Temperature and Humidity Sensor Node Design

flux

I’m blocked because the workspace has run out of execution credits, so I can’t modify the schematic, add parts, consult datasheets, or run design review right now.
Current project state:
  • Empty project: 0 components, 0 nets.
  • No schematic or layout work has been executed yet.
Recommended design plan when credits are available:
  • Use an ultra-low-power Wi-Fi + BLE 5.x MCU/module, likely an ESP32-C6, ESP32-S3, or similar certified module depending on power and availability.
  • Add a digital temperature/humidity sensor over I²C, such as SHT40/SHT41/SHT45, HDC302x, or similar.
  • USB-C 5 V input with default-sink CC resistors for 5 V operation.
  • Input protection chain sized for 0.5–3 A sources:
    • USB-C receptacle
    • CC pull-downs
    • ESD protection
    • fuse/eFuse or power-path protection with OCP
    • reverse-current blocking
    • OVP/UVLO protection
    • 5 V to 3.3 V regulator sized from a full power budget
  • Add proper decoupling, sensor pull-ups, programming/debug header, boot/reset support, antenna keepout, and regulatory documentation for consumer wireless use.
  • Validate with ERC/review and create bring-up documentation before layout.
Once credits are available, I can build the full schematic first, verify it against datasheets, and then ask for your approval before moving to PCB layout.
Choose main parts
Find wireless modules
Calculate power budget
Select protection ICs
Save requirements
No schematic yet

Talk to Flux to get started.

  • Generic Inductor
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  • Generic Capacitor
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Zeroth Coral Jetpack

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