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ESP32-H2-DevKitM-1-N4 /CircuitPython display on 1.9" IPS LCD Module, 170x320 ST7789 SPI. Exercise Code: cpyH2_ST7789.py , color test. """ ESP32-H2-DevKitM-1-N4/CircuitPython display on 1.9" IPS LCD Module, 170x320 ST7789 SPI. ~ Color test. https://coxxect.blogspot.com/2025/11/esp32-h2-devkitm-1-n4circuitpython_21.html Connection: LCD ESP32-H2-DevKitM-1-N4 ----------------------------- GND G VCC 3V3 SCL GPIO5 SDA GPIO4 RES GPIO3 DC GPIO2 CS GPIO1 BLK GPIO0 Libraries need: adafruit_st7789.mpy adafruit_display_text folder """ import os, sys import time import board import displayio import busio import fourwire import adafruit_st7789 from adafruit_display_text import label import terminalio spi_sclk = board.IO5 spi_mosi = board.IO4 lcd_rst = board.IO3 lcd_dc = board.IO2 lcd_cs = board.IO1 lcd_bl = board.IO0 # 1.9" IPS LCD Module, 170x320 ST7789 SPI. DISPLAY_width = 320 DISPLAY_height = 170 DISPLAY_ROT ...

My dev.board: Waveshare ESP32-S3-Touch-LCD-4B Product Link:  Waveshare ESP32-S3-Touch-LCD-4B

ESP32-H2-DevKitM-1-N4 /CircuitPython display on WaveShare 3.5 inch ST7796S SPI LCD . cpyH2_ST7796.py, color test and simple text. """ ESP32-H2-DevKitM-1-N4/CircuitPython display on WaveShare 3.5 inch ST7796S SPI LCD Connection: VCC 3.3V 3V3 No Connection GND GND MISO IO3 MOSI IO5 SCLK IO4 SD_CS IO2 LCD_CS IO1 LCD_DC IO0 LCD_RST IO10 LCD_BL IO11 TP_SDA TP_SCL TP_INT TP_RST """ import os, sys import time import board import displayio import busio import fourwire import busdisplay from adafruit_display_text import label import terminalio spi_mosi = board.IO5 spi_sclk = board.IO4 sd_cs = board.IO2 lcd_cs = board.IO1 lcd_dc = board.IO0 lcd_rst = board.IO10 lcd_bl = board.IO11 DISPLAY_width = 480 DISPLAY_height = 320 ST7796_INIT_SEQUENCE = ( b"\x01\x80\x96" # _SWRESET and Delay 150ms b"\x11\x80\x78" # SLPOUT b"\x36\x01\x48" # b"\x36\x01\x08" # MADCTL ...

CircuitPython 10.0.3 code to control  ESP32-H2-DevKitM-1-N4 onboard RGB LED. import os, sys print("=========================================") print(sys.implementation[0], os.uname()[3], "\nrun on", os.uname()[4]) print("=========================================") import time import neopixel import board def cycleNeopixel(wait): for r in range(255): pixel[0] = (r, 0, 0) time.sleep(wait) for r in range(255, 0, -1): pixel[0] = (r, 0, 0) time.sleep(wait) for g in range(255): pixel[0] = (0, g, 0) time.sleep(wait) for g in range(255, 0, -1): pixel[0] = (0, g, 0) time.sleep(wait) for b in range(255): pixel[0] = (0, 0, b) time.sleep(wait) for b in range(255, 0, -1): pixel[0] = (0, 0, b) time.sleep(wait) print("to control onboard RGB NeoPixel") print("neopixel version: " + ...

Following code control the onboard RGB LED of Waveshare ESP32-H2-Zero and ESP32-H2-DevKitM-1-N4 , in Arduino framework. H2_BlinkRGB.ino /* H2_BlinkRGB */ void setup() { // No need to initialize the RGB LED } // the loop function runs over and over again forever void loop() { // * notice the color order rgbLedWrite(RGB_BUILTIN, RGB_BRIGHTNESS, 0, 0); // Red delay(1000); rgbLedWrite(RGB_BUILTIN, 0, RGB_BRIGHTNESS, 0); // Green delay(1000); rgbLedWrite(RGB_BUILTIN, 0, 0, RGB_BRIGHTNESS); // Blue delay(1000); rgbLedWrite(RGB_BUILTIN, 0, 0, 0); // Off / black delay(1000); int fade_speed = 10; for(int i=0; i<=255; i++){ rgbLedWriteOrdered(RGB_BUILTIN, LED_COLOR_ORDER_RGB, i, 0, 0); // Red delay(fade_speed); } for(int i=255; i>=0; i--){ rgbLedWriteOrdered(RGB_BUILTIN, LED_COLOR_ORDER_RGB, i, 0, 0); // Red delay(fade_speed); } for(int i=0; i<=255; i++){ rgbLedWriteOrdered(RGB_BUILTIN, LED_COLOR_ORDER_RGB, 0, i,...

 My dev.board: No brand ESP32-H2-DevKitM-1-N4 development board. Related links: ~ Espressif  ESP32-H2-DevKitM-1 Arduino Exercises: ~  Control onboard RGB LED of Waveshare ESP32-H2-Zero and ESP32-H2-DevKitM-1-N4, in Arduino framework . CircuitPython Exercises: ~  CircuitPython to control ESP32-H2-DevKitM-1-N4 onboard RGB LED ~  ESP32-H2-DevKitM-1-N4/CircuitPython display on WaveShare 3.5 inch ST7796S SPI LCD ~  ESP32-H2-DevKitM-1-N4/CircuitPython display on 1.9" IPS LCD Module, 170x320 ST7789 SPI .

 My dev. Board:  Waveshare ESP32-H2-Zero ~ Product link:  Waveshare ESP32-H2-Zero Exercises: ~  Control onboard RGB LED of Waveshare ESP32-H2-Zero and ESP32-H2-DevKitM-1-N4, in Arduino framework .