Wi-Fi/BLE Temperature Sensor Node Design

flux

Parts selected: ESP32‑C6 module, Sensirion SHT41 I²C T/RH sensor, USB‑C receptacle, TI TPS25940L eFuse protection, and a low-Iq 3.3 V buck regulator. I’m adding the schematic now.

flux

Schematic wiring is in place for USB-C sink detection, protected 5 V, 3.3 V regulation, ESP32-C6 power/enable, and the SHT41 I²C interface. I’m checking and annotating it now.

flux

Built the USB-C powered Wi‑Fi/BLE temperature/humidity sensor node schematic and renamed the project to USB-C Wi-Fi BLE Environmental Sensor Node. It includes USB-C 5 V sink Rd resistors, TPS25940L input protection, 3.3 V low-Iq buck regulation, ESP32-C6-WROOM-1-N8, SHT41 I²C T/RH sensor, decoupling/bulk passives, net metadata, and ERC verification with no reported electrical warnings in the checked categories.
I also added project docs:
  • USB-C Wi-Fi/BLE Environmental Sensor Node (usb-c-wi-fible-environmental-sensor-node)
  • Bring-Up, Firmware, and Compliance Plan (bring-upc-firmwarec-and-compliance-plan)
Next step is PCB layout: place the USB-C/protection/regulator block, isolate the sensor from heat sources, and enforce the ESP32-C6 antenna keepout.
Start PCB layout
Tune protection values
Add programming access
Run schematic review
Optimize low power
Sign up to send
U1
L1 ~ - U4 OUT1

No results...

Learn to Add a Component

USB-C Wi-Fi BLE Environmental Sensor Node

USB-C Wi-Fi BLE Environmental Sensor Node thumbnail
Consumer USB-C powered low-power temperature/humidity sensor node with ESP32-C6 Wi-Fi/BLE and protected 5 V input

Properties

WiFi, Bluetooth

USB-C 5 V default sink; protected path planned for 0.5–3 A sources

USB-C 5 V input, internal 3.3 V rail

Consumer product; use certified radio module and plan FCC/CE/UKCA verification

Consumer IoT environmental sensing

Pricing & Availability

Distributor

Qty 1

Arrow

$2.85–$3.76

Digi-Key

$6.05

HQonline

$0.10

LCSC

$6.64

Mouser

$14.06

TME

$6.19

Verical

$1.32–$3.59

Controls