The M5Stack U040-B-V21 (PaHub v2.1) is a peripheral module used to split a single I2C bus into six independent communication channels. The solution enables simultaneous operation of multiple I2C devices, including modules with identical I2C addresses, by switching the active communication channel.
The design is based on the PCA9548AP and provides six Grove (HY2.0-4P) ports, allowing direct connection of M5Stack sensors and modules. A DIP switch enables configuration of the module’s I2C address in the range 0x70–0x77, which allows cascading multiple PaHub modules within a single system. The module is used in IoT projects, automation, measurement systems, and advanced prototypes that require a large number of I2C devices.
Manufacturer BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Responsible person BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
ATOM Lite development kit complete with programmable AC/DC HUB switch module. M5Stack ATOM SWITCH
ATOM Lite development kit complete with DRV8825 stepper motor driver module. M5Stack ATOM STEPMOTOR
ATOM Lite development kit complete with microSD card reader up to 16 GB. M5Stack K044
The universal DIY prototype module from the M5stack series with M-BUS connector. M5Stack M032
Lipo battery with a capacity of 750 mAh for the M5Stack sets. Modules can be connected in parallel and stacked. M5Stack M002
A 16-channel servo driver module designed to work with the M5Stack sets. It is powered with the voltage from 6 to 12 V. M5Stack M014-B
Prototype kit for use in industry. It includes a prototype board with an M-BUS connector, TTL-RS485 converter, connectors and a DIN rail. M5Stack Base26
MEMS SPM1423 digital microphone module with PDM modulation. It communicates via the I2S interface. M5Stack U089
Module with gas sensor SGP30. It allows you to measure the content of total volatile organic compounds (TVOC), carbon dioxide equivalent (eCO2), ethanol and H2 in the air. M5Stack U088
Module with three Hall sensors A3144E, which react to the failure of the magnet. It is powered with 5 V and has a digital output on the Grove connector. M5Stack U084
Module with receiver designed for communication by means of a laser beam transmitted in the air. M5Stack Laser.Rx Unit
Module with a transmitter designed for communication via a laser beam transmitted in the air. M5Stack Laser.Tx Unit
Universal module for prototyping. It has 40 prototype fields with a diameter of 1 mm and a race of 2.54 mm and a Grove connector. M5Stack Mini Proto Unit
Module of a small fan driven by a DC motor. The set includes two propellers with a diameter of 60 mm. M5Stack Fan Unit
Compact module with vibration motor. It consists of a DC motor and an eccentric wheel. M5Stack Vibration Motor Unit
The module with a fingerprint sensor FPC1020A is designed for the M5Stack sets. The sensor has a built-in memory and can store up to 150 fingerprints. M5Stack U008
I2C bus splitter module based on the PCA9548AP, used for connecting multiple I2C devices to a single interface in M5Stack systems. M5Stack U040-B-V21