Waveshare MLX90640 IR Array Thermal Imaging Camera Module

1. Introducción

This manual provides detailed instructions for the setup, operation, and maintenance of the Waveshare MLX90640 IR Array Thermal Imaging Camera Module. This module features a 32×24 pixel far-infrared thermal sensor array and communicates via an I2C interface, making it suitable for integration with various microcontrollers such as Raspberry Pi, Arduino (ESP32), and STM32.

Please read this manual thoroughly before using the product to ensure correct operation and to prevent damage.

2. Producto terminadoview y características

The MLX90640 Thermal Camera Module is designed for thermal imaging applications, offering a compact and efficient solution for temperature detection and visualization.

Figura 2.1: Frente view of the MLX90640 Thermal Camera Module, showing the infrared lens and connector.

Características principales:

• Sensor Array: Adopts MLX90640 far-infrared thermal sensor array with 32×24 pixels.
• Campo de View: Campo de 55° view for comprehensive thermal detection.
• Interfaz: Communicates via I2C interface, configurable to fast mode (up to 1MHz data rate).
• Sensibilidad a la temperatura: Noise Equivalent Temperature Difference (NETD) of 0.1K RMS @1Hz refresh rate.
• VolumentagCompatibilidad: Vol a bordotage traductor, compatible con voltaje operativo de 3.3V / 5Vtage.
• Compatibilidad: Designed for use with Raspberry Pi, Arduino (ESP32), and STM32 platforms.

Figura 2.2: Abajo view of the MLX90640 Thermal Camera Module, showing the Waveshare branding and model information.

3. Información de seguridad

• Descarga electrostática (ESD): Handle the module with care to prevent damage from electrostatic discharge. Use anti-static precautions.
• Fuente de alimentación: Asegúrese de que la fuente de alimentación voltage is within the specified range (3.3V/5V). Incorrect voltagPuede dañar el módulo.
• Conexiones: Always double-check wiring connections before applying power to avoid short circuits or incorrect operation.
• Entorno operativo: Avoid exposing the module to extreme temperatures, humidity, or corrosive environments.
• Cuidado de la lente: Do not touch the infrared lens directly. Clean only with a soft, lint-free cloth if necessary.

4. Guía de configuración

4.1. Descripción de la distribución de pines

The MLX90640 module uses an I2C interface for communication. The typical pin connections are as follows:

• CCV: Entrada de fuente de alimentación (3.3 V o 5 V).
• TIERRA: Conexión a tierra.
• ASD: Línea de datos en serie I2C.
• SCL: Línea de reloj serie I2C.

Figura 4.1: MLX90640 module with typical jumper wire connections for integration.

4.2. Connecting to a Microcontroller (e.g., Raspberry Pi)

1. Conexión de energía: Connect the VCC pin of the MLX90640 module to the 3.3V or 5V power output of your microcontroller. Connect the GND pin to the microcontroller's ground.
2. Conexión I2C: Connect the SDA pin of the MLX90640 module to the SDA pin of your microcontroller. Connect the SCL pin of the MLX90640 module to the SCL pin of your microcontroller. Refer to your specific microcontroller's documentation for I2C pin assignments.
3. Configuración del software: Install necessary libraries and drivers for the MLX90640 sensor on your chosen platform (Raspberry Pi, Arduino, STM32). Waveshare provides development resources and example code for these platforms.

For detailed software setup and programming examples, please refer to the official Waveshare documentation and development resources provided with the module.

5. Instrucciones de funcionamiento

5.1. Adquisición de datos

Once the module is correctly connected and the software environment is set up, you can begin acquiring thermal data. The MLX90640 sensor provides a 32×24 array of temperature readings, which can be processed to generate a thermal image.

• Comunicación I2C: The module communicates via I2C. Ensure your microcontroller's I2C bus is configured correctly and operating at the desired speed (up to 1MHz for fast mode).
• Velocidad de cuadros: The sensor can provide data at various refresh rates. The Noise Equivalent Temperature Difference (NETD) of 0.1K RMS is specified at a 1Hz refresh rate. Higher refresh rates may affect NETD.
• Datos de calibración: The MLX90640 sensor requires internal calibration data to be read and applied for accurate temperature measurements. This is typically handled by the provided software libraries.

5.2. Thermal Imaging Example

The module can be used to visualize temperature distributions, as shown in the example below with a Raspberry Pi.

Figura 5.1: Un example setup demonstrating the MLX90640 module capturing a thermal image of a Raspberry Pi, displaying temperature variations.

The software will typically convert the raw sensor data into a temperature matrix, which can then be rendered as a color-coded thermal image, where different colors represent different temperature ranges.

6. Mantenimiento

• Limpieza: Keep the module clean and free from dust. Use a soft, dry, lint-free cloth to gently wipe the module. Avoid using liquids or abrasive cleaners.
• Limpieza de lentes: The infrared lens is sensitive. If cleaning is absolutely necessary, use a lens cleaning cloth or a soft brush designed for optical components. Do not apply pressure.
• Almacenamiento: When not in use, store the module in an anti-static bag in a dry, cool environment, away from direct sunlight and extreme temperatures.
• Actualizaciones de firmware: Consulte periódicamente el sitio web oficial de Waveshare. website or development resources for any firmware updates or software library improvements.

7. Solución de problemas

Problem: Module not detected by microcontroller.

Solución:

• Verifique que todas las conexiones del cableado (VCC, GND, SDA, SCL) sean correctas y seguras.
• Asegúrese de que la fuente de alimentación voltage is within the 3.3V/5V range.
• Check if the I2C bus is enabled and configured correctly on your microcontroller.
• Confirm the I2C address of the MLX90640 module (usually fixed, but check documentation).

Problem: Incorrect or noisy temperature readings.

Solución:

• Asegúrese de que la lente esté limpia y sin obstrucciones.
• Verify that the correct calibration data is being applied by your software.
• Check for electromagnetic interference in the operating environment.
• Confirm the refresh rate setting; higher rates might introduce more noise if not handled correctly.

Problem: Software examples fail to compile or run.

Solución:

• Ensure all required libraries are installed and correctly linked in your development environment.
• Verify that your microcontroller's operating system or firmware is compatible with the provided exampLes.
• Check for any specific hardware configurations or jumpers required by the exampLes.

8. Especificaciones

Figura 8.1: Dimensional drawing of the MLX90640 Thermal Camera Module (dimensions in millimeters).

9. Garantía y soporte

This Waveshare product is covered by standard manufacturer warranty. For specific warranty terms and conditions, please refer to the official Waveshare websitio o comuníquese con su servicio de atención al cliente.

Apoyo técnico: Waveshare provides comprehensive development resources and manuals, including examples for Raspberry Pi, Arduino (ESP32), and STM32. These resources are essential for successful integration and operation of the module.

For further assistance, please visit the official Waveshare support page or contact their technical support team directly.