hasoni / Mid Red Esper Photo Analyser

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Temperature and Humidity Sensor Design

hasoni

hasoni

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.
17 days

flux

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You want a low-power consumer temperature/humidity sensor node with dual-radio Wi-Fi + BLE and protected USB-C 5 V input.
  • I’ve created a plan covering architecture, major parts, USB-C protection, power path, and schematic integration.
  • It’s ready to execute.
Click Start on the plan bar to build it. If you want, I can also update the plan first with extras like battery backup, enclosure limits, or a target size.
Plan
Goal
  • Design a consumer low-power temperature and humidity sensor node that integrates a digital temperature/humidity sensing element and an ultra-low-power MCU with integrated Wi-Fi and Bluetooth (supporting 2.4 GHz 802.11 b/g/n and BLE 5.x), powered from a USB-C 5 V source. The design must incorporate a USB-C receptacle with reverse polarity, over-voltage protection, under-voltage lockout, and over-current protection to ensure robust operation across USB sources delivering from 0.5 A to 3 A.
Implementation plan
  1. Define the system architecture
    1. Capture and document functional requirements and constraints including low-power operation, sensor integration, wireless dual-radio needs, and robust USB-C power input protection.
    2. Set the project description to reflect a sensor node for consumer environmental monitoring.
  2. Select and add major components to the schematic
    1. Select and add a digital temperature/humidity sensor (e.g., a common digital sensor from the library).
    2. Select and add an ultra-low-power MCU with integrated Wi-Fi and Bluetooth. For example, consider using a part like the ESP32 if it meets the power and wireless specifications.
  3. Establish the USB-C power entry subsystem
    1. Add a USB-C receptacle and configure its footprint.
    2. Integrate protection circuits for reverse polarity, over-voltage, under-voltage lockout, and over-current protection. Choose and add components (such as protection FETs/TVS diodes or dedicated power management ICs) that handle the range from 0.5 A to 3 A.
  4. Develop power regulation and supporting circuits
    1. Add regulators, filtering capacitors, and supporting passive components to achieve reliable 5 V operation.
    2. Connect the power path ensuring that all protection devices are correctly placed.
  5. Integrate interconnections and review the schematic
    1. Make and verify net connections between the sensor, MCU, and USB-C power entry/protection circuits.
    2. Cross-check the schematic against the functional requirements.
  6. Prepare documentation for prototype validation
    1. Finalize the schematic review and note test points for power integrity and sensor functionality.
    2. Update project properties and description to reflect the design status.
Success criteria
  • The schematic includes a digital temperature/humidity sensor integrated with a low-power MCU featuring dual Wi-Fi/Bluetooth radios.
  • The USB-C input path includes reverse polarity, over-voltage, under-voltage lockout, and over-current protection, and supports 0.5 A to 3 A power sources.
  • All components are correctly connected and the design meets the outlined power and functional requirements.
Add ESD and LEDs
Use ESP32-C6
Set board size
17 days
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Reviews

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    20.5M
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  • Generic Capacitor
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Mid Red Esper Photo Analyser

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