使用Arduino制做变色温湿度计 中等

材料：Arduino UNO主控板,RGB Matrix点阵,DHT11温湿度传感器，杜邦线若干

代码：

/*!

 * @file testRGBMatrix.ino

 * @brief Run the routine to test the RGB LED Matrix Panel

 * @copyright   Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)

 * @license     The MIT License (MIT)

 * @author [TangJie]](jie.tang@dfrobot.com)

 * @version  V1.0.1

 * @date  2022-03-23

 * @url https://github.com/DFRobot/DFRobot_RGBMatrix

 */

#include

#include

#define data 4

#define code 11

#define OE    9

#define LAT   10

#define CLK   11

#define A     A0

#define B     A1

#define C     A2

#define D     A3

#define E     A4

#define WIDTH 64

#define _HIGH 128

DFRobot_RGBMatrix matrix(A, B, C, D, E, CLK, LAT, OE, false, WIDTH, _HIGH);

DHT dht2(data,code);

void temp(float item, float trem) {  // Use parentheses () instead of colon :

  if (item < 16) {

    matrix.setTextColor(matrix.Color333(0, 0, 255));

    matrix.setCursor(12, 20);

    matrix.print(item);

  }

  else if (item < 30) {

    matrix.setTextColor(matrix.Color333(0, 255, 0));

    matrix.setCursor(12, 20);

    matrix.print(item);

  }

  else {

    matrix.setTextColor(matrix.Color333(255, 0, 0));

    matrix.setCursor(12, 20);

    matrix.print(item);

  }

  if (trem >80) {

    matrix.setTextColor(matrix.Color333(255, 0, 0));

    matrix.setCursor(12, 40);

    matrix.print(item);  // Note: You're printing 'item' here, should it be 'trem'?

  }

  else if (trem >30) {

    matrix.setTextColor(matrix.Color333(0, 255, 0));

    matrix.setCursor(12, 40);

    matrix.print(item);  // Note: You're printing 'item' here, should it be 'trem'?

  }

  else {

    matrix.setTextColor(matrix.Color333(0, 0, 255));

    matrix.setCursor(12, 40);

    matrix.print(trem);

  }

  matrix.setCursor(12, 50);

  matrix.print('C');

  matrix.setCursor(12, 30);

  matrix.print('%');

  delay(1000);

  matrix.fillScreen(0);

}

void setup() {

  matrix.begin();

  dht2.begin();

}

void loop() {

  temp(dht2.readTemperature(),dht2.readHumidity());

}

注意：RGBMatrix点阵需要5V3A+电源。