# USB-C WiFi BLE Environmental Sensor ## Description USB-C powered low-power temperature/humidity sensor node with ESP32-class Wi‑Fi/BLE 5.x connectivity, digital T/RH sensing, USB-C 5 V sink input, and protected 3.3 V power path sized for 0.5–3 A sources. ## Project Details - **Owner:** ksevenkat - **Created:** 6/1/2026 - **Last Updated:** 6/1/2026 - **Visibility:** Public ## Key Components ### D1 — [TPD2EUSB30A](https://www.flux.ai/vasy_skral/tpd2eusb30a~bg4.md) - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftpd2eusb30a - Manufacturer Name: Texas Instruments - Part Type: Protection - Manufacturer Part Number: TPD2EUSB30ADRTR **Pins:** - D- [pin 2] - D+ [pin 1] - GND [pin 3] ### J1 — [UJ20-C-H-G-SMT-2-P16-TR](https://www.flux.ai/adrian95/uj20-c-h-g-smt-2-p16-tr~v05.md) - Symbol Style: parametric-v1 - Part Type: Connector - Mount: Surface Mount - Manufacturer Part Number: UJ20-C-H-G-SMT-2-P16-TR - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Same Sky (Formerly CUI Devices) - Datasheet URL: https://www.sameskydevices.com/product/resource/uj20-c-h-g-smt-2-p16-tr.pdf **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] ### U1 — [ESP32-C3-MINI-1-N4](https://www.flux.ai/jecstronic/esp32-c3-mini-1-n4~wbz.md) - Symbol Style: parametric-v1 - Manufacturer Part Number: ESP32-C3-MINI-1-N4 - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-c3-mini-1_datasheet_en.pdf - Manufacturer Name: Espressif Systems - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 3V3 [pin 3] - EN [pin 8] - GND [pin 51] - GND [pin 36] - GND [pin 49_9] - GND [pin 1] - GND [pin 49_6] - GND [pin 46] - GND [pin 49_3] - GND [pin 43] - GND [pin 49_7] - GND [pin 39] - GND [pin 14] - GND [pin 41] - GND [pin 37] - GND [pin 53] - GND [pin 42] - GND [pin 49_2] - GND [pin 49_1] - GND [pin 45] - GND [pin 11] - GND [pin 38] - GND [pin 52] - GND [pin 2] - GND [pin 48] - GND [pin 49_4] - GND [pin 40] - GND [pin 49_5] - GND [pin 49_8] - GND [pin 44] - GND [pin 47] - GND [pin 50] - IO0 [pin 12] - IO1 [pin 13] - IO10 [pin 16] - IO18 [pin 26] - IO19 [pin 27] - IO2 [pin 5] - IO3 [pin 6] - IO4 [pin 18] - IO5 [pin 19] - IO6 [pin 20] - IO7 [pin 21] - IO8 [pin 22] - IO9 [pin 23] - NC [pin 35] - NC [pin 4] - NC [pin 10] - NC [pin 32] - NC [pin 7] - NC [pin 9] - NC [pin 28] - NC [pin 24] - NC [pin 15] - NC [pin 34] - NC [pin 29] - NC [pin 17] - NC [pin 33] - NC [pin 25] - RXD0 [pin 30] - TXD0 [pin 31] ### U2 — [SHT40-AD1F-R2](https://www.flux.ai/adrian95/sht40-ad1f-r2~wjk.md) - Manufacturer Name: Sensirion AG - Manufacturer Part Number: SHT40-AD1F-R2 - Datasheet URL: https://sensirion.com/media/documents/33FD6951/63E1087C/Datasheet_SHT4x_1.pdf - Part Type: Sensor - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - SCL [pin 2] - SDA [pin 1] - VDD [pin 3] - VSS [pin 4] ### U3 — [TPS259474LRPWR](https://www.flux.ai/lcsc/tps259474lrpwr~74ql.md) - Symbol Style: parametric-v1 - Datasheet URL: https://www.lcsc.com/datasheet/C2864845.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNRTlhdXlBVQVFWUTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - Manufacturer Part Number: TPS259474LRPWR - Part Type: Power Management - JLCPCB Part Class: Extended Part - Package or Case Code: VQFN-10_L2.0-W2.0-P0.45-TL - Manufacturer Name: TI(德州仪器) - LCSC Part Number: C2864845 **Pins:** - DVDT [pin 7] - EN/UVLO [pin 1] - GND [pin 8] - ILM [pin 9] - IN [pin 5] - ITIMER [pin 10] - OUT [pin 6] - OVLO/OVCSEL [pin 2] - PG/AUXOFF [pin 3] - PGTH/~{FLT} [pin 4] ### U4 — [AP63203WU-7](https://www.flux.ai/adrian95/ap63203wu-7~o8a.md) - Part Type: Integrated Circuit - Datasheet URL: https://www.diodes.com/assets/Datasheets/AP63200-AP63201-AP63203-AP63205.pdf - Manufacturer Name: Diodes Incorporated - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: AP63203WU-7 **Pins:** - BST [pin 6] - EN [pin 2] - FB [pin 1] - GND [pin 4] - SW [pin 5] - VIN [pin 3] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ksevenkat/usb-c-wifi-ble-environmental-sensor~0m](https://www.flux.ai/ksevenkat/usb-c-wifi-ble-environmental-sensor~0m).* --- *Generated from [https://www.flux.ai/ksevenkat/usb-c-wifi-ble-environmental-sensor~0m](https://www.flux.ai/ksevenkat/usb-c-wifi-ble-environmental-sensor~0m)*