1.MQ-2烟雾传感器的使用
#include
#define Sensor_AO A0
#define Sensor_DO 4
unsigned int sensorValue = 0;
void setup()
{
pinMode(Sensor_DO, INPUT);
Serial.begin(9600);
}
void loop()
{
sensorValue = analogRead(Sensor_AO);// 读取传感器的模拟值并赋值给val,函数的返回值范围是0 到1023
Serial.print("Sensor AD Value = ");
Serial.println(sensorValue);
if (digitalRead(Sensor_DO) == LOW)
{
Serial.println("Alarm!");
}
delay(1000);
}
2.ardunio对JSON解析
#include //jSON
String comdata;
void setup()
{
Serial.begin(115200);
}
void loop()
{
while (Serial.available() > 0){
comdata += char(Serial.read()); //每次读一个char字符，并相加
delay(2);
}
if (comdata.length() > 0){
DynamicJsonDocument jsonBuffer(200);
DeserializationError error =deserializeJson(jsonBuffer,comdata);
Serial.println(comdata);
if (error) {
// Serial.println(comdata);
return;
}else{
if(jsonBuffer["deviceType"]=="RFID" || jsonBuffer["deviceType"]=="addRFID"){
Serial.println(comdata);
}
}
comdata="";
}
}
3.使用温湿度传感器dht11
#include
//定义针脚
#define DHTPIN 5
//定义类型，DHT11或者其它
#define DHTTYPE DHT11
//进行初始设置
DHT dht(DHTPIN, DHTTYPE);
void setup() {
Serial.begin(115200);
dht.begin(); //DHT开始工作
}
void loop() {
// 两次检测之间，要等几秒钟，这个传感器有点慢。
delay(2000);
// 读温度或湿度要用250毫秒
int h = dht.readHumidity();//读湿度
int t = dht.readTemperature();//读温度，默认为摄氏度
Serial.print("Humidity: ");//湿度
Serial.println(h);
Serial.print("Temperature: ");//温度
Serial.print(t);
Serial.println(" ℃ ");
}
4.使用co2传感器ccs811
#include
Adafruit_CCS811 ccs;
void setup() {
Serial.begin(115200);
ccs.begin();
Serial.println("CCS811 test");
if(!ccs.begin()){
Serial.println("Couldn’t find sensor!");
}
while(!ccs.available());
}
void loop() {
if(ccs.available()){
if(!ccs.readData()){
Serial.print("CO2: ");
Serial.println(ccs.geteCO2());
Serial.print(" TVOC: ");
Serial.println(ccs.getTVOC());
}else{
Serial.println("ERROR!");
}
}
delay(500);
}
5.使用的是0.96寸的四脚OLED，芯片为ESP-WROOM-32。
#include
U8G2_SSD1306_128X64_NONAME_1_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);
void setup(void) {
u8g2.begin();
}
void loop(void) {
u8g2.setFont(u8g2_font_ncenB10_tr);
u8g2.setFontDirection(0);
u8g2.firstPage();
do {
u8g2.setCursor(0, 15);
u8g2.print("Hello World!");
} while ( u8g2.nextPage());
delay(1000);
}
6.使用风扇
//A
const int AA=8;
const int AB=9;
//B
const int BA=6;
const int BB=7;
//byte speed=255;
String comdata = "";
void setup() {
Serial.begin(115200);
pinMode(AA,OUTPUT);
pinMode(AB,OUTPUT);
pinMode(BA,OUTPUT);
pinMode(BB,OUTPUT);
}
void loop() {
while (Serial.available() > 0){
comdata += char(Serial.read()); //每次读一个char字符，并相加
delay(2);
}
if (comdata.length() > 0){
//Serial.print(comdata);
if(comdata=="1z")
{//电机风扇正转
digitalWrite(AA,HIGH);
digitalWrite(AB,LOW);
}
if(comdata=="1f"){
digitalWrite(AA,LOW);
digitalWrite(AB,HIGH);
}
if(comdata=="1t"){
digitalWrite(AA,LOW);
digitalWrite(AB,LOW);
}
if(comdata=="2z")
{//电机风扇正转
digitalWrite(BA,HIGH);
digitalWrite(BB,LOW);
}
if(comdata=="2f"){
digitalWrite(BA,LOW);
digitalWrite(BB,HIGH);
}
if(comdata=="2t"){
digitalWrite(BA,LOW);
digitalWrite(BB,LOW);
}
comdata = "";
}
}
7.使用光照传感器
#include //IIC库
