# USB-C WiFi BLE Sensor Node ## Description USB-C powered consumer environmental sensor node with ESP32-class Wi‑Fi/BLE connectivity, digital temperature/humidity sensing, protected 5 V input, and low-power 3.3 V electronics. ## Project Details - **Owner:** dsedhom - **Created:** 6/11/2026 - **Last Updated:** 6/11/2026 - **Visibility:** Public ## Key Components ### D1 — [USBLC6-2SC6](https://www.flux.ai/lcsc/usblc6-2sc6~2e9x.md) - Breakdown Voltage: 6V - Manufacturer Part Number: USBLC6-2SC6 - Manufacturer Name: UMW(友台半导体) - LCSC Part Number: C2687116 - Role: ESD Protection - Power: 150W - Operating Temperature: -55°C ~ 125°C (TJ) - Maximum Clamping Voltage: 17V - JLCPCB Part Class: Extended Part - Peak Pulse Current: 5A - Symbol Style: parametric-v1 - Part Type: ESD Protection Devices - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL - Role Details: USB 2.0 D+ and D- ESD clamp - Datasheet URL: https://www.lcsc.com/datasheet/C2687116.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNRTlhdUVdURFlXXzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D **Pins:** - GND [pin 2] - I/O1 [pin 1] - I/O1 [pin 6] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] ### J1 — [TYPE-C-2.0-16PIN-SMT-3-OR](https://www.flux.ai/lcsc/type-c-2p0-16pin-smt-3-or~957d.md) - Role: USB-C Connector - Package or Case Code: USB-SMD_TYPE-C16PIN-1 - Manufacturer Part Number: TYPE-C-2.0-16PIN-SMT-3-OR - Part Type: USB Connectors - JLCPCB Part Class: Extended Part - LCSC Part Number: C2987387 - Role Details: Sink-only default 5 V USB-C input; CC pull-downs required - Manufacturer Name: CIKI(皓富) **Pins:** - 17 [pin 17] - 18 [pin 18] - 19 [pin 19] - 20 [pin 20] - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin B1A12] - GND [pin A1B12] - SBU1 [pin A8] - SBU2 [pin B8] - VBUS [pin A4B9] - VBUS [pin B4A9] ### LED1 — [0603GBD0790S01](https://www.flux.ai/adrian95/0603gbd0790s01~iak.md) - Manufacturer Name: ORIENTAL TECHNOLOGY - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: LED - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/4336/0603GBD0790S01.pdf - Manufacturer Part Number: 0603GBD0790S01 - Role: Status Indicator - Role Details: Firmware-controlled low-current status LED **Pins:** - A [pin 2] - K [pin 1] ### SW1 — [TS-1088-AR02016](https://www.flux.ai/lcsc/ts-1088-ar02016~e3n1.md) - Role: Boot Button - LCSC Part Number: C720477 - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html - Role Details: Pull ESP32 boot strap low for programming mode - Manufacturer Name: XUNPU(讯普) - Manufacturer Part Number: TS-1088-AR02016 - Part Type: Tactile Switches - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302330_XUNPU-TS-1088-AR02016_C720477.pdf - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - JLCPCB Part Class: Extended Part **Pins:** - 1 [pin 1] - 2 [pin 2] ### SW2 — [TS-1088-AR02016](https://www.flux.ai/lcsc/ts-1088-ar02016~e3n1.md) - Package or Case Code: SW-SMD_L3.9-W3.0-P4.45 - Part Type: Tactile Switches - 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: Manual reset / EN pull-down button - Product Info Url: https://lcsc.com/product-detail/Tactile-Switches_XUNPU-TS-1088-AR02016_C720477.html - LCSC Part Number: C720477 - Manufacturer Name: XUNPU(讯普) - Manufacturer Part Number: TS-1088-AR02016 **Pins:** - 1 [pin 1] - 2 [pin 2] ### TP1 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Role Details: Measure protected USB 5 V rail - Part Type: Test Point - Role: Test Point - Testpoint Size: 0.5 **Pins:** - P1 [pin 1] ### TP2 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Testpoint Size: 0.5 - Part Type: Test Point - Role Details: Measure regulated 3.3 V rail - Role: Test Point **Pins:** - P1 [pin 1] ### TP3 — [Generic Testpoint](https://www.flux.ai/jharwinbarrozo/generic-testpoint~esx.md) - Role Details: Ground reference test point - Role: Test Point - Testpoint Size: 0.5 - Part Type: Test Point **Pins:** - P1 [pin 1] ### U1 — [ESP32-S3-MINI-1-N8](https://www.flux.ai/vasyl/esp32-s3-mini-1-n8~77x.md) - Role: MCU / Wireless Module - Role Details: ESP32-S3 Wi-Fi/BLE controller for sensor node; antenna keepout required - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-s3-mini-1_mini-1u_datasheet_en.pdf - Manufacturer Name: Espressif Systems - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ESP32-S3-MINI-1U-N8 - Part Type: RF Transceiver Module **Pins:** - 3V3 [pin 3] - EN [pin 45] - GND [pin 1] - GND__1 [pin 2] - GND__10 [pin 52] - GND__11 [pin 53] - GND__12 [pin 54] - GND__13 [pin 55] - GND__14 [pin 56] - GND__15 [pin 57] - GND__16 [pin 58] - GND__17 [pin 59] - GND__18 [pin 60] - GND__19 [pin 61] - GND__2 [pin 42] - GND__20 [pin 61_1] - GND__21 [pin 61_2] - GND__22 [pin 61_3] - GND__23 [pin 61_4] - GND__24 [pin 61_5] - GND__25 [pin 61_6] - GND__26 [pin 61_7] - GND__27 [pin 61_8] - GND__28 [pin 62] - GND__29 [pin 63] - GND__3 [pin 43] - GND__30 [pin 64] - GND__31 [pin 65] - GND__4 [pin 46] - GND__5 [pin 47] - GND__6 [pin 48] - GND__7 [pin 49] - GND__8 [pin 50] - GND__9 [pin 51] - IO0 [pin 4] - IO1 [pin 5] - IO10 [pin 14] - IO11 [pin 15] - IO12 [pin 16] - IO13 [pin 17] - IO14 [pin 18] - IO15 [pin 19] - IO16 [pin 20] - IO17 [pin 21] - IO18 [pin 22] - IO19 [pin 23] - IO2 [pin 6] - IO20 [pin 24] - IO21 [pin 25] - IO26 [pin 26] - IO3 [pin 7] - IO33 [pin 28] - IO34 [pin 29] - IO35 [pin 31] - IO36 [pin 32] - IO37 [pin 33] - IO38 [pin 34] - IO39 [pin 35] - IO4 [pin 8] - IO40 [pin 36] - IO41 [pin 37] - IO42 [pin 38] - IO45 [pin 41] - IO46 [pin 44] - IO47 [pin 27] - IO48 [pin 30] - IO5 [pin 9] - IO6 [pin 10] - IO7 [pin 11] - IO8 [pin 12] - IO9 [pin 13] - RXD0 [pin 40] - TXD0 [pin 39] ### U2 — [SHT40-AD1B-R2](https://www.flux.ai/lcsc/sht40-ad1b-r2~frfh.md) - Symbol Style: parametric-v1 - Package or Case Code: DFN-4_L1.5-W1.5-P0.8 - Part Type: Humidity Sensors/Temperature and Humidity Sensors - Role: Temperature/Humidity Sensor - Manufacturer Name: Sensirion AG - Role Details: I2C digital environmental sensor powered from 3.3 V - Manufacturer Part Number: SHT40-AD1B-R2 - JLCPCB Part Class: Extended Part - 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 — [MP5030GQH-Z](https://www.flux.ai/monolithicpower/mp5030gqh-z~76s.md) - Product Image Url: https://www.monolithicpower.com/pub/media/catalog/product/m/p/mp5030_tac.jpg - Package or Case Code: QFN10-1p5MMx2MM_MNP - Datasheet URL: https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP5030 - Manufacturer Part Number: MP5030GQH-Z - Product Info Url: https://www.monolithicpower.com/en/catalog/product/view/id/2877?utm_source=ultralibrarian&utm_medium=component_search&utm_campaign=listing - Role: Input Protection / Current Limit - Manufacturer Name: Monolithic Power Systems - Role Details: Protected USB input path sized for ~0.5–3 A sources; final current limit per datasheet verification **Pins:** - ADJ [pin 4] - CC1 [pin 10] - CC2 [pin 9] - DM [pin 2] - DP [pin 1] - GND [pin 6] - ILIM [pin 3] - IN [pin 7] - OUT [pin 8] - TEST [pin 5] ### U4 — [TCPP03-M20](https://www.flux.ai/adrian95/tcpp03-m20~vg0.md) - Role: USB-C Port Protection - Manufacturer Name: STMicroelectronics - Role Details: Type-C CC/VBUS OVP support for consumer USB-C input - Manufacturer Part Number: TCPP03-M20 - Part Type: Integrated Circuit - Package or Case Code: QFN50P400X400X80-21N-D - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.st.com/resource/en/datasheet/tcpp03-m20.pdf **Pins:** - CBIAS [pin 14] - CC1 [pin 1] - CC1C [pin 15] - CC2 [pin 3] - CC2C [pin 13] - EN [pin 20] - EP [pin 21] - FLGN [pin 19] - GDCG [pin 7] - GDCS [pin 8] - GDPG [pin 5] - GDPS [pin 6] - GND [pin 12] - I2C_ADD [pin 16] - IANA [pin 4] - ISENSE [pin 10] - SCL [pin 18] - SDA [pin 17] - VBUSC [pin 9] - VCC_VCONN [pin 2] - VSENSE [pin 11] ### U5 — [LMR33630BDDAR](https://www.flux.ai/lcsc/lmr33630bddar~o51d.md) - Manufacturer Name: TI(德州仪器) - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL-EP2.8-1 - Datasheet URL: https://www.ti.com/lit/ds/symlink/lmr33630.pdf - Role: 3.3 V Regulator - Part Type: DC-DC Converters - JLCPCB Part Class: Extended Part - LCSC Part Number: C544370 - Manufacturer Part Number: LMR33630BDDAR - Role Details: Buck regulator sized for ESP32 Wi-Fi/BLE peak current; target 3.3 V output **Pins:** - BOOT [pin 7] - EN [pin 3] - EP [pin 9] - FB [pin 5] - PG [pin 4] - PGND [pin 1] - SW [pin 8] - VCC [pin 6] - VIN [pin 2] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/dsedhom/usb-c-wifi-ble-sensor-node~bf](https://www.flux.ai/dsedhom/usb-c-wifi-ble-sensor-node~bf).* --- *Generated from [https://www.flux.ai/dsedhom/usb-c-wifi-ble-sensor-node~bf](https://www.flux.ai/dsedhom/usb-c-wifi-ble-sensor-node~bf)*