Step16 Unit with 16-bit Rotary Encoder (GSMR-16)

The Unit Step16 is a 16-position rotary encoder with STM32G031G8U6, displaying real-time 0–F hex values on a 7-segment display. It communicates over I2C with configurable direction, modes, RGB LED colour, and address for multi-device setups.

M5 Stack Step16 Unit with 16-bit Rotary Encoder (GSMR-16) is a 16-position rotary encoder control unit based on the STM32G031G8U6 microcontroller. Its core function is to acquire the BCD value of the rotary encoder in real time and visualise the 0–F hex value through the integrated 7-segment display. The device communicates via an I2C interface and supports configuration of the rotation increment direction, display operating mode, RGB LED colour, and I2C address, allowing multiple encoder units to be used on the same bus. Featuring a clean and efficient design, it provides effective physical interaction control and real-time visual feedback, making it ideal for smart interactive devices (e.g., smart-home control panels), control interfaces (e.g., volume adjustment, RGB lighting control, motor speed regulation), and STEAM education hardware prototyping and teaching.

Features

* 16-position BCD rotary encoder

* Integrated numeric display for encoder value

* Adjustable display brightness and operating mode

* Configurable clockwise/counter-clockwise direction

* Programmable RGB LED colour/brightness

* I2C communication with configurable address

* Development Platform

* UiFlow1

* UiFlow2

* Arduino IDE

Specifications

MCU STM32G031G8U6, 32-bit ARM Cortex-M0+, 64 MHz

Step Encoder 16 positions, 8421 BCD code

Encoder Display 7-segment display

Programmable RGB 1 x WS2812

Value Update Cycle 100 ms

Interface I2C @0x48, address range 0x08 ~ 0x77, data retained after power-off

Standby Current DC 5 V @ 5.85 mA

Operating Current Display LEDs 60%: DC 5 V @ 14.76 mA Display LEDs 100%: DC 5 V @ 24.13 mA RGB LED 100%: DC 5 V @ 18.9 mA Display LED + RGB: DC 5 V @ 29.91 mA

Product Size 32.0 x 24.0 x 16.9mm

Product Weight 5.5g

Package Size 138.0 x 93.0 x 13.0mm

Gross Weight 10.9g

Resources

* Product Documents

Package Contents

* 1 x Unit Step16

* 1 x Grove Cable (20cm)