{"product_id":"m5stack-pahub-v2-i2c-hub-6-port-expansion-multiplexer","title":"M5Stack PaHub V2 I2C Hub – 6-Port Expansion Multiplexer","description":"\u003cp\u003eThe \u003cstrong\u003eM5Stack PaHub V2\u003c\/strong\u003e is a compact, plug-and-play \u003cstrong\u003eI2C multiplexer hub\u003c\/strong\u003e that expands a single I2C port into \u003cstrong\u003esix independent I2C channels\u003c\/strong\u003e. Designed for IoT developers, electronics enthusiasts, and makers, it solves the common address-conflict problem when connecting multiple I2C sensors or modules to one microcontroller — all without complex wiring or additional code overhead.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose the M5Stack PaHub V2?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6-Channel I2C Expansion:\u003c\/strong\u003e Multiply one I2C bus into six fully isolated ports, allowing you to connect up to six I2C devices — even those sharing the same address — simultaneously.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Convenience:\u003c\/strong\u003e Simply connect via the Grove\/GROVE-compatible connector. No soldering required — ready to integrate into your project immediately.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Stackable Design:\u003c\/strong\u003e The PaHub V2 features M5Stack's signature modular form factor, making it easy to stack with other M5Stack units and modules.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Works seamlessly with M5Stack cores (M5Core, M5Stick, ATOM, etc.) and any microcontroller platform supporting the standard I2C protocol, including Arduino and ESP32-based boards.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTCA9548A I2C Switch Chip:\u003c\/strong\u003e Built around the reliable TCA9548A multiplexer IC for stable, low-latency channel switching and clear bus isolation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIoT \u0026amp; Development Ready:\u003c\/strong\u003e Perfect for smart home automation, environmental monitoring arrays, robotics sensor arrays, and prototyping complex sensor networks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCommunication Protocol:\u003c\/strong\u003e I2C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Expansion Ports:\u003c\/strong\u003e 6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCore IC:\u003c\/strong\u003e TCA9548A I2C Switch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDefault I2C Address:\u003c\/strong\u003e 0x70\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Grove (4-pin)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 3.3V \/ 5V compatible\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Platforms:\u003c\/strong\u003e M5Stack ecosystem, Arduino, ESP32, Raspberry Pi, and other I2C-capable boards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eForm Factor:\u003c\/strong\u003e M5Stack Unit (modular, compact)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's in the Box?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1× M5Stack PaHub V2 I2C Hub Unit\u003c\/li\u003e\n  \u003cli\u003eConnecting cables (as pictured)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIdeal Use Cases\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eConnecting multiple sensors with identical I2C addresses (e.g., multiple temperature, humidity, or pressure sensors)\u003c\/li\u003e\n  \u003cli\u003eSmart home and building automation systems\u003c\/li\u003e\n  \u003cli\u003eRobotics and drone sensor arrays\u003c\/li\u003e\n  \u003cli\u003eEnvironmental monitoring stations\u003c\/li\u003e\n  \u003cli\u003eEducational electronics and IoT prototyping labs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more guidance on I2C communication protocols and standards in embedded electronics development, visit the \u003ca href=\"https:\/\/www.nist.gov\/topics\/electronics\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST Electronics Resources\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does the M5Stack PaHub V2 I2C Hub do?\u003c\/h4\u003e\n\u003cp\u003eA: The M5Stack PaHub V2 is an I2C multiplexer that expands a single I2C bus into six independent channels. This allows you to connect up to six I2C devices — including multiple devices with the same I2C address — to one microcontroller without address conflicts. Simply connect the Grove cable and select channels via software to enable communication with each device.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the M5Stack PaHub V2 compatible with Arduino and ESP32 boards?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The PaHub V2 is compatible with any microcontroller or development board that supports the standard I2C protocol, including Arduino, ESP32, Raspberry Pi, and the full M5Stack ecosystem. M5Stack also provides official libraries and example code to help you get started quickly.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I connect multiple I2C devices with the same address using this hub?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. That's one of the primary benefits of the PaHub V2. Because it isolates each of its six ports as separate I2C buses, devices that share the same I2C address can be placed on different channels and addressed individually — eliminating the bus conflict problem common in multi-sensor projects.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the default I2C address of the PaHub V2, and can it be changed?\u003c\/h4\u003e\n\u003cp\u003eA: The PaHub V2 defaults to I2C address 0x70 (based on the TCA9548A chip). The address can be adjusted via the onboard solder jumper pads, allowing multiple PaHub V2 units to coexist on the same bus if needed.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the M5Stack PaHub V2 I2C Hub do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The M5Stack PaHub V2 is an I2C multiplexer that expands a single I2C bus into six independent channels. 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