Best IO Modules of 2025

The DollaTek I/O Expansion Board offers a standard interface that can easily integrate with various development boards. This product features an I2C serial port that converts to an 8-bit parallel port, allowing you to expand capabilities up to 64 outputs. It utilises the PCF8574 IO expansion chip, ensuring efficient performance. Compatible with platforms like Arduino, AVR, and ARM, this board provides you with the versatility needed for diverse projects.

The Fasizi PCF8574 I/O Expander is a versatile module designed for various development boards. It features a standard interface, allowing you to easily expand your projects. With its I2C serial port converting to an 8-bit parallel port, you can connect up to 64 devices, enhancing your project's capabilities. This module is compatible with popular platforms like Arduino, AVR, and ARM, making it a convenient addition to your toolkit. Its pin or row seat design offers flexibility for different setups.

The EBYTE MA01 Module is a versatile device that allows you to control eight relay switch outputs remotely via the RS485 serial port. This product supports Modbus RTU protocols, making it compatible with various configuration software and PLCs, which means you can easily integrate it into your existing systems. Additionally, it operates on a DC power supply range of 8 to 28V, giving you flexibility in power options. With configurable communication baud rates, you can tailor the settings to suit your specific needs, ensuring smooth operation.

The UMTMedia V3.0 Breakout Board enhances your Arduino Nano by expanding its I/O capabilities, allowing you to connect more sensors and components with ease. Thanks to its screw terminals, you can make secure connections without the clutter of breadboards. Designed for seamless integration, this board works perfectly with the Arduino IDE, so you can programme your projects effortlessly. Additionally, it features a 3.3V output for powering sensors, ensuring you have everything you need for precise readings and effective project management.

The DAOKAI I/O Expansion Module is designed to enhance your projects by providing general-purpose remote I/O expansion through a two-wire bidirectional I2C-bus. This means you can easily connect multiple devices, expanding your I/O capabilities from 2 to 64. The module supports both pin and row seat interfaces, allowing flexible connections to various target boards. It is compatible with multiple platforms, including Arduino and AVR, making it a versatile choice for your development needs.

The XICOOLEE CAT9555 Module offers a versatile solution for your I/O needs with its 5V tolerant I/O and high drive capability, ensuring robust performance in various applications. Its compatibility with a 400 kHz I2C bus allows for seamless communication with other devices, making it easier to integrate into your projects. The polarity inversion register and active low interrupt output enhance control and flexibility, allowing you to manage signals effectively. Additionally, the internal power-on reset feature provides reliability by ensuring the module starts in a known state, giving you peace of mind.

The Zooz ZAC93 LR Module is designed for advanced users of Home Assistant and home automation systems. With the latest Z-Wave Long Range technology, you can expand your network coverage up to a mile, enhancing the reliability of your smart home setup. This module adds Z-Wave Plus and Long Range capabilities to your Raspberry Pi or Home Assistant Yellow hardware, allowing for a more robust DIY smart home experience. You'll need suitable home automation software to unlock its full potential, making it ideal for tech-savvy individuals.

The sb components Level Converter is an essential tool for safely connecting 5-24V signals to 3.3V or 5V devices. With its 4 or 8 channel options, you can easily manage multiple connections. The output voltage ranges from 3.3 to 5V DC, providing flexibility for various applications. Additionally, the board features 4 or 8 status LEDs, allowing you to monitor the status of each channel at a glance. This convenience ensures that you can quickly identify issues or confirm operations without hassle.

The Youmile PCF8574 Board offers remarkable flexibility for your projects. With its remote I/O expansion feature, you can easily connect additional devices using the two-wire I2C-bus, making it great for larger systems. The ability to expand up to 64 I/O ports with just two I/O modules saves you time and resources. The board supports both pin and row seat interface types, allowing you to choose the best connection method for your target board. Designed for a wide voltage range, it ensures compatibility with various platforms, enhancing your project’s versatility.

The CDBAIRUI MA01-AXCX4020 Module provides high protective isolation characteristics, ensuring stable and reliable operation. The input is optoelectrically isolated, and the device features a built-in DC-DC isolated power supply. With multiple protective features, including power pulse protection and reverse connection protection, you can avoid accidents caused by incorrect operations. Its industrial-grade quality guarantees stability even in extreme temperatures, ranging from -40 to +85°C. This reliability is crucial for maintaining uninterrupted performance in demanding environments.