#include
//VCC，GND，SCL，SDA和ADDR。五个引脚分别接上Arduino UNO的3.3V，GND，A5与A4接口，ADDR引脚悬空不接。
int BH1750address = 0x23;//芯片地址为16位23
byte buff[2];
void setup(){
pinMode(13,OUTPUT);
Wire.begin();
Serial.begin(9600);
}
void loop(){
int i;
uint16_t val=0;
BH1750_Init(BH1750address);
delay(100);
if(2==BH1750_Read(BH1750address)) {
val=((buff[0]<<8)|buff[1])/1.2;
Serial.print(val,DEC);
Serial.println("[lx]");
}
delay(150);
if (val<100) {
digitalWrite(13,HIGH);
}
else {
digitalWrite(13,LOW);
}
}
int BH1750_Read(int address) {
int i=0;
Wire.beginTransmission(address);
Wire.requestFrom(address, 2);
while(Wire.available()) {
buff[i] = Wire.read(); // read one byte
i++;
}
Wire.endTransmission();
return i;
}
void BH1750_Init(int address) {
Wire.beginTransmission(address);
Wire.write(0x10);//1lx reolution 120ms
Wire.endTransmission();
}
8.利用EEPROM实现控制存储
#include
#include
int a;
int value;
String comdata;
void setup()
{
Serial.begin(115200);
//EEPROM.write(0,12);
}
void loop()
{
value = EEPROM.read(0);
Serial.println(value);
while (Serial.available() > 0)
{
comdata+= char(Serial.read());
}
if(comdata.length() > 0){
DynamicJsonDocument jsonBuffer(200); //解析json
// 反序列化JSON
DeserializationError error =deserializeJson(jsonBuffer,comdata);
if(error){
Serial.println(comdata);
}else{
if(jsonBuffer["deviceType"]=="B"){
a=jsonBuffer["mesValue"];
EEPROM.write(0,a);
delay(3);
}
}
comdata="";
}
delay(1500);
}
9.使用JSON来控制RFID进行写入和读取
#include
#include
#include
#include
typedef struct{
byte bookId[32];
byte bookName[64];
byte bookLocation[64];
}Library;
#define pinBuzzer 4
#define RST_PIN 9 // Configurable, see typical pin layout above
#define SS_PIN 10 // Configurable, see typical pin layout above
MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance
MFRC522::MIFARE_Key key;
MFRC522::StatusCode status;
Library library; //实例化一个结构体变量
byte block;
byte len;
String comdata;
String bookId;
String bookName;
String bookLocation;
const int bookNameBlockAddr[3] = {48,28,30}; //名称的存储地址
void setup() {
Serial.begin(115200); // Initialize serial communications with the PC
SPI.begin(); // Init SPI bus
mfrc522.PCD_Init(); // Init MFRC522 card
for (byte i = 0; i < 6; i++) key.keyByte[i] = 0xFF;
}
void loop(){
while (Serial.available() > 0){
comdata = Serial.readString();
}
if (comdata.length() > 0){
if(comdata=="1")
{
// 寻找新卡
while ( ! mfrc522.PICC_IsNewCardPresent())
{
delay(1000);
}
// 选择一张卡
if ( ! mfrc522.PICC_ReadCardSerial()) {
return;
}
// mfrc522.PICC_DumpDetailsToSerial(&(mfrc522.uid)); //转储有关卡的一些详细信息
len = 18;
for(int i = 0; i < 3;i++)
{
//在uid为mfrc522.uid的卡的trailerBlock块（此块为扇区控制块）验证key是否与A密码相同
status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, bookNameBlockAddr[i], &key, &(mfrc522.uid));
if (status != MFRC522::STATUS_OK) {
break;
}
//读取len个第bookNameBlockAddr[i]块的数据到library.bookId[i*16]
if(i==0){
status = mfrc522.MIFARE_Read(bookNameBlockAddr[i], &library.bookId[32], &len);
}else if(i==1){
status = mfrc522.MIFARE_Read(bookNameBlockAddr[i], &library.bookName[64], &len);
}else{
