# USB-C WiFi BLE Environmental Sensor ## Description USB-C powered WiFi/BLE temperature and humidity sensor node with protected 5V input and 3.3V sensor/MCU rail ## Project Details - **Owner:** fsdorado - **Created:** 5/7/2026 - **Last Updated:** 5/8/2026 - **Visibility:** Public ## Key Components ### J1 — [UJ20-C-H-G-SMT-2-P16-TR](https://www.flux.ai/adrian95/uj20-c-h-g-smt-2-p16-tr~v05.md) - Mount: Surface Mount - Manufacturer Name: Same Sky (Formerly CUI Devices) - Datasheet URL: https://www.sameskydevices.com/product/resource/uj20-c-h-g-smt-2-p16-tr.pdf - Symbol Style: parametric-v1 - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Part Number: UJ20-C-H-G-SMT-2-P16-TR **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-WROOM-02-N4](https://www.flux.ai/adrian95/esp32-c3-wroom-02-n4~gwb.md) - Part Type: Module - Manufacturer Part Number: ESP32-C3-WROOM-02-N4 - Datasheet URL: https://www.espressif.com/sites/default/files/documentation/esp32-c3-wroom-02_datasheet_en.pdf - Symbol Style: parametric-v1 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Espressif Systems **Pins:** - 3V3 [pin 1] - EN [pin 2] - GND_1 [pin 9] - GND_10 [pin 27] - GND_2 [pin 19] - GND_3 [pin 20] - GND_4 [pin 21] - GND_5 [pin 22] - GND_6 [pin 23] - GND_7 [pin 24] - GND_8 [pin 25] - GND_9 [pin 26] - IO0 [pin 18] - IO1 [pin 17] - IO10 [pin 10] - IO18 [pin 13] - IO19 [pin 14] - IO2 [pin 16] - IO3 [pin 15] - IO4 [pin 3] - IO5 [pin 4] - IO6 [pin 5] - IO7 [pin 6] - IO8 [pin 7] - IO9 [pin 8] - RXD [pin 11] - TXD [pin 12] ### U2 — [SHT40-AD1F-R2](https://www.flux.ai/adrian95/sht40-ad1f-r2~wjk.md) - Manufacturer Part Number: SHT40-AD1F-R2 - Part Type: Sensor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Sensirion AG - Datasheet URL: https://sensirion.com/media/documents/33FD6951/63E1087C/Datasheet_SHT4x_1.pdf **Pins:** - SCL [pin 2] - SDA [pin 1] - VDD [pin 3] - VSS [pin 4] ### U3 — [TPS25940LRVCR](https://www.flux.ai/adrian95/tps25940lrvcr~ojd.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Integrated Circuit - Manufacturer Name: Texas Instruments - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps25940.pdf - Manufacturer Part Number: TPS25940LRVCR **Pins:** - ~FLT [pin 20] - DEVSLP [pin 1] - DVDT [pin 18] - EN [pin 14] - EP [pin 21] - GND [pin 16] - ILIM [pin 17] - IMON [pin 19] - IN_1 [pin 9] - IN_2 [pin 10] - IN_3 [pin 11] - IN_4 [pin 12] - IN_5 [pin 13] - OUT_1 [pin 4] - OUT_2 [pin 5] - OUT_3 [pin 6] - OUT_4 [pin 7] - OUT_5 [pin 8] - OVP [pin 15] - PGOOD [pin 2] - PGTH [pin 3] ### U4 — [TPS62162QDSGRQ1](https://www.flux.ai/adrian95/tps62162qdsgrq1~y7t.md) - Manufacturer Name: Texas Instruments - Part Type: Power Management - Datasheet URL: http://www.ti.com/lit/gpn/tps62162-q1 - Package or Case Code: SON50P200X200X80-9N - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: TPS62162QDSGRQ1 **Pins:** - AGND [pin 4] - EN [pin 3] - EP [pin 9] - FB [pin 5] - PG [pin 8] - PGND [pin 1] - SW [pin 7] - VIN [pin 2] - VOS [pin 6] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/fsdorado/usb-c-wifi-ble-environmental-sensor~gj](https://www.flux.ai/fsdorado/usb-c-wifi-ble-environmental-sensor~gj).* --- *Generated from [https://www.flux.ai/fsdorado/usb-c-wifi-ble-environmental-sensor~gj](https://www.flux.ai/fsdorado/usb-c-wifi-ble-environmental-sensor~gj)*