skhamkhaung / Musical Maroon Antigravity Battle Room

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Temperature and Humidity Sensor Design

skhamkhaung

skhamkhaung

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.
18 days

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You want a low-power consumer temperature/humidity sensor node with dual-radio wireless and protected USB-C power input.
  • I’ve created the Plan to build it in this project.
  • It covers system architecture, key sensing/wireless blocks, USB-C 5 V power entry, and reverse/OVP/UVLO/OCP protection, following the recommended multi-step plan workflow and a subsystem-based architecture breakdown .
  • Click Start on the plan bar to begin.
Let me know if you want any requirement changed first.
Plan
#Goal
  • Design a low-power consumer temperature and humidity sensor node that integrates a digital temperature/humidity sensor, an ultra-low-power MCU with dual-radio 2.4 GHz Wi-Fi (802.11 b/g/n) and BLE 5.x, and a USB-C power system with robust input protection (reverse polarity, over-voltage, under-voltage lockout, and over-current protection) that supports USB-C sources ranging from 0.5A to 3A.
#Implementation plan
  1. Define System Architecture
    1. Document and update the project description with the overall design goals including wireless connectivity, sensing, and power-protection needs.
    2. Establish architecture blocks for the MCU/radio, digital sensor, power supply and protection circuitry, and the USB-C power entry.
  2. Select and Add Key Components
    1. Select and add an ultra-low-power MCU with dual-radio capabilities (Wi-Fi 802.11 b/g/n and BLE 5.x) from the parts library.
    2. Select and add a digital temperature/relative-humidity sensor (e.g., SHT3x series or equivalent) and add it to the schematic.
  3. Implement Power and Protection Circuitry
    1. Add a USB-C connector to the design as the main power entry; specify support for 5V input.
    2. Select and add input protection components to safeguard against reverse polarity (e.g., protection diode or MOSFET based protection circuit).
    3. Implement over-voltage protection (OVP) circuitry using dedicated protection ICs or discrete components.
    4. Implement an under-voltage lockout (UVLO) using a voltage supervisor or regulator with built-in UVLO features.
    5. Add over-current protection (OCP) components, such as fuses or current-limiting circuits.
    6. Configure the power-path to handle a range from 0.5A to 3A from the USB-C source.
  4. Integrate Connectivity and Interface
    1. Connect the digital sensor to the MCU using appropriate digital communication (likely I²C or SPI), ensuring proper decoupling and signal integrity.
  5. Schematic and Circuit Review
    1. Double-check all interconnections between the MCU, sensor, and power/protection subsystems for compliance with electrical and design requirements.
    2. Validate that the power subsystem meets low-power and safety specifications.
  6. Update Project Properties
    1. Modify project description and metadata to reflect updated design requirements and system architecture.
#Success criteria
  • The schematic contains a digital temp/humidity sensor, an ultra-low-power MCU with dual radio connectivity, and a fully protected USB-C power input that accommodates 5V and 0.5A to 3A current range.
  • The power subsystem implements reverse polarity, over-voltage, under-voltage lockout, and over-current protection as specified.
  • The design is complete and reviewed for low-power and consumer-grade reliability requirements, ready for PCB layout integration.
Use ESP32-C6
Add ESD too
Target small enclosure
18 days
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