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Product Description

M5Stack Official I2C Hub 1 to 6 Expansion Unit (PCA9548APW)

Description

PaHUB2, is an I2C Expandable Hub, which can expand a single I2C HY2.0-4P interface and connects up to 6 I2C channels. It allows you to mount slave devices with the same I2C address (by polling control the different channels to achieve in-device coexistence). Embedded PCA9548AP-I2C multi-channel switch IC, Save you worries with insufficient I2C interface of the expansion.

Product Features

I2C HY2.0-4P PORTA expansion
2x LEGO compatible holes
Support multiple nesting
1-6 expansion

Include

1x Pahub2 Unit
1x HY2.0-4P Cable

Application

I2C device expansion

Note: When it's connected, the PaHUB2 will be polling control the different channels to achieve in-device coexistence. Please pay attention to the order of channels when programming.

Please refer to the schematic and PCA9548AP data manual, the Unit can modify the I2C address of the device by adapting the level combination of A0~A2 pins. (The default address is 0x70)

3 Position of Welding patch are reserved on the PCB board of the Unit, A0-A2 respectively, as shown in the figure below.

After welding the 0 ohm resistor, the corresponding pin will change from low level to high level. The pin level combination and its corresponding I2C address are shown in the table below.

Application

Smart Planting System

Building a smart planting system using M5Stack to monitor the lights, humidity, temperature, watering your plant automatically.

Q-Bot

We aim to build a robot that is effective in sanitizing surfaces without putting cleaners in harm's way.

3 in 1 Sanitiser Dispenser

1. I2C Expansion Hub: PaHUB2 is designed to expand a single I2C HY2.0-4P interface, allowing up to 6 I2C channels to be connected, facilitating multiple devices with the same I2C address.

2. PCA9548AP I2C Switch: The unit includes the PCA9548AP multi-channel I2C switch IC, enabling polling control of different channels, ensuring device coexistence on the same bus.

3. LEGO Compatibility: Features 2 LEGO-compatible holes for easy integration into creative builds or projects.

4. Multiple Nesting Support: PaHUB2 allows for multi-level nesting to support complex setups.

5. Customizable I2C Address: Users can modify the I2C address by adapting the A0, A1, and A2 pin configurations, with a default address of 0x70.

**Versatile Expansion Tool**

PaHUB2 serves as an essential I2C expansion solution, offering up to 6 I2C channels through a single HY2.0-4P interface. This allows for seamless integration of slave devices that share the same I2C address, utilizing polling control to ensure coexistence without conflict. Whether you're working on sensor arrays, smart systems, or robotics, PaHUB2 provides flexible expansion and control.

**Customizable and Efficient**

The built-in PCA9548AP I2C multi-channel switch enables efficient communication management, allowing for multiple devices to share a single I2C bus. By adjusting the level combination of A0 to A2 pins, users can modify the I2C address, offering versatility for complex setups. The two LEGO-compatible holes add further convenience for creative project designs.

**Compact and Ready for Expansion**

At just 48*24*12mm, PaHUB2 is compact yet powerful, providing I2C expansion in space-constrained environments. Its ability to support nesting adds flexibility, making it ideal for expanding I2C device capacity in smart planting systems, robotics, and automated solutions.