Using Stepper Motors with B4X

[kai25]

Hi everyone,

I'm currently experimenting with stepper motors in a B4X project and wanted to share some thoughts and ask for tips.

I'm using B4R to control a 28BYJ-48 stepper motor through an ULN2003 driver board connected to an Arduino-compatible board. Thanks to the B4X ecosystem, I can manage everything from code to interface design (using B4A/B4J) in a streamlined way.

Here's a basic setup I used in B4R:

Sub Process_Globals
Public Serial1 As Serial
Private stepper As Stepper
End Sub

Private Sub AppStart
Serial1.Initialize(115200)
Log("AppStart")

stepper.Initialize(8, 9, 10, 11) ' Pins connected to IN1-IN4 on ULN2003
stepper.Step(100) ' Rotate 100 steps
End Sub

I plan to expand this by sending commands from a B4A (Android) app to the microcontroller via Bluetooth or Wi-Fi, allowing remote control of the motor. B4XSerializator makes this integration quite straightforward.


Has anyone here done a full B4X project involving stepper motors, especially with B4R and B4A/B4J communication? I’d love to hear about your experience with:

• Power management for bigger motors (e.g., NEMA 17 or NEMA 23)
• Accuracy and missed steps
• Real-time feedback or encoder integration (if any)
• Use of external libraries with B4R for advanced motor control

Thanks in advance!

 

[Cableguy]

Please encapsulate any code with the </> tags. It will add a

 Your vode here

and make it much much easier to read

 

[Ilya G.]

You can use the wonderful ESPНome tool and control stepper from B4X via API