The **M5TS-201-R** is a high-performance, non-contact infrared (IR) thermopile sensor module developed by Mitsubishi Electric. It is specifically designed for thermal imaging and temperature detection in smart appliances and industrial automation. --- ## 1. Technical Specifications The following table highlights the core electronic characteristics of the M5TS-201-R: | Parameter | Specification | | :--- | :--- | | **Pixel Resolution** | 16 x 16 (256 pixels) | | **Operating Voltage** | 3.3V to 5.0V DC | | **Interface** | I2C (Inter-Integrated Circuit) | | **Field of View (FoV)** | 60° x 60° | | **Temperature Range** | -20°C to +200°C (Target) | | **Frame Rate** | 1 to 4 fps (Adjustable) | | **Current Consumption** | Approx. 5mA (Active) | --- ## 2. Key Electronic Components & Architecture The M5TS-201-R is not just a sensor element; it is a complete **SoC (System on Chip)** solution. ### A. Thermopile Array The core consists of a 16x16 silicon-based thermopile array. Unlike single-point IR sensors, this array creates a "thermal map" by detecting infrared radiation across 256 individual zones simultaneously. ### B. Signal Processing ASIC The module includes an integrated Application-Specific Integrated Circuit (ASIC) that performs the following: * **ADC (Analog-to-Digital Converter):** Converts the tiny analog voltages from the thermopiles into digital data. * **Temperature Compensation:** It has a built-in reference thermistor to compensate for changes in the sensor's own ambient temperature. * **Noise Reduction:** Digital filters are applied to ensure stable readings. ### C. Digital Interface (I2C) Communication is handled via a standard I2C bus. This allows developers to read the temperature data using simple commands. * **SDA/SCL Pins:** Data and Clock lines. * **Address:** Typically fixed, allowing it to coexist with other sensors on the same bus. --- ## 3. Pin Configuration The physical connection usually involves a small-pitch connector. The standard pinout functions are: 1. **VDD:** Power supply (3.3V / 5V). 2. **GND:** Ground. 3. **SDA:** I2C Serial Data line. 4. **SCL:** I2C Serial Clock line. 5. **INT (Optional):** Interrupt signal to alert the host MCU when data is ready. --- ## 4. Typical Application Circuit When integrating this part into a circuit, pull-up resistors are required for the I2C lines. ```cpp // Example: Basic I2C Logic for M5TS-201-R #include void setup() { Wire.begin(); // Initialize I2C Serial.begin(115200); } void loop() { // 1. Send command to sensor to start conversion // 2. Wait for data ready // 3. Read 256 pixel values via I2C // 4. Convert raw data to Celsius } ``` --- ## 5. Applications * **Microwave Ovens:** Detecting food temperature to prevent boiling over. * **Air Conditioners:** Identifying the location of humans in a room to direct airflow. * **Industrial Monitoring:** Detecting hotspots in electrical panels or machinery.