karyn / Digital Chocolate Jetpack

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USB-C Temperature and Humidity Sensor Node

karyn

karyn

Make me a temperature and humidity sensor node with Wifi and Bluetooth, powered by USB-C (5V) for consumer use.
It should be a low-power environmental node with a digital T/RH sensor, ultra-low-power MCU with Wi-Fi + Bluetooth (dual-radio) — 2.4 GHz 802.11 b/g/n plus BLE 5.x powered by USB-C (5 V) — USB-C receptacle 5 V default; include reverse/OVP/UVLO/OCP protection and plan for 0.5–3 A sources.
20 days

flux

1:02

Planning the analysis.

Thinking deeply about your request.

Creating execution plan.

Drafting execution steps.

Focusing on implementation phases.

Working on your request.

Creating a high-level plan.

You want a low-power USB-C environmental sensor node with Wi-Fi + BLE, a digital T/RH sensor, and protected 5 V power entry.
  • I’ve built the plan.
  • It covers architecture, USB-C sink power entry, reverse/OVP/UVLO/OCP protection, sensor + radio MCU integration, and PCB prep.
  • The plan is ready to execute.
Click Start on the plan bar to have me build it, or tell me what you want changed first.
Plan
Goal
  • Design a low-power consumer temperature and humidity sensor node integrating a digital temperature/RH sensor, an ultra-low-power MCU with dual-radio 2.4 GHz Wi-Fi 802.11 b/g/n and Bluetooth LE 5.x, and a protected USB-C 5V power entry. The device must incorporate reverse polarity protection, over-voltage protection (OVP), under-voltage lockout (UVLO), and over-current protection (OCP) while operating with sources ranging from 0.5 A to 3 A.
Implementation plan
  1. Define system requirements and high-level architecture
    1. Update the project description to capture the low-power sensor node goals and consumer-grade constraints.
    2. Outline the digital sensor block, the ultra-low-power MCU block with Wi-Fi and Bluetooth dual-radio, and the protected power subsystem.
  2. Implement the USB-C 5V power entry and protection circuitry
    1. Place and configure a sink-only USB-C receptacle for power entry.
    2. Design and add protection circuits for reverse polarity, OVP, UVLO, and OCP.
    3. Verify circuit parameters for compatibility with power sources from 0.5 A to 3 A.
  3. Add sensor and MCU components
    1. Place a digital temperature and humidity sensor.
    2. Place an ultra-low-power MCU with integrated dual-radio 2.4 GHz Wi-Fi and Bluetooth LE 5.x.
    3. Connect the sensor to the MCU following recommended digital sensor interfaces (e.g. I²C or SPI).
  4. Review interconnections and prepare the schematic
    1. Verify that all major blocks (sensor, MCU, and power protection circuits) are properly connected.
    2. Confirm that protection circuitry is linked to the USB-C power line and other required nets.
  5. Prepare for PCB layout
    1. Ensure proper placement guidelines for RF performance, low-noise sensor interfacing, and robust power grounding.
    2. Document any layout considerations specific to USB-C power entry and dual-radio requirements.
Success criteria
  • The project schematic includes a digital temperature/RH sensor, an ultra-low-power MCU with dual-radio connectivity, and a fully protected USB-C 5V input.
  • The protection circuits correctly implement reverse polarity, OVP, UVLO, and OCP to support 0.5 A to 3 A power sources.
  • All interconnections are completed and verified for functional and electrical correctness, setting up the design for PCB layout and manufacturing review.
Add ESD too
Use ESP32-C6
Compact two-layer board
Include status LED
20 days
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