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Product description: PaHub v2.1 - 6-channel module with I2C multiplexer - PCA9548AP - Unit expansion module - M5Stack U040-B-V21
The M5Stack I2C Hub is a compact and highly functional I2C bus expansion module. Using the PCA9548AP chip , it allows you to split one I2C line into six independent channels , which solves the problem of a limited number of devices on one bus - especially in the case of repeated addresses. Version 2.1 introduces a convenient DIP switch that allows you to change the module's I2C address in the range of 0x70 to 0x77 , which allows you to connect many such devices in one application. Grove connectors ensure easy integration into the M5Stack ecosystem, and Lego -compatible holes increase the versatility of mounting in prototypes.
I2C connector hub - 6 channels - Unit expansion module for M5Stack development modules. 
The M5Stack I2C Hub is a compact and extremely functional I2C bus expansion module.Special Features
- PCA9548AP chip: supports switching between 6 I2C channels
- DIP switch: allows you to manually change the I2C address from 0x70 to 0x77
- 6 Grove connectors: make it easy to connect multiple sensors and modules
- Possibility of cascading units: for even more devices
- Lego compatible: mounting holes allow integration with educational structures
Multi-channel I2C bus expansion - ideal for IoT and education projects
The I2C Hub module is a particularly useful solution in complex projects where it is necessary to simultaneously connect many devices with the I2C interface - such as sensors, displays or communication modules. Thanks to the possibility of cascading and address selection, the user gains enormous design flexibility, eliminating address conflicts and minimizing hardware limitations. It will be ideal for both hobbyist and educational solutions, as well as professional IoT prototypes.
Technical specification of the module
- I2C chip: PCA9548AP (I2C multiplexer)
- Communication interface: I2C (address: 0x70 to 0x77 - set by DIP switch)
- Compatibility: M5Stack Ecosystem
- Number of I2C channels: 6 (Grove)
- Operating temperature: 0°C to 40°C
- Dimensions: 48 x 24 x 12 mm
- Weight: 7.1 g
Kit Contents
- 1x I2C Hub 1 to 6 Expansion Unit v2.1
- 1x Grove Cable (Length: 20cm)
It allows one I2C line to be divided into six independent channels, which solves the problem of a limited number of devices on one bus. 
