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Home Appliance

Wireless Temperature Sensor

Have you ever wondered what the temperature was in your garage, attic, porch or anywhere in your home? A small, energy-efficient wireless temperature sensor enables the consumer to better understand their environment and adjust their environmental controls accordingly. This reference design can help kick-start your own connected home, smart appliances or smart energy designs.

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The Wireless Temperature Sensor reference design is part of Microchip’s Connected Home platform. At the heart of the design is a low-power nanoWatt XLP 16-bit PIC® Microcontroller, the PIC24F32KA302. The MCP9808 temperature sensor has an operation range from −40°C to +125°C. The temperature data is transmitted via the MRF89XAM8A/9A Sub-GHz wireless module. Two AA batteries provide power to the board.

For information on the Connected Home Concentrator, please email appliance@microchip.com.

Getting Started

Microchip Products

  • 16-bit MCU PIC24F32KA302
  • Sub-GHz module
    • Temperature sensor MCP9808
    • DC/DC converter MCP1640C

Key Features

  • Low-power nanoWatt XLP 16-bit PIC microcontroller
    • 20 nA in sleep mode
    • 500 nA RTCC operation in sleep mode
  • Long battery life
  • −40°C to +125°C temperature range
    • ±0.25°C accuracy
    • 0.1 μA sleep current
  • RF Module Agency Certifications for Europe, US, Canada, Australia & New Zealand

Available Reference Material

  • Circuit schematics
  • Gerber files (board layout)
  • Bill of materials

Home Appliance Video Channel