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.
1:26
Thought for 4 sec
Analyzing in depth.
Thought for 3 sec
Thought for 41 sec
Thought for a moment
I've made a plan, and started work on it.
Plan
- Design a consumer-grade temperature and humidity sensor node with integrated Wi-Fi and Bluetooth connectivity. The sensor node will be powered by a USB-C 5 V supply and designed as a low-power environmental sensor, incorporating an ultra-low-power dual-radio MCU (supporting 2.4 GHz 802.11 b/g/n and BLE 5.x) and a digital temperature and relative humidity sensor. The design will include a USB-C receptacle with complete power protection features (reverse, over-voltage, under-voltage lockout, and over-current) and will be engineered to handle 0.5–3 A typical USB-C sources.
#Implementation plan
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Define and document the project architecture:
- Update the project metadata and description to capture that this is a consumer, low-power environmental sensor node with dual-wireless (Wi-Fi and BLE) functionalities.
- Outline the functional blocks: USB-C power input and protection, 3.3 V power regulation, dual-radio MCU, digital temperature/RH sensor, and supporting passive components.
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Set up the USB-C power and protection circuitry:
- Add a USB-C receptacle from the Flux parts library.
- Include reverse polarity protection, over-voltage protection, under-voltage lockout, and over-current protection components, sized for a 0.5–3 A power source.
- Configure the 5 V input rail and ensure appropriate decoupling and filtering.
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Implement power regulation:
- Insert a 3.3 V regulator circuit to support the MCU and sensor, verifying sufficient decoupling capacitors and input/output filtering.
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Integrate the ultra-low-power dual-radio MCU module:
- Select and add an MCU that supports 2.4 GHz Wi-Fi (802.11 b/g/n) and BLE 5.x.
- Configure the MCU's power supply, programming interface, and RF considerations including antenna layout notes.
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Add the digital temperature and relative humidity sensor:
- Choose a sensor that supports digital output and low-power operation.
- Wire the sensor to the MCU, ensuring correct I²C/SPI or other digital interface connections.
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Interconnect functional blocks:
- Connect the USB-C input and protection circuitry to the 3.3 V regulator.
- Interconnect the 3.3 V supply rail to both the MCU and the sensor.
- Set up necessary signal routing between the MCU and the sensor while ensuring proper decoupling and layout rules.
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Validate the schematic with ERC/DRC checks:
- Review net connections, confirm appropriate power distribution and protection measures.
- Finalize the schematic ensuring all required protection and interfacing components are correctly configured.
#Success criteria
- A validated schematic that captures all required functional blocks (USB-C power, protective circuitry, 3.3 V regulation, MCU with Wi-Fi/BLE, digital sensor).
- Electrical protection measures are implemented for 5 V USB-C input handling 0.5–3 A sources.
- All components are interconnected correctly to support low-power operation and wireless connectivity.
- Design is ready to advance towards PCB layout, including RF and antenna placement recommendations for the dual-radio module.
Add ESD protection
Choose ESP32-C6
Add debug header
Run ERC/DRC
To get started, talk to Flux or create a New Document.
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