1_BME280

1.1_BME280+OLED_I2C_0.96(SSD1306)

安装库
Adafruit-GFX
Adafruit_SSD1306
Adafruit_Sensor
Adafruit_BME280

SSD1306引脚连接
SCL=22
SDA=21

BME280引脚连接
SCL=22
SDA=21

#include <Wire.h>
#include <Adafruit_GFX.h>     
#include <Adafruit_SSD1306.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
   
#define SEALEVELPRESSURE_HPA (1013.25)

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
 
Adafruit_BME280  bme280;

// 温度字模, 32x16px
const unsigned char str1 [] PROGMEM = {
  0x00, 0x00, 0x00, 0x80, 0x33, 0xfc, 0x00, 0x80, 0x1a, 0x04, 0x3f, 0xfe, 0x02, 0x04, 0x20, 0x00, 
  0x03, 0xfc, 0x22, 0x10, 0x42, 0x04, 0x3f, 0xfe, 0x33, 0xfc, 0x22, 0x10, 0x00, 0x00, 0x22, 0x10, 
  0x00, 0x00, 0x23, 0xf0, 0x0f, 0xfc, 0x20, 0x00, 0x16, 0x94, 0x2f, 0xfc, 0x16, 0x94, 0x22, 0x08, 
  0x36, 0x94, 0x21, 0x30, 0x26, 0x94, 0x41, 0xe0, 0x6f, 0xfe, 0x4f, 0xbc, 0x00, 0x00, 0x48, 0x06
};
// 湿度字模, 32x16px
const unsigned char str2 [] PROGMEM = {
  0x00, 0x00, 0x00, 0x80, 0x33, 0xfc, 0x00, 0x80, 0x1a, 0x04, 0x3f, 0xfe, 0x02, 0x04, 0x20, 0x00, 
  0x03, 0xfc, 0x22, 0x10, 0x62, 0x04, 0x3f, 0xfe, 0x13, 0xfc, 0x22, 0x10, 0x00, 0x00, 0x22, 0x10, 
  0x00, 0x90, 0x23, 0xf0, 0x14, 0x92, 0x20, 0x00, 0x12, 0x94, 0x2f, 0xfc, 0x32, 0x94, 0x22, 0x08, 
  0x22, 0x98, 0x21, 0x30, 0x20, 0x90, 0x41, 0xe0, 0x4f, 0xfe, 0x4f, 0xbc, 0x00, 0x00, 0x48, 0x06
};
// 气压字模, 32x16px
const unsigned char str3 [] PROGMEM = {
  0x08, 0x00, 0x00, 0x00, 0x08, 0x00, 0x3f, 0xfe, 0x1f, 0xfe, 0x20, 0x00, 0x10, 0x00, 0x20, 0x40, 
  0x30, 0x00, 0x20, 0x40, 0x2f, 0xfc, 0x20, 0x40, 0x40, 0x00, 0x20, 0xc0, 0x3f, 0xf0, 0x2f, 0xfc, 
  0x00, 0x10, 0x20, 0x40, 0x00, 0x10, 0x20, 0x50, 0x00, 0x18, 0x20, 0x48, 0x00, 0x18, 0x20, 0x4c, 
  0x00, 0x08, 0x60, 0x40, 0x00, 0x0a, 0x40, 0xc0, 0x00, 0x0e, 0x5f, 0xfe, 0x00, 0x06, 0x00, 0x00
};
// 海拔字模, 32x16px
const unsigned char str4 [] PROGMEM = {
  0x01, 0x00, 0x10, 0x00, 0x31, 0x00, 0x10, 0x88, 0x0b, 0xfe, 0x10, 0x84, 0x02, 0x00, 0x10, 0x80, 
  0x04, 0x00, 0x7f, 0xfe, 0x05, 0xfc, 0x10, 0x80, 0x63, 0x44, 0x10, 0x80, 0x02, 0x24, 0x10, 0xfc, 
  0x07, 0xfe, 0x1c, 0xc4, 0x12, 0x44, 0x70, 0xc4, 0x12, 0x44, 0x11, 0x28, 0x32, 0x24, 0x11, 0x38, 
  0x23, 0xfe, 0x11, 0x10, 0x20, 0x0c, 0x12, 0x38, 0x60, 0x08, 0x16, 0x6c, 0x00, 0x38, 0x74, 0xc2
};

void setup(void)
{
  delay(1000);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
 
