EasyLoader (beta)

Current Product Don't Have Test Firmware

Note: pls, use PC chrome/edge browser, if can't connect, refresh the webpage.

1. Click connect button

2. After connected successfully, pick a firmware

3. Click the burn button

4. After burning successfully, Unplug the device and restart.


GRBL 13.2



GRBL 13.2 is a three-axis stepper motor driver module in the M5Stack stacking module series. It uses an ATmega328P-AU controller with three sets of DRV8825PWPR stepper motor driver chip control ways, which can drive three bipolar steppers at the same time.

Using the I2C communication interface (default address:0x70) and integrated DIP switch for adjusting motor step subdivision (maximum support of 1/32 step subdivision) and I2C address adjustment (support dual address adjustment 0x70, 0x71), You can achieve six-axis control by stacking two GRBL 13.2 modules.

The power input interface is DC/9-24V, the motor drive current can reach 1.5A, and three sets of limit switch signal interfaces are open, which can be used to connect an external limit switch (active low) to realize the motor braking function. Suitable for a variety of stepping motor motion control scenarios, such as printers, robotic arms, etc.

Product Features

  • ATmega328P-AU controller
  • Three-axis DRV8825PWPR stepper motor driver
  • Drive current up to 1.5A
  • Drive bipolar stepper motor
  • Maximum 1/32 mode STEP subdivision
  • Limit switch interface (active low)


  • 1x GRBL 13.2 Module


  • Printer
  • scanner
  • Office automation machine
  • Factory automation
  • robot technology


Resources Parameter
Motor driver chip DRV8825PWPR
Controller chip ATmega328P-AU
Maximum drive current of single channel 1.5A
Support maximum step subdivision 1/32
Interface XT2.54-4P
Net weight 22.5g
Gross weight 42.3g
Product size 54.2*54.2*13.2mm
Package size 95*65*25mm


EasyLoader is a concise and fast program writer, which has a built-in case program related to the product. It can be burned to the main control by simple steps to perform a series of function verification. Please install the corresponding driver according to the device type. M5Core host Please click here to view the CP210X driver installation tutorial

Download Windows Version Easyloader Download MacOS Version Easyloader

Press the button to drive the three-axis stepping motor to rotate, when the lock occurs, press the button C to unlock




Step subdivision adjustment

000Full step (2-phase excitation) with 71% current
0011/2 step (1-2 phase excitation)
0101/4 step (W1-2 phase excitation)
0111/8 step
1001/16 step
1011/32 step
1101/32 step
1111/32 step

I2C address adjustment




void Init();

//Initialize, and set the three-axis step length and acceleration.
void Init(uint32_t x_step, uint32_t y_step,uint32_t z_step,uint32_t acc);

void Gcode(char *c);

//Control x, y, z offset and motor speed
void SetMotor(int x=0, int y=0, int z=0, int speed=300);

$0=755.906 (x, step/mm)
$1=755.906 (y, step/mm)
$2=755.906 (z, step/mm)
$3=30 (step pulse, usec)
$4=500.000 (default feed, mm/min)
$5=500.000 (default seek, mm/min)
$6=28 (step port invert mask, int:00011100)
$7=25 (step idle delay, msec)
$8=50.000 (acceleration, mm/sec^2)
$9=0.050 (junction deviation, mm)
$10=0.100 (arc, mm/segment)
$11=25 (n-arc correction, int)
$12=3 (n-decimals, int)
$13=0 (report inches, bool)
$14=1 (auto start, bool)
$15=0 (invert step enable, bool)
$16=0 (hard limits, bool)
$17=0 (homing cycle, bool)
$18=0 (homing dir invert mask, int:00000000)
$19=25.000 (homing feed, mm/min)
$20=250.000 (homing seek, mm/min)
$21=100 (homing debounce, msec)
$22=1.000 (homing pull-off, mm)

'$x=value' to set parameter or just '$' to dump current settings