Module13.2 Stepmotor Driver is a stepper motor driver compatible with M5 controllers, utilizing the HR8825 stepper motor driver chip, providing 3 dual-channel stepper motor control interfaces. When stacked with an M5 controller, the internal ESP32 generates signals directly connected to the driver chip, enabling independent control or multi-axis motor coordination. The module integrates a TCA9554 IO expansion chip, offering 4 sets of input signal terminals + 3 sets of stepper motor microstep control + 1 set of driver chip enable control, controlled via the I2C interface. It can monitor and control the status of these 8 expanded IOs, suitable for external limit switches, dynamic microstep adjustment, and motor braking functions. The module also integrates a PWR485 communication interface (RS485 + 9-24V power input) and a DC-JACK, allowing for flexible power supply while enabling communication. It supports UIFlow graphical programming and ESP32-GRBL firmware, web control, making it easy to configure signal output for more precise control of stepper motors. This module is suitable for various stepper motor motion control scenarios, such as printers, robotic arms, etc.
Note
Precautions
Do not plug or unplug the motor while powered on. Always perform operations after powering off the device to avoid damaging the module.
Features
Three-axis HR8825 stepper motor driver
Compatible with bipolar stepper motors
Each channel has a current adjustment potentiometer, with a driving current of up to 1.5A
Supports multiple microstep modes, up to 1/32 STEP microstep
Multiple sets of signal input interfaces
PWR485 communication interface (RS485 + 9-24V power input)
DC-JACK terminal input (9-24V)
Built-in DC-DC, integrated 9-24V to 5V circuit
Development platforms:
Arduino, UIFlow
Includes
1 x Module13.2 Stepmotor Driver
4 x 2.54-2P terminals
3 x 2.54-4P terminals
1 x 3.96-4P terminal
Applications
Printers
Scanners
CNC engraving machine control
Motion module control
Specifications
Specification
Parameter
Stepper motor driver chip
HR8825
IO expansion chip
TCA9554
Supported microstep modes
FULL, 1/2, 1/4, 1/8, 1/16, 1/32
Maximum driving current per channel
1.5A
Input signal terminal spec
2.54-2P
Motor terminal spec
2.54-4P
RS485 terminal spec
3.96-4P
Net weight
40g
Gross weight
60g
Product Size
54.2 x 54.2 x 13.2mm
Package Size
95 x 65 x 25mm
Learn
Microstep Truth Table
M2
M1
M0
Resolution
0
0
0
FULL
0
0
1
1/2
0
1
0
1/4
0
1
1
1/8
1
0
0
1/16
1
0
1
1/32
1
1
0
1/32
1
1
1
1/32
TCA9554 Registers
I2C Addr: 0x27
Use register 0x00 to read status Use register 0x01 to write status Set the corresponding bit in register 0x02 to 1 for polarity inversion, 0 for no inversion Set the corresponding bit in register 0x03 to 1 for input mode, 0 for output mode. The pin correspondence for the above register bytes is shown in the table below.
Bit
Description
R/W
7
P7 Microstep adjustment bit M0
R/W
6
P6 Microstep adjustment bit M1
R/W
5
P5 Microstep adjustment bit M2
R/W
4
P4 DRV EN Driver chip enable
R/W
3
P3 Input signal 3
R/W
2
P2 Input signal 2
R/W
1
P1 Input signal 1
R/W
0
P0 Input signal 0
R/W
Driving Current Adjustment
Different stepper motors may require different driving currents. The current output can be adjusted using the metal knob on the module. To prevent motor overheating or damage, adjust the knob slowly and observe the motor status or use an ammeter to determine the appropriate driving current.
ESP32-GRBL & WEB-UI requires ESP32 board management version 1.0.3. Versions higher than this may cause compilation issues. For usage instructions and WEB-UI control, please refer to ESP32-GRBL-WIKI