  // 清除显示缓冲区
  display.clearDisplay();
 
  display.setTextSize(1);
  display.setTextColor(WHITE, BLACK);
 
  // 初始化BME280传感器
  if( bme280.begin(0x76) == 0 )
  {  // 连接错误或设备地址错误！
    display.setCursor(34, 23);
    display.print("Connection");
    display.setCursor(49, 33);
    display.print("Error");
    display.display();        // 更新显示
    while(1);                 // stay here
  }
  
 display.drawBitmap(0,0,str1,32,16,1); 
 display.drawBitmap(0,16,str2,32,16,1);
 display.drawBitmap(0,32,str3,32,16,1);
 display.drawBitmap(0,48,str4,32,16,1);
 display.display();  
}
 
char _buffer[12];
 
void loop()
{    
  //从BME280传感器读取温度,湿度,气压,海拔
  float temp = bme280.readTemperature();    // 温度
  float humi = bme280.readHumidity();       // 湿度
  float pres = bme280.readPressure();       // 气压
  float altitude =bme280.readAltitude(SEALEVELPRESSURE_HPA); //海拔
  
  // 在SSD1306上打印所有数据
  // 1: 打印温度
  if(temp < 0){
    sprintf(_buffer, "-%02u.%02u C", (int)abs(temp), (int)(abs(temp) * 100) % 100 );}
  else{
    sprintf(_buffer, "%02u.%02u C", (int)temp, (int)(temp * 100) % 100 );}
  display.setCursor(32,4);
  display.print(_buffer);
    
  // 2: 打印湿度
  sprintf(_buffer, "%02u.%02u %%", (int)humi, (int)(humi * 100) % 100 );
  display.setCursor(32,20);
  display.print(_buffer);
    
  // 3: 打印气压
  sprintf(_buffer, "%04u.%02u hPa", (int)(pres/100), (int)((uint32_t)pres % 100) );
  display.setCursor(32,36);
  display.print(_buffer);

 // 4: 打印海拔
 if(altitude < 0){
    sprintf(_buffer, "-%02u.%02u m", (int)abs(altitude), (int)(abs(altitude) * 100) % 100 );}
  else{
    sprintf(_buffer, "%02u.%02u m", (int)altitude, (int)(altitude * 100) % 100 );}
  display.setCursor(32,52);
  display.print(_buffer);
  
  // 更新显示
  display.display();
 
  delay(5000);  // 延时
 
}

2_步进电机(驱动ic：ULN2003)

安装库
Stepper

#include <Stepper.h>

#define STEPS 2038 // the number of steps in one revolution of your motor (28BYJ-48)
 
Stepper stepper(STEPS, 2, 4, 5, 15);
  
 void setup() {
 // nothing to do
}

void loop() {
stepper.setSpeed(1); // 1 rpm
stepper.step(2038); // do 2038 steps -- corresponds to one revolution in one minute
delay(1000); // wait for one second
stepper.setSpeed(6); // 6 rpm
stepper.step(-2038); // do 2038 steps in the other direction with faster speed -- corresponds to one revolution in 10 seconds
 }

3_舵机

3.1_SG90(0~180)

VCC（红线） - 5V
SIG（黄色/橙色） - 2
GND（黑色/棕色） - GND

#define COUNT_LOW 0
 #define COUNT_HIGH 8888

 #define TIMER_WIDTH 16

#include<Arduino.h>
#include "esp32-hal-ledc.h"

void setup() {
   ledcSetup(1, 50, TIMER_WIDTH); // channel 1, 50 Hz, 16-bit width
   ledcAttachPin(2, 1);   
}

void loop() {
   for (int i=COUNT_LOW ; i < COUNT_HIGH ; i=i+100)
   {
      ledcWrite(1, i);       // sweep servo 1
      delay(50);
   }
}