status = mfrc522.MIFARE_Read(bookNameBlockAddr[i], &library.bookLocation[64], &len);
}
if (status != MFRC522::STATUS_OK) {
break;
}
}
//发送读到的数据给串口
for (uint8_t i = 0; i < sizeof(library.bookId)&& library.bookId[i]; i++)
{
bookId+=char(library.bookId[i]);
}
for (uint8_t i = 0; i < sizeof(library.bookName) && library.bookName[i]; i++)
{
bookName+=char(library.bookName[i]);
}
for (uint8_t i = 0; i < sizeof(library.bookLocation) && library.bookLocation[i]; i++)
{
bookLocation+=char(library.bookLocation[i]);
}
//此处将三个数据用json格式发送 =====================
Serial.print("{\"deviceType\":\"bookRFID\",\"bookId\":\""+bookId+"\"");
//Serial.print(bookId);
//Serial.print("1");
Serial.print(",\"bookName\":\""+bookName+"\"");
// Serial.print(bookName);
// Serial.print(",\"bookLocation\":");
//Serial.print(bookLocation);
Serial.print(",\"bookLocation\":\""+bookLocation+"\"");
Serial.println("}");
//蜂鸣器发出声音1s可以用delay
digitalWrite(pinBuzzer, HIGH); //有障碍时
delay(50);
digitalWrite(pinBuzzer,LOW);
mfrc522.PICC_HaltA();
mfrc522.PCD_StopCrypto1();
bookId="";
bookName="";
bookLocation="";
}
//写标签
else if(comdata=="2")
{
// 寻找一张新卡
while( ! mfrc522.PICC_IsNewCardPresent())
{
delay(1000);
}
// 选择一张卡
if ( ! mfrc522.PICC_ReadCardSerial()) {
return;
}
String mes1="meilinsen";
String mes2="meilinsen";
String mes3="meilinsen";
if(mes1){
mes1.getBytes(library.bookId,-1);
mes2.getBytes(library.bookName,-1);
mes3.getBytes(library.bookLocation,-1);
}
for(int i = 0; i < 3; i++)
{
status = mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, bookNameBlockAddr[i], &key, &(mfrc522.uid));
if (status != MFRC522::STATUS_OK) {
break;
}
// Write block
if(i==0){
status = mfrc522.MIFARE_Write(bookNameBlockAddr[i], &library.bookId[32], 16);
}
else if(i==1){
status = mfrc522.MIFARE_Write(bookNameBlockAddr[i], &library.bookName[64], 16);
}else{
status = mfrc522.MIFARE_Write(bookNameBlockAddr[i], &library.bookLocation[64], 16);
}
if (status != MFRC522::STATUS_OK) {
break;
}
}
//蜂鸣器发出声音1s可以用delay
digitalWrite(pinBuzzer, HIGH); //有障碍时
delay(50);
digitalWrite(pinBuzzer,LOW);
//================================
mfrc522.PICC_HaltA(); // 使放置在读卡区的IC卡进入休眠状态，不再重复读卡，Halt(停止)
mfrc522.PCD_StopCrypto1(); // 停止读卡模块编码
}
}
comdata = "";
}
10.（综合）使用JSON来控制步进电机和风扇正反转，使用红外对射，LED灯，EEPROM存储等
#include
#include
#include //存储
#include
#include
const byte IRPin = 12; //红外对射，管脚D12
const byte ledPin = 7; //LED，管脚D9
int pinBuzzer = 6; //蜂鸣器，管脚D5
//A
const int AA=2;
const int AB=3;
//B
const int BA=4;
const int BB=5;
//byte speed=255;
String comdata = "";
//红外对射
int flag=0;
//状态:0表示自动,1表示手动
int type=0;
//温度值和阈值
int t;
int t1;
int t2;
//光照
int l;
int L1;
// 定义电机控制用常量
int d=1;
// 电机内部输出轴旋转一周步数
const int STEPS_PER_ROTOR_REV = 32;
// 减速比
const int GEAR_REDUCTION = 64;
const float STEPS_PER_OUT_REV = STEPS_PER_ROTOR_REV * GEAR_REDUCTION;
Stepper steppermotor(STEPS_PER_ROTOR_REV, 8, 10, 9, 11);
int StepsRequired;
void sendMes(){
Serial.print("{\"myName\":\"XiaoLiTongXue\",\"deviceType\":\"B\",\"flag\":");
Serial.print(flag);
Serial.println("}");
}
void autoController(){//自动控制
if(type==0){
