1088-ar02016~e3n1.md)

- Role: Boot Button
- Role Details: ESP32\-S3 GPIO0 bootloader entry
- Manufacturer Name: XUNPU\(讯普\)
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2409302330\_XUNPU\-TS\-1088\-AR02016\_C720477\.pdf
- JLCPCB Part Class: Extended Part
- Manufacturer Part Number: TS\-1088\-AR02016
- Product Info Url: https://lcsc\.com/product\-detail/Tactile\-Switches\_XUNPU\-TS\-1088\-AR02016\_C720477\.html
- LCSC Part Number: C720477
- Part Type: Tactile Switches
- Package or Case Code: SW\-SMD\_L3\.9\-W3\.0\-P4\.45

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### SW2 — [TS\-1088\-AR02016](https://flux.ai/lcsc/ts-1088-ar02016~e3n1.md)

- Manufacturer Name: XUNPU\(讯普\)
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2409302330\_XUNPU\-TS\-1088\-AR02016\_C720477\.pdf
- Role: Reset Button
- JLCPCB Part Class: Extended Part
- Role Details: Pull ESP32 EN low for reset
- Manufacturer Part Number: TS\-1088\-AR02016
- Product Info Url: https://lcsc\.com/product\-detail/Tactile\-Switches\_XUNPU\-TS\-1088\-AR02016\_C720477\.html
- LCSC Part Number: C720477
- Part Type: Tactile Switches
- Package or Case Code: SW\-SMD\_L3\.9\-W3\.0\-P4\.45

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### U1 — [ESP32\-S3\-WROOM\-1](https://flux.ai/kicad-part-library/esp32-s3-wroom-1~6lv.md)

- Role: MCU / Radio
- Datasheet URL: https://www\.espressif\.com/sites/default/files/documentation/esp32\-s3\-wroom\-1\_wroom\-1u\_datasheet\_en\.pdf
- Manufacturer Name: Texas Instruments Inc\.
- Manufacturer Part Number: ESP32\-S3\-WROOM\-1
- Part Type: RF Module
- Package or Case Code: ESP32\-S3\-WROOM\-1
- Role Details: Low\-power WiFi/BLE environmental sensor node controller

**Pins:**
- 3V3 [pin 2]
- EN [pin 3]
- GND [pin 1]
- GND [pin 40]
- GND [pin 41]
- IO0 [pin 27]
- IO1 [pin 39]
- IO10 [pin 18]
- IO11 [pin 19]
- IO12 [pin 20]
- IO13 [pin 21]
- IO14 [pin 22]
- IO15 [pin 8]
- IO16 [pin 9]
- IO17 [pin 10]
- IO18 [pin 11]
- IO19 [pin 13]
- IO2 [pin 38]
- IO20 [pin 14]
- IO21 [pin 23]
- IO3 [pin 15]
- IO35 [pin 28]
- IO36 [pin 29]
- IO37 [pin 30]
- IO38 [pin 31]
- IO39 [pin 32]
- IO4 [pin 4]
- IO40 [pin 33]
- IO41 [pin 34]
- IO42 [pin 35]
- IO45 [pin 26]
- IO46 [pin 16]
- IO47 [pin 24]
- IO48 [pin 25]
- IO5 [pin 5]
- IO6 [pin 6]
- IO7 [pin 7]
- IO8 [pin 12]
- IO9 [pin 17]
- RXD0 [pin 36]
- TXD0 [pin 37]

### U2 — [SHT40\-AD1B\-R2](https://flux.ai/lcsc/sht40-ad1b-r2~frfh.md)

- Manufacturer Name: Sensirion AG
- Part Type: Humidity Sensors/Temperature and Humidity Sensors
- Role Details: Digital T/RH sensor on 3\.3V I2C bus
- Package or Case Code: DFN\-4\_L1\.5\-W1\.5\-P0\.8
- JLCPCB Part Class: Extended Part
- Manufacturer Part Number: SHT40\-AD1B\-R2
- Role: Temperature/Humidity Sensor
- Symbol Style: parametric\-v1
- Datasheet URL: https://sensirion\.com/media/documents/33FD6951/67EB9032/HT\_DS\_Datasheet\_SHT4x\_5\.pdf

**Pins:**
- EP [pin 5]
- SCL [pin 2]
- SDA [pin 1]
- VDD [pin 3]
- VSS [pin 4]

### U3 — [TPS25210LRPWR](https://flux.ai/adrian95/tps25210lrpwr~9ww.md)

- Manufacturer Name: Texas Instruments
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/tps2521\.pdf?ts=1625110620252&ref\_url=https%253A%252F%252Fwww\.ti\.com%252Fstore%252Fti%252Fen%252Fp%252Fproduct%252F%253Fp%253DTPS25210LRPWR
- Part Type: Power Management
- Package or Case Code: TPS25210LRPWR
- Role: Input Protection
- Manufacturer Part Number: TPS25210LRPWR
- Role Details: Protected 5V path sized from \~560mA peak load; current limit target 0\.6\-1\.0A
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- DVDT\_1 [pin 7]
- DVDT\_2 [pin 14]
- EN/UVLO\_1 [pin 1]
- EN/UVLO\_2 [pin 12]
- GND [pin 8]
- ILM [pin 9]
- IN [pin 5]
- ITIMER\_1 [pin 10]
- ITIMER\_2 [pin 11]
- OUT [pin 6]
- OVCSEL [pin 2]
- PG [pin 3]
- PGTH\_1 [pin 4]
- PGTH\_2 [pin 13]

### U4 — [MP28301GG\-Z](https://flux.ai/monolithicpower/mp28301gg-z~ths.md)

- Product Image Url: https://www\.monolithicpower\.com/pub/media/catalog/product/m/p/mp28301\_tac\.jpg
- Package or Case Code: QFN\-2x2\_MP28301\_MNP
- Role: 3\.3V Regulator
- Manufacturer Part Number: MP28301GG\-Z
- Manufacturer Name: Monolithic Power Systems
- Product Info Url: https://www\.monolithicpower\.com/en/catalog/product/view/id/2983?utm\_source=ultralibrarian&utm\_medium=component\_search&utm\_campaign=listing
- Role Details: 5V to 3\.3V buck sized for ESP32 WiFi peak current
- Datasheet URL: https://www\.monolithicpower\.com/en/documentview/productdocument/index/version/2/document\_type/Datasheet/lang/en/sku/MP28301

**Pins:**
- CTRL1 [pin 2]
- CTRL2 [pin 3]
- CTRL3 [pin 4]
- CTRL4 [pin 5]
- CTRL5 [pin 6]
- GND [pin 8]
- OUT1 [pin 1]
- OUT2 [pin 12]
- PG1 [pin 7]
- SW [pin 9]
- VIN1 [pin 10]
- VIN2 [pin 11]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/lorenzo2120/usb\-c\-wifi\-ble\-t\-rh\-sensor\-node\~pz](https://flux.ai/lorenzo2120/usb-c-wifi-ble-t-rh-sensor-node~pz).*

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*Generated from [https://flux\.ai/lorenzo2120/usb\-c\-wifi\-ble\-t\-rh\-sensor\-node\~pz](https://flux.ai/lorenzo2120/usb-c-wifi-ble-t-rh-sensor-node~pz)*