The **M5TS-701-R** is a high-precision, digital infrared (IR) temperature sensor module manufactured by Omron. It is designed for non-contact temperature measurement, making it ideal for industrial automation, medical equipment, and IoT applications. --- ## 1. Key Specifications The electronic characteristics of the M5TS-701-R define its accuracy and integration capabilities: | Feature | Specification | | :--- | :--- | | **Object Temp Range** | -40°C to +200°C | | **Supply Voltage (Vcc)** | 3.0V to 3.6V (DC) | | **Communication Interface** | I2C (Inter-Integrated Circuit) | | **Current Consumption** | ~5mA (Active), <100µA (Sleep) | | **Resolution** | 0.01°C | | **Accuracy** | ±2.0°C (depending on range and conditions) | | **Field of View (FoV)** | 90° (standard) | --- ## 2. Main Electronic Components The module is an integrated system-on-chip (SoC) solution. Internally, it consists of several critical stages: ### A. Thermopile Sensor Element * **Function:** Converts incoming infrared radiation from an object into a tiny electrical voltage (microvolts). * **Mechanism:** Uses the Seebeck effect through a series of thermocouples. ### B. Signal Conditioning (ASIC) * **Amplification:** Since the thermopile output is extremely weak, an internal low-noise amplifier boosts the signal. * **ADC (Analog-to-Digital Converter):** Converts the analog voltage into a digital 16-bit or 24-bit value for processing. ### C. Digital Signal Processing (DSP) * **Calibration:** The chip contains factory-calibrated coefficients stored in EEPROM. * **Linearization:** It automatically compensates for the non-linear relationship between IR radiation and temperature. ### D. Communication Interface * **I2C Pins:** Uses `SDA` (Data) and `SCL` (Clock) lines to communicate with a microcontroller (like an Arduino, ESP32, or PLC). --- ## 3. Pin Configuration The physical interface typically involves a small connector or solder pads: | Pin | Name | Description | | :--- | :--- | :--- | | 1 | **VCC** | Power supply (typically 3.3V) | | 2 | **SDA** | I2C Serial Data line | | 3 | **SCL** | I2C Serial Clock line | | 4 | **GND** | Ground | --- ## 4. Basic Connection Example To read data from the M5TS-701-R using a microcontroller, you would typically use a circuit similar to this: ```cpp // Pseudocode for I2C Initialization #include #define M5TS_ADDR 0x35 // Example I2C address void setup() { Wire.begin(); // Join I2C bus Serial.begin(9600); } void loop() { Wire.beginTransmission(M5TS_ADDR); Wire.write(0x00); // Register to read temperature Wire.endTransmission(); Wire.requestFrom(M5TS_ADDR, 2); if(Wire.available() <= 2) { int data = Wire.read() << 8 | Wire.read(); float temp = data * 0.01; // Example conversion Serial.println(temp); } delay(1000); } ``` ---