The **M5TS-02W-R** is a high-performance, non-contact infrared (IR) temperature sensor module developed by **Omic (Omron)**. It is designed for integration into medical, industrial, and consumer electronics where accurate, remote thermal measurement is required. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Technology** | Thermopile Array / MEMS Sensor | | **Temperature Range** | -20°C to +200°C (typical application range) | | **Output Type** | Digital I2C Interface | | **Accuracy** | Up to ±0.5°C (within specific medical ranges) | | **Supply Voltage** | 3.0V to 5.5V DC | | **Field of View (FOV)** | Approximately 90° (Standard Wide Angle) | | **Resolution** | 16-bit ADC | --- ### 2. Main Electronic Components The "W" in the part number often signifies a **Wide-angle** or **Water-resistant** specific housing, and the "R" typically denotes **Reel** packaging. Internally, the module consists of: * **MEMS Thermopile Element:** The core sensing unit that converts incoming infrared radiation into a tiny electrical voltage. * **Thermistor:** An internal reference sensor used for "Ambient Temperature Compensation." Since IR sensors measure the difference between the object and the sensor itself, this component is critical for accuracy. * **ASIC (Application-Specific Integrated Circuit):** A dedicated chip that performs: * Signal amplification. * Analog-to-Digital Conversion (ADC). * Digital filtering and noise reduction. * **I2C Interface Circuitry:** Allows for simple 4-wire connection (VCC, GND, SDA, SCL) to microcontrollers like Arduino, ESP32, or STM32. --- ### 3. Pin Configuration and Connection The module typically utilizes a small-footprint connector. | Pin | Name | Description | | :--- | :--- | :--- | | 1 | **VCC** | Power Supply (3.3V / 5V) | | 2 | **SCL** | I2C Serial Clock | | 3 | **SDA** | I2C Serial Data | | 4 | **GND** | Ground | --- ### 4. Implementation Example (Pseudocode) To interface with the M5TS series, you would typically use a standard I2C library. ```cpp #include #define M5TS_ADDR 0x3A // Example I2C Address void setup() { Wire.begin(); Serial.begin(9600); } void loop() { Wire.beginTransmission(M5TS_ADDR); Wire.write(0x07); // Command to read object temperature Wire.endTransmission(); Wire.requestFrom(M5TS_ADDR, 2); if (Wire.available() <= 2) { int data = Wire.read() | (Wire.read() << 8); float tempC = data * 0.02 - 273.15; // Conversion formula Serial.println(tempC); } delay(500); } ``` --- ### 5. Common Applications * **Non-contact Thermometers:** Forehead or ear thermometers. * **Smart Home:** Microwave ovens, hair dryers, and AC units for surface monitoring. * **Industrial:** Monitoring overheating in electrical panels or moving machinery parts.