Cheap Yellow Display

The CYD-clone we are using at STC is as follows:

  • ESP32-WROOM-32
    • Wifi Bluetooth
    • Dual-core MCU 240MHZ processor
    • 520KB SRAM
    • 448K ROM
    • 4MB Flash storage
  • 240x320 display, 16bit colour display ILI9341
  • Resistive touchscreen XPT2046
  • Backlight control
  • Speaker circuit
  • Photosensitive circuit
  • RGB-LED
    • Red LED: Pin 4
    • Green LED: Pin 17
    • Blue LED: Pin 16
  • TF card interface
  • Temperature & humidity sensor DHT11
  • Power: 5V at 115mA
  • GPIOs available: GPIO 35, GPIO 22, GPIO 21, and GPIO 27
  • Vendor: TZT store, Aliexpress

MicroPython driver libraries

Sample setup code 

import machine
import os
from time import sleep
import stc
from ili9341 import Display, color565
from xglcd_font import XglcdFont
from xpt2046 import Touch

#########################################################
## Set up hardware - Do not make changes to this section
#########################################################

# Display and touchscreen
spi_1 = machine.SPI(1, baudrate=10000000, sck=machine.Pin(14), mosi=machine.Pin(13), miso=machine.Pin(12))
display = Display(spi_1, dc=machine.Pin(2), cs=machine.Pin(15), rst=machine.Pin(15), width=320, height=240, rotation=0)
touchscreen = Touch(spi_1, cs=machine.Pin(33), int_pin=machine.Pin(36), width=320, height=240)
# Font
unispace_font = XglcdFont('Unispace12x24.c', 12, 24)
# Backlight
backlight = machine.Pin(27, machine.Pin.OUT)
backlight.on()
# Onboard LED
red_led = machine.Pin(4, machine.Pin.OUT)
blue_led = machine.Pin(16, machine.Pin.OUT)
green_led = machine.Pin(17, machine.Pin.OUT)
red_led.on() # These LED controls are inverted :/
green_led.on()
blue_led.on()
# Color objects for TFT. Color codes are BGR
color = {}
color["white"] = color565(255, 255, 255)
color["grey"] = color565(64, 64, 64)
color["black"] = color565(0, 0, 0)
color["red"]  = color565(0, 0, 255)
color["green"]  = color565(0, 255, 0)
color["blue"]  = color565(255, 0, 0)
color["yellow"]  = color565(0, 255, 255)
color["magenta"]  = color565(255, 0, 255)
color["cyan"]  = color565(255, 255, 0)

#########################################################
## Start up code goes here
#########################################################

# Wifi networks - You may want to add your home wifi to this?
# for example: NETWORKS = [("SCWiFi","wifi1234"),("homewifi","password")]
NETWORKS = [("SCWiFi","wifi1234")]
connect_on_start = True

if __name__=="__main__":
    # Connect to wifi
    display.clear(color['black'])
    display.draw_text(0, 0, 'Connecting to wifi...', unispace_font, color['grey'], color['black'])
    ip = stc.connect_to_wifi(NETWORKS)

    # Fetch the current time
    if ip: # Only if we have a wifi connection
        display.clear(color['black'])
        display.draw_text(0, 0, 'Fetching time...', unispace_font, color['grey'], color['black'])
        stc.set_correct_time()

#########################################################
## Your main code goes here
#########################################################

if __name__=="__main__":
    display.clear(color['black'])
    display.draw_image('welcome.raw',140,0,180,240) # x, y, w, h
    display.draw_text(0, 0, 'Welcome to', unispace_font, color['cyan'], color['black'])
    display.draw_text(0, 25, 'Sha Tin College', unispace_font, color['cyan'], color['black'])
    display.draw_text(0, 50, 'Digital Design', unispace_font, color['cyan'], color['black'])
    display.draw_text(0, 100, 'TAMAGOTCHI', unispace_font, color['cyan'], color['black'])

    while True:
        green_led.on()
        sleep(0.5)
        green_led.off()
        sleep(0.5)

Copyright © Paul Baumgarten.