Description Module13.2 GRBL is a three-axis stepper motor driver module in the M5Stack stackable module series. It uses the ATmega328P-AU controller with three DRV8825PWPR stepper motor driver chips, enabling simultaneous control of three bipolar stepper motors. The module provides an I2C communication interface and integrates a DIP switch for motor step subdivision adjustment, up to 1/32 microstepping, and I2C address configuration. It supports dual I2C addresses 0x70 and 0x71, allowing two Module13.2 GRBL modules to be stacked for six-axis control. The power input interface supports DC 9-24V, and each motor driver channel supports up to 1.5A drive current. It also includes three sets of limit switch signal interfaces for external limit switches, using active-low motor braking control. Features ATmega328P-AU controller Three-axis DRV8825PWPR stepper motor driver Supports three bipolar stepper motors Drive current up to 1.5A per channel Maximum 1/32 microstepping I2C communication interface Supports I2C addresses 0x70 and 0x71 Stack two modules for six-axis control Limit switch interface with active-low control Specifications Specification Parameter Motor Driver Chip DRV8825PWPR Controller Chip ATmega328P-AU Communication Interface I2C communication @ 0x70, 0x71 Max Driving Current per Channel 1.5A Maximum Supported Microstepping 1/32 Interface Type XT2.54-4P Power Input DC 9-24V Product Size 54.2 x 54.2 x 13.2mm Product Weight 22.5g Package Size 95.0 x 65.0 x 25.0mm Gross Weight 42.3g Microstepping Configuration MODE2 MODE1 MODE0 Step Mode 0 0 0 Full step with 71% current 0 0 1 1/2 step 0 1 0 1/4 step 0 1 1 1/8 step 1 0 0 1/16 step 1 0 1 1/32 step 1 1 0 1/32 step 1 1 1 1/32 step Interface I2C communication interface with addresses 0x70 and 0x71 DIP switch for microstepping configuration DIP switch for I2C address configuration XT2.54-4P motor interface Three sets of limit switch signal interfaces Active-low limit switch braking control DC 9-24V power input interface Applications Printers Scanners Office automation machines Factory automation Robotics Stepper motor motion control Product List 1 x Module13.2 GRBL Resources Official Documentation Module13.2 GRBL Schematics PDF DRV8825 Datasheet GRBL v0.8 Configuration Reference Document Module13.2 GRBL Arduino Library Module13.2 GRBL UiFlow1 Documentation Module13.2 GRBL UiFlow2 Documentation FAQ What motor driver chip does Module13.2 GRBL use? It uses three DRV8825PWPR stepper motor driver chips. How many stepper motors can it control? One Module13.2 GRBL can control three bipolar stepper motors simultaneously. Can two modules be stacked for more axes? Yes. Two Module13.2 GRBL modules can be stacked to achieve six-axis control by using I2C addresses 0x70 and 0x71. What is the maximum supported microstepping? The module supports up to 1/32 microstepping. What power input range does it support? The power input interface supports DC 9-24V.
