本文介绍了一个基于MQTT协议的物联网项目，通过ESP8266硬件和Android Studio软件实现，详细展示了项目的代码、功能及实现过程，包括设备间的数据传输、定时任务和远程控制等功能。
title: 基于MQTT物联网项目2.0
tags: MQTT
date: 2019-01-01 20:10:00
基于MQTT物联网项目2.0
src="//player.bilibili.com/player.html?aid=39491326&cid=69360832&page=1" scrolling="no" border="0" allowfullscreen="true">看下视频效果。
- 硬件采用ESP8266制作
- 软件由android studio 开发
- 耗时3天。
- 出售价格：800元
来一波臭长臭长的代码。。。
package myself.mqtt.wenzheng.studio.mqtt;
import android.Manifest;
import android.annotation.SuppressLint;
import android.app.Notification;
import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.media.MediaRecorder;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.NotificationCompat;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.RemoteViews;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;
import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import com.mylhyl.acp.Acp;
import com.mylhyl.acp.AcpListener;
import com.mylhyl.acp.AcpOptions;
import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
import org.feezu.liuli.timeselector.TimeSelector;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import cn.bmob.v3.Bmob;
import cn.bmob.v3.BmobObject;
import org.feezu.liuli.timeselector.TimeSelector;
import cn.bmob.v3.BmobQuery;
import cn.bmob.v3.exception.BmobException;
import cn.bmob.v3.listener.QueryListener;
import cn.bmob.v3.listener.SaveListener;
import cn.bmob.v3.listener.UpdateListener;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener { //程序初始化
private String host = "tcp://60.205.203.64:1883";
//private String host = "tcp://clouddata.usr.cn:1883";
//private String userName = "wenzheng";
//private String passWord = "qqwan521";
private String userName = "admin";
private String passWord = "public";
private String messagg_val ;
private TextView t_time;
private String p ;
private String m ;
private int i = 1;
private Handler handler;
private MqttClient client;
private String timeTopic = "sensor/time";
private String wendu_Topic = "sensor/temperature_celsius";
private String shidu_Topic = "sensor/humidity";
private String shuiwei_Topic = "sensor/water";
private String work_topic = "sensor/work";
private MqttConnectOptions options;
private ScheduledExecutorService scheduler;
private TextView wendu;
private TextView shidu;
private TextView shuixiang;
private TextView text_nowtime;
private Button send_time;
private Switch sw1;
private Switch sw2;
private Switch sw3;
private Object IMEI;
@Override
protected void onCreate(Bundle savedInstanceState) { //程序启动操作
super.onCreate(savedInstanceState);
init(); //MQTT初始化
//bmob初始化
Bmob.initialize(this, "c7bb112efe55d1f43973476f5e83c6ce");
setContentView(R.layout.activity_main);
///
Acp.getInstance(this).request(new AcpOptions.Builder()
.setPermissions(Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_PHONE_STATE, Manifest.permission.SEND_SMS)
.setDeniedMessage("测试")
// .setDeniedCloseBtn()
// .setDeniedSettingBtn()
.setRationalMessage("6666")
// .setRationalBtn()
.build(),
new AcpListener() {
@Override
public void onGranted() {
//授权成功的效果
}
@Override
public void onDenied(List<String> permissions) {
makeText(permissions.toString() + "权限拒绝");
}
});
///
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if(event.getAction() == MotionEvent.ACTION_DOWN){
Toast.makeText(MainActivity.this,"按下了" ,Toast.LENGTH_SHORT).show();
// startRecord();
}else if(event.getAction() == MotionEvent.ACTION_UP){
Toast.makeText(MainActivity.this,"松开了" ,Toast.LENGTH_SHORT).show();
// stopRecord();
}
return true; //消耗掉当前事件
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
handler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
upda_time();
if (msg.what == 1) { //收到消息 并更新UI
messagg_val = (String) msg.obj;
// Toast.makeText(MainActivity.this, (String) msg.obj, Toast.LENGTH_SHORT).show();
if (messagg_val.indexOf("temperature_celsius")!= -1)
{
String regEx="[^0-9.]"; //正则表达式
Pattern p = Pattern.compile(regEx);
Matcher m = p.matcher(messagg_val);
wendu.setText(m.replaceAll("").trim());
}else if (messagg_val.indexOf("humidity")!= -1)
{
String regEx="[^0-9.]"; //正则表达式
Pattern p = Pattern.compile(regEx);
Matcher m = p.matcher(messagg_val);
shidu.setText(m.replaceAll("").trim());
}else if (messagg_val.indexOf("water")!= -1)
{
String regEx="[^0-9.]"; //正则表达式
Pattern p = Pattern.compile(regEx);
Matcher m = p.matcher(messagg_val);
shuixiang.setText(m.replaceAll("").trim());