if(t>=t1){//风扇1打开
digitalWrite(AA,LOW);
digitalWrite(AB,HIGH);
}else{//风扇1关闭
digitalWrite(AA,LOW);
digitalWrite(AB,LOW);
}
if(t>=t2){//风扇都打开
digitalWrite(BA,LOW);
digitalWrite(BB,HIGH);
}else{//风扇关闭
digitalWrite(BA,LOW);
digitalWrite(BB,LOW);
}
if(lL1 && d==0){//步进电机反转5秒
StepsRequired = - STEPS_PER_OUT_REV;
steppermotor.setSpeed(400);
steppermotor.step(StepsRequired);
d=1;
digitalWrite(ledPin, LOW); //设置LED灯
}
}
}
void setup() {
Serial.begin(115200);
pinMode(AA,OUTPUT);
pinMode(AB,OUTPUT);
pinMode(BA,OUTPUT);
pinMode(BB,OUTPUT);
pinMode(IRPin, INPUT); //红外对射开关
pinMode(ledPin, OUTPUT); //LED端口设定成“输出”
pinMode(pinBuzzer,OUTPUT); //设置pinBuzzer脚为输出状态
digitalWrite(pinBuzzer,LOW);//设置蜂鸣器灯初始状态为0
digitalWrite(ledPin, LOW); //设置LED灯初始状态为0
MsTimer2::set(1000,sendMes);
MsTimer2::start();
}
void loop() {
t1=EEPROM.read(0);
t2=EEPROM.read(1);
L1=EEPROM.read(2);
while (Serial.available() > 0){
comdata += char(Serial.read()); //每次读一个char字符，并相加
delay(2);
//Serial.print(comdata);
}
if (comdata.length() > 0){
DynamicJsonDocument jsonBuffer(200); //解析json
// 反序列化JSON
DeserializationError error =deserializeJson(jsonBuffer,comdata);
//delay(20);
if (error) {
Serial.println(comdata);
return;
}
else{
//Serial.println(comdata);
if(jsonBuffer["deviceType"]=="autoController"){
type=0;
d=0;
}
if(jsonBuffer["deviceType"]=="quitController"){
type=1;
}
if(jsonBuffer["deviceType"]=="A"){//得到温度值
t=jsonBuffer["temperature"];
l=jsonBuffer["luminosity"];
}
if(type==1){//手动
if(jsonBuffer["mesValue"]=="df"){//步进电机正转
// 顺时针一次旋转
StepsRequired = STEPS_PER_OUT_REV;
steppermotor.setSpeed(1000);
steppermotor.step(StepsRequired);
}
if(jsonBuffer["mesValue"]=="dz"){//步进电机反转
// 逆时针一次旋转
StepsRequired = - STEPS_PER_OUT_REV;
steppermotor.setSpeed(1000);
steppermotor.step(StepsRequired);
}
if(jsonBuffer["mesValue"]=="1z"){//电机风扇正转
digitalWrite(AA,HIGH);
digitalWrite(AB,LOW);
}
if(jsonBuffer["mesValue"]=="1f"){
digitalWrite(AA,LOW);
digitalWrite(AB,HIGH);
}
if(jsonBuffer["mesValue"]=="1t"){
digitalWrite(AA,LOW);
digitalWrite(AB,LOW);
}
if(jsonBuffer["mesValue"]=="2z"){//电机风扇正转
digitalWrite(BA,HIGH);
digitalWrite(BB,LOW);
}
if(jsonBuffer["mesValue"]=="2f"){
digitalWrite(BA,LOW);
digitalWrite(BB,HIGH);
}
if(jsonBuffer["mesValue"]=="2t"){
digitalWrite(BA,LOW);
digitalWrite(BB,LOW);
}
if(jsonBuffer["mesValue"]=="open"){
digitalWrite(ledPin, HIGH);
}
if(jsonBuffer["mesValue"]=="close"){
digitalWrite(ledPin, LOW);
}
}
else{
if(jsonBuffer["deviceType"]=="setT1"){//设置温度阈值1
t1=jsonBuffer["mesValue"];
EEPROM.write(0,t1);
delay(5);
}
if(jsonBuffer["deviceType"]=="setT2"){
t2=jsonBuffer["mesValue"];
EEPROM.write(1,t2);
delay(5);
}
if(jsonBuffer["deviceType"]=="setL1"){
L1=jsonBuffer["mesValue"];
d=0;
EEPROM.write(2,L1);
delay(5);
}
}
}
comdata = "";
}
//自动
autoController();
//红外设备断开，蜂鸣器响，LED灯闪烁8秒
boolean IR = digitalRead(IRPin); //要不要放函数前面
if (IR) {
digitalWrite(pinBuzzer, LOW); //没有阻拦时
digitalWrite(ledPin, LOW);
flag=0;
} else {
flag=1;
digitalWrite(pinBuzzer, HIGH); //有障碍时
//digitalWrite(ledPin, HIGH); //设置LED灯
//delay(3000);
}
}
