ESP32 Screen

This repo contains code that uses an ESP32 Screen to show the angle and controls a stepper motor. It has a main menu to choose between the two operational modes and in each you have different controls and visuals.

Hardware and wiring

ESP Display Hardware:

• Board: ESP32-2432S028
• ESP type: ESP-WROOM-32
• Stepper: 17HS4401 (somehow the version we have in hand has an angle step of 0.45° = 360/0.45 = 800 steps/rev)
• Stepper driver: MicrostepDriver, TB6600

Wiring

ESP32-screen - Motor Driver:

• Screen: Use CN1 port (the other will not work, as GPIO35 is only input and 21 is used for backlight screen)
  • Red: Not used (3.3V)
  • Yellow: Step (GPIO 27)
  • Blue: Dir (GPIO 22)
  • Black: GND
• Motor Driver
  • EN: active_low (Should be GND)

Motor Driver - Stepper Motor:

Blue & Yellow: phase 1 Red & Green: phase 2

Development:

Custom libs

Som custom libraries has been made. Even though they are not necessarily reusable they are used to maintain a fairly short main.cpp file. These are placed in the /lib folder.

Setup using VSCode

For the first test use: this tutorial for the display and this tutorial for VSCode setup

Use the following:

• Board: upesy_wroom
• Framework: Arduino
• Update libdeps (is already added to the platformio.ini file)
• Replace the generated .pio/libdeps/uepsy_wroom/TFT_eSPI/user_setup.h with the setup_files_backup/User_Setup.h file (#define TFT_RGB_ORDER TFT_BGR and #define TFT_INVERSION_ON uncommented)

USB permission from computer

1. Test if board is recognised

   ls /dev/ttyUSB*

2. Make sure user is in dialout group

   groups
   sudo usermod -aG dialout $USER

   Log out and in to make the change

TODOs

Need:

• Displays how the angle continously is simulated and shown on the screen
• Can control a stepper motor
• Connecs inputs and stepper motor with presaved distances, simple calibration and regular control (back and forth)

Nice:

• Get angle inputs from another ESP
• Save and load configs (like the presaved motor-distances) to a SD card
• Implement inputs from outside (to adjust the angle)
• Stepper motor control with ramping up acceleration (maybe make it work with one of the stepper libraries)
• Implement SquareLine UI or LVGL to imporve UI
  • witnessmenow/ESP32-Cheap-Yellow-Display#102
  • https://randomnerdtutorials.com/lvgl-cheap-yellow-display-esp32-2432s028r/