Description M5Stack PbHUB Unit v1.1 is a compact I2C expansion unit that converts one Port B connection into six manageable channels. The PbHUB Unit gives M5Stack users a cleaner way to expand outputs, and it also works well as a tidy GPIO expansion module for projects that need more control without more wiring clutter. Built around the STM32F030, the M5Stack PbHUB Unit is a practical 6-channel expansion module for robotics, smart home control, embedded interaction, and compact automation. The PbHUB Unit can be used as an I2C expansion unit, a GPIO expansion module, and a small servo control hub inside a larger M5Stack system. Features M5Stack Port B to six-channel expansion design I2C expansion unit with default address 0x61 GPIO expansion module behavior for multi-channel signal control Servo control hub capability for motion and actuator projects 6-channel expansion module structure for compact M5Stack builds Supports GPIO, PWM, servo control, ADC sampling, and RGB light control Specifications Item Details Brand M5Stack Model PbHUB Unit v1.1 SKU U041-B Main controller STM32F030 Interface Port B / I2C Default I2C address 0x61 (modifiable by register) Expansion channels 6 Supported functions GPIO, PWM, servo control, ADC sampling, RGB light control Product size 48 x 24 x 12 mm Net weight 6.7 g Gross weight 11.8 g Applications Robotics projects that need a compact servo control hub Smart home control nodes with several outputs on one controller Small embedded devices that benefit from an I2C expansion unit Projects that need a cleaner GPIO expansion module Multi-output designs that need a tidy 6-channel expansion module Product List 1 x M5Stack PbHUB Unit v1.1 1 x HY2.0-4P cable (20 cm) Other Content Resources M5Stack PbHUB Unit v1.1 Official Documentation STM32F030 Reference Page Official UIFlow PbHUB Video FAQ What is the M5Stack PbHUB Unit used for?The PbHUB Unit is an I2C expansion unit and GPIO expansion module for M5Stack hardware that needs more controlled channels from one Port B connection. Can the PbHUB Unit act as a servo control hub?Yes. The PbHUB Unit works well as a servo control hub in robotics, actuator control, and motion projects. Why choose this 6-channel expansion module?This 6-channel expansion module helps M5Stack users scale peripherals while keeping I2C wiring cleaner and easier to manage.
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