Temperature and Humidity Sensor Node Design
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.
11 days
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Plan
- Design a low-power consumer-grade temperature and humidity sensor node featuring digital temperature/relative-humidity sensing, an ultra-low-power MCU with integrated dual-radio (Wi-Fi 802.11 b/g/n and Bluetooth LE 5.x), and a USB-C power input. The design will include robust USB-C power entry with reverse protection, over-voltage protection (OVP), under-voltage lockout (UVLO), and over-current protection (OCP), ensuring compatibility with USB-C sources ranging from 0.5 A to 3 A.
#Implementation plan
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Define the System Architecture and Requirements
- Document the environmental sensing, low-power wireless communication, and power entry requirements in the project description.
- Specify design constraints for consumer use, including low power, reliability, and complete over-protection features.
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Develop the Schematic
- Add a USB-C receptacle component and design the power entry circuit with reverse protection, OVP, UVLO, and OCP. Connect voltage regulation stages as needed to supply the MCU and sensor.
- Add and configure the ultra-low-power MCU with integrated Wi-Fi and Bluetooth; connect its power supplies and ensure programming/debug connectivity if needed.
- Add a digital temperature and humidity sensor component; connect its power and data lines to the MCU.
- Integrate supporting components (passive, capacitors, resistors) that ensure stable operation across the expected current range from 0.5 A to 3 A.
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Validate and Review the Schematic
- Review connectivity between the USB-C power entry, MCU, and sensor.
- Verify that all protection circuits are correctly configured for the 5 V USB-C input.
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Prepare for PCB Layout
- Assign proper PCB footprints to each component.
- Configure board stackup and layout rules, emphasizing power-path integrity, RF performance, and sensor isolation.
- Plan placement constraints and outline RF and grounding strategies for the wireless MCU and associated circuitry.
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Set Project Metadata
- Update the project properties with a detailed description and technical summary of the design.
#Success criteria
- The schematic includes all required modules: USB-C power entry with all protection circuits, an ultra-low-power MCU with integrated Wi-Fi/BLE, and a digital temperature/humidity sensor.
- All components, net connections, and supporting circuitry meet the design requirements.
- The design is well-documented with clear project properties and a detailed description of the consumer-grade low-power environmental node solution.
Add power protection
Use ESP32-C6
Pick sensor options
11 days
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