Temperature and Humidity Sensor Node Design
Make me a temperature and humidity sensor node with Wifi and Bluetooth, powered by USB-C (5V).
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.
189 days
3:05
Accessing knowledge base.
I will create your low‑power USB‑C‑powered Wi‑Fi/BLE environmental T/RH sensor node.
Plan:
- Add power‑input, protection, regulation, processing, and sensing blocks.
- Wire CC, protected input path, 3.3 V rail, control bus, straps, and decoupling.
- Set layout rules, ground plane, antenna keepout; place and route.
- Run ERC/DRC and availability reviews; refine.
Before I start: do you prefer a module or discrete radio SoC, any sensor accuracy target (e.g., ±1.5% RH), and is USB data needed or power‑only? Click Start on the plan when ready.
Plan
Goal
- Design a low-power environmental T/RH sensor node for the Fragile Crimson Carbonite Freezer project that integrates dual-radio Wi‑Fi (802.11 b/g/n) and BLE 5.x connectivity. The node is powered by USB‑C (5 V default) and must implement robust input protection including reverse polarity, OVP, UVLO, and OCP, while supporting current sources from 0.5 to 3 A. The deliverable includes a complete schematic and routed PCB layout meeting the specified constraints.
- USB‑C Power and Protection Design
- Add a USB‑C power sink component with correct CC line handling.
- Select and add protection circuits/components implementing reverse polarity, OVP, UVLO, and OCP on the VBUS line.
- Power Regulation
- Add a 5 V to 3.3 V regulator circuit along with appropriate decoupling and filtering components.
- Radio and Environmental Sensor Integration
- Select and add a dual-radio MCU module supporting Wi‑Fi (802.11 b/g/n) and BLE 5.x.
- Select and add a digital temperature and humidity sensor.
- Connect the sensor to the MCU via I2C, and add necessary pull‑up resistors and decoupling capacitors.
- Schematic Assembly and Verification
- Make all schematic connections including proper routing for CC, VBUS, 3.3 V rail, I2C, and boot/strap circuits.
- Verify all critical power paths and protection elements are correctly implemented.
- PCB Layout Setup
- Define and set up a PCB with a proper ground plane, layout rules, and an RF antenna keepout area.
- Place the critical power and RF components using Auto-Layout ensuring optimal routing for high-frequency signals.
- Final Design Validation
- Run ERC/DRC checks and perform part availability reviews.
- Iterate design adjustments as needed to finalize a production-grade schematic and PCB layout.
- Complete schematic accurately includes USB‑C power handling, regulation from 5 V to 3.3 V, and incorporation of reverse, OVP, UVLO, and OCP protection for 0.5–3 A current sources.
- Successful integration of dual‑radio Wi‑Fi (802.11 b/g/n) and BLE 5.x MCU along with a T/RH sensor using proper I2C connectivity and support circuitry.
- PCB layout meets grounding, RF, and power distribution requirements with verification via ERC/DRC checks.
Module + sensor + USB-only
Discrete SoC + high accuracy
Module + BME280 + USB data
PICO-D4 + SHTC3 + sink-only
Library search parts
189 days
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