LC-081 Serial Temperature Scanner

The LC-081 or Layad Circuits’ Serial Temperature Scanner is a UART (“Serial”) interfaceable non-contact thermal reader. The device is designed to be used with a larger system with a any UART/Serial-capable host microcontroller such as Arduino or Raspberry Pi. It comes with all the necessary electronics to perform temperature scanning of people or objects and output the reading into its seven segment display and UART port via the attached female pinheader-terminated wires. The LC-081 comes in 3 distinct Modes and can use either Fahrenheit and Celsius as its unit of measurement.

The device aims to replace sensor-module solutions (e.g. MLX90614) by improving upon the issues accompanying such sensor-only implementation including the need for a separate proximity sensor, display, power regulator, level shifter, buzzer, enclosure, warning LEDs, and audio notification. It also simplifies use for human body temperature measurements as the device is pre-calibrated for such Finally, the difficulties associated with I2C implementation such as bus sharing issues or the need to for an external library are eliminated.


  • Ready interface port for microcontrollers via UART serial interface.
    • 9600 baud rate, 8 data bits, no parity,

and 1 stop bit

  • Simple serial text protocol
    • TX only at 3.3V logic
  • Modes
    • Body Mode
  • Surface Mode
  • Counting Mode
  • 2 Units of measurement
    • Celsius
  • Fahrenheit
  • Automatic Alarm for “high” readings
  • Accuracy : ±0.2 degrees
  • Measurement Distance: ~5-10 cm
  • Input power: 5V
  • Typical Power Consumption: <200mA
  • Peak Power Consumption: <450mA
  • Integrated casing, LCD readout and buttons
  • Works with both 5V and 3.3V logic
  • Response Time: ~0.5sec
  • Arduino, Raspberry Pi, ESP8266, ESP32 compatible


There are two sets of color codes for the wired header port of the device. Your unit should come in either one of them. Refer to the tables below.

Code 1: Brown-Red-Orange

Wire ColorFunction
BrownGND: (-) Ground
RedVCC: (+) 5Vdc power
OrangeTXD: Serial Transmit Pin. Connect to the serial receive pin of the host MCU.

Code 2: Black-White-Gray

Wire ColorFunction
BlackGND: (-) Ground
WhiteVCC: (+) 5Vdc power
GrayTXD: Serial Transmit Pin. Connect to the serial receive pin of the host MCU.