Temperature and Humidity Sensor Node Design

skoegle

skoegle

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.
80 days

flux

1:03

Planning device specifications.

Clarifying component guidelines.

Understanding linking rules.

Avoiding component mentions.

Creating a high-level plan.

I’ll create a low-power USB-C (5 V) temperature/humidity node with dual‑radio Wi‑Fi (802.11 b/g/n, 2.4 GHz) + BLE 5.x and robust input protection (reverse/OVP/UVLO/OCP), suitable for 0.5–3 A sources.
Plan:
  1. Define architecture: compute+radio block, digital T/RH block, USB-C power, protection, regulation.
  2. Implement power path: CC, ESD, reverse/OVP/UVLO/OCP, 5 V to 3.3 V rail, bulk/decoupling.
  3. Connect sensor, programming, indicators; name nets.
  4. Prepare footprints, RF keepouts/grounding; place and auto-route.
  5. Run ERC/DRC, availability; finalize BOM and manufacturing files.
Before I start:
  • Any MCU/radio family preference (e.g., ESP32 class vs others)?
  • Antenna: PCB antenna, chip antenna, or external?
  • Sensor accuracy/grade target (e.g., ±1.5% RH, ±0.1 C) and package size constraints?
Pick MCU and antenna
Select T/RH sensor
USB-C default power
Protection + regulation
Mechanical constraints
80 days
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