旋转编码器、DS1302 实时时钟、红外遥控模块、雨滴探测传感器

旋转编码器、DS1302 实时时钟、红外遥控模块、雨滴探测传感器 | 配合Arduino使用案例

旋转编码器

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旋转编码器是一种用作检测自动化领域中的角度、速度、长度、位置和加速度的传感器。

有绝对式和增量式，这里使用增量式（相对）。
绝对输出只是周的当前位置，是他们成为角度传感器。增量输出关于轴的运动信息，需要进一步处理成速度、距离和位置等信息。

本案例通过左右旋转输出数值，按下清空数值。

/****** Arduino 接线 ***** Arduino   传感器* VCC       5v* GND       GND* 2        CLK   * 3        DT   * 4        SW   ***********************/int clkPin = 2;
int dtPin = 3;
int swPin = 4;void setup() {Serial.begin(9600);  // 串口通信用于输出 logpinMode(clkPin, INPUT);pinMode(dtPin, INPUT);pinMode(swPin, INPUT);digitalWrite(swPin, HIGH);
}
// 旋转就会不断变大或者变小，按下就会清零
int encoderVal = 0;
void loop() {int change = getEncoderTurn();encoderVal = encoderVal + change;if (digitalRead(swPin) == LOW) {// 按钮按下encoderVal = 0;}Serial.println(encoderVal);
}int getEncoderTurn(void) {static int oldA = HIGH;  //set the oldA as HIGHstatic int oldB = HIGH;  //set the oldB as HIGHint result = 0;int newA = digitalRead(dtPin);     //read the value of clkPin to newAint newB = digitalRead(clkPin);    //read the value of dtPin to newBif (newA != oldA || newB != oldB)  //if the value of clkPin or the dtPin has changed{if (oldA == HIGH && newA == LOW) {result = (oldB * 2 - 1);}}oldA = newA;oldB = newB;return result;
}

DS1302 实时时钟

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可为程序实现时钟功能。下面程序将会一秒钟输出一次：2023-07-27 星期四 21:28:09

开始之前需要先安装依赖

/****** Arduino 接线 ***** Arduino   传感器* VCC       3.3v* GND       GND* 5        RST   * 6        SDA/DAT   * 7        SCL/CLK   ***********************/#include <Ds1302.h>uint8_t RST_PIN = 5;
uint8_t SDA_PIN = 6;
uint8_t SCL_PIN = 7;// DS1302 RTC instance
Ds1302 rtc(RST_PIN, SCL_PIN, SDA_PIN);const static char* WeekDays[] = {"星期一","星期二","星期三","星期四","星期五","星期六","星期日"
};void setup() {Serial.begin(9600);// 初始化rtc.init();/** 设置时间 **/// 变量定义见代码底部枚举Ds1302::DateTime dt = {.year = 23,.month = Ds1302::MONTH_JUL,.day = 27,.hour = 21,.minute = 26,.second = 0,// 周.dow = Ds1302::DOW_THU};rtc.setDateTime(&dt);
}void loop() {// 获取当前时间Ds1302::DateTime now;rtc.getDateTime(&now);static uint8_t last_second = 0;if (last_second != now.second) {last_second = now.second;Serial.print("20");Serial.print(now.year);  // 00-99Serial.print('-');if (now.month < 10) Serial.print('0');Serial.print(now.month);  // 01-12Serial.print('-');if (now.day < 10) Serial.print('0');Serial.print(now.day);  // 01-31Serial.print(' ');Serial.print(WeekDays[now.dow - 1]);  // 1-7Serial.print(' ');if (now.hour < 10) Serial.print('0');Serial.print(now.hour);  // 00-23Serial.print(':');if (now.minute < 10) Serial.print('0');Serial.print(now.minute);  // 00-59Serial.print(':');if (now.second < 10) Serial.print('0');Serial.print(now.second);  // 00-59Serial.println();}delay(1000);
}//  * 月份枚举 
// enum MONTH : uint8_t {
//     MONTH_JAN = 1,
//     MONTH_FEB = 2,
//     MONTH_MAR = 3,
//     MONTH_APR = 4,
//     MONTH_MAY = 5,
//     MONTH_JUN = 6,
//     MONTH_JUL = 7,
//     MONTH_AUG = 8,
//     MONTH_SET = 9,
//     MONTH_OCT = 10,
//     MONTH_NOV = 11,
//     MONTH_DEC = 12
// };//  * 周枚举 
// enum DOW : uint8_t {
//     DOW_MON = 1,
//     DOW_TUE = 2,
//     DOW_WED = 3,
//     DOW_THU = 4,
//     DOW_FRI = 5,
//     DOW_SAT = 6,
//     DOW_SUN = 7
// };

红外遥控模块

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该模块由两部分组成：信号发射器和接收器组成。

开始之前先安装依赖

/****** Arduino 接线 ***** Arduino   传感器* VCC       5v* GND       GND* A0        D0    ***********************/#include <IRremote.h>int pin = A0;IRrecv irrecv(pin);
decode_results results;void setup() {Serial.begin(115200); IrReceiver.begin(pin);  
}void loop() {if (IrReceiver.decode()) {// IrReceiver.decodedIRData.command 每个按钮都是一个不一样的数字，根据数字判断即可Serial.println(IrReceiver.decodedIRData.command);IrReceiver.resume();  // 允许接收下一个值} 
}

雨滴探测传感器

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用来检测是否下雨，一般用于汽车的雨刷系统、只能照明和天窗系统

该模块由两部分组成：信号发射器和接收器组成。

/****** Arduino 接线 ***** Arduino   传感器* VCC       5v* GND       GND* A0        A0    雨滴越多值越小* A1        D0    达到阈值时输入低电平***********************/ int pin1 = A0;
int pin2 = A1; int pin1Val = 0;
int pin2Val = 0; void setup() {Serial.begin(9600);  pinMode(pin2, INPUT);
}void loop() { pin1Val = analogRead(pin1);pin2Val = digitalRead(pin2);Serial.print(pin1Val);  // 雨滴越多值越小Serial.print(" - "); Serial.println(pin2Val); // 达到阈值时输入低电平delay(200);
}