MartinRGB

reference:

https://www.waveshare.com/wiki/RP2040-Zero

MartinRGB

Putty

GPIO

MartinRGB

ILI9341_T4

LCD

#define PIN_SCK     13      // mandatory
#define PIN_MISO    12      // mandatory (if the display has no MISO line, set this to 255 but then VSync will be disabled)
#define PIN_MOSI 11 // mandatory

MartinRGB

reference:

http://www.lcdwiki.com/MHS-4.0inch_Display-B

• Resolution 480*320 (Pixel)
• Touch Screen Controller XPT2046
• LCD Driver IC ST7796S

MartinRGB

/**************************************************************************
  This is a library for several Adafruit displays based on ST77* drivers.

  This example works with the 1.14" TFT breakout
    ----> https://www.adafruit.com/product/4383
  The 1.3" TFT breakout

MartinRGB

reference: https://simple-circuit.com/arduino-st7789-ips-tft-display-example/

• RST pin is connected to Arduino digital pin 8,
• DC pin is connected to Arduino digital pin 9,
• SDA pin is connected to Arduino digital pin 11,
• SCL pin is connected to Arduino digital pin 13.

MartinRGB

reference:

https://www.nologo.tech/

STM32F411CEU6

MartinRGB

reference:

https://www.waveshare.com/rgb-matrix-p2.5-64x64.htm

Prepare:

comment dtparam=audio=on in /boot/config.txt

MartinRGB

#include "SevSeg.h"
SevSeg sevseg; //Initiate a seven segment controller object

// constants won't change. They're used here to set pin numbers:
const int SENSOR_PIN = A4; // the Arduino's input pin that connects to the sensor's SIGNAL pin 
const int LED_PIN = A5;
const int FAN_PIN = A0;
const int VOLTAGE_PIN = A2;
const int BUTTON_PIN = 1;
#define MQ2pin (A1)

MartinRGB

reference:

https://wiki.dfrobot.com/Analog_Voltage_Divider_SKU__DFR0051

https://components101.com/sensors/voltage-sensor-module

void setup()