}
} else if (msg.what == 2) {
System.out.println("连接成功");
Toast.makeText(MainActivity.this, "连接成功", Toast.LENGTH_SHORT).show();
try {
client.subscribe(timeTopic, 1);//订阅主题“mytopic”
client.subscribe(wendu_Topic,1);//订阅主题“wendu_Topic”
client.subscribe(shidu_Topic, 1);//订阅主题“shidu_Topic”
client.subscribe(shuiwei_Topic, 1);//订阅主题“shuiwei_Topic”
} catch (Exception e) {
e.printStackTrace();
}
} else if (msg.what == 3) {
Toast.makeText(MainActivity.this, "连接失败，系统正在重连", Toast.LENGTH_SHORT).show();
System.out.println("连接失败，系统正在重连");
}
}
private void upda_time() {
Date date = new Date();
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm");
String format1 = format.format(date);
text_nowtime.setText(format1);
}
};
//获取wifi服务
@SuppressLint("WifiManagerLeak")
WifiManager wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
//判断wifi是否开启
if (!wifiManager.isWifiEnabled()) {
wifiManager.setWifiEnabled(true);
}
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
int ipAddress = wifiInfo.getIpAddress();
String ip = intToIp(ipAddress); //获取ip地址
Toast.makeText(MainActivity.this, ip, Toast.LENGTH_SHORT).show();
startReconnect();
initlistener(); //设置监听
}
public static Boolean existsSdcard() {
return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED);
}
private String intToIp(int i) { // 整型转ip地址
return (i & 0xFF ) + "." +
((i >> 8 ) & 0xFF) + "." +
((i >> 16 ) & 0xFF) + "." +
( i >> 24 & 0xFF) ;
}
private void initlistener(){ //初始化监听
wendu = (TextView) findViewById(R.id.wendu);
shidu = (TextView) findViewById(R.id.shidu);
t_time = (TextView) findViewById(R.id.t_time);
shuixiang = findViewById(R.id.shuixiang);
text_nowtime = findViewById(R.id.text_nowtime);
send_time = findViewById(R.id.send_time);
sw1 = findViewById(R.id.sw1);
sw2 = findViewById(R.id.sw2);
sw3 = findViewById(R.id.sw3);
sw1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
publishmessageplus("A");
} else {
publishmessageplus("B");
}
}
});
sw2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
publishmessageplus("C");
} else {
publishmessageplus("D");
}
}
});
sw3.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
publishmessageplus("E");
} else {
publishmessageplus("F");
}
}
});
send_time.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String send_time_text = t_time.getText().toString();
if (send_time_text.contains("-"))
{
publishMessage();
}else {
Toast.makeText(MainActivity.this, "请选择定时时间", Toast.LENGTH_SHORT).show();
}
}
});
t_time.setOnClickListener(new View.OnClickListener() { //时间选择器
@Override
public void onClick(View v) {
Date date = new Date();
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String format1 = format.format(date);
TimeSelector timeSelector = new TimeSelector(MainActivity.this, new TimeSelector.ResultHandler() {
@Override
public void handle(String time) {
t_time.setText(time);
}
}, format1, "2050-1-1 24:00:00");
timeSelector.show();
}
});
}
//新建person表格式
public class Person extends BmobObject {
private String name;
private String address;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
private void startReconnect() {
scheduler = Executors.newSingleThreadScheduledExecutor();
scheduler.scheduleAtFixedRate(new Runnable() {
@Override
public void run() {
if (!client.isConnected()) {
connect();
}
}
}, 0 * 1000, 10 * 1000, TimeUnit.MILLISECONDS);
}
private void init() {
try {
//host为主机名，test为clientid即连接MQTT的客户端ID，一般以客户端唯一标识符表示，MemoryPersistence设置clientid的保存形式，默认为以内存保存
client = new MqttClient(host, "android_studio",
new MemoryPersistence());
//MQTT的连接设置
options = new MqttConnectOptions();
//设置是否清空session,这里如果设置为false表示服务器会保留客户端的连接记录，这里设置为true表示每次连接到服务器都以新的身份连接
options.setCleanSession(true);
//设置连接的用户名
options.setUserName(userName);
//设置连接的密码
options.setPassword(passWord.toCharArray());
// 设置超时时间 单位为秒
options.setConnectionTimeout(10);
// 设置会话心跳时间 单位为秒 服务器会每隔1.5*20秒的时间向客户端发送个消息判断客户端是否在线，但这个方法并没有重连的机制
options.setKeepAliveInterval(20);
//设置回调
client.setCallback(new MqttCallback() {
@Override
public void connectionLost(Throwable cause) {
//连接丢失后，一般在这里面进行重连
System.out.println("connectionLost----------");
}
@Override
public void deliveryComplete(IMqttDeliveryToken token) {
//publish后会执行到这里
System.out.println("deliveryComplete---------"
+ token.isComplete());
}
@Override
public void messageArrived(String topicName, MqttMessage message)
throws Exception {
//subscribe后得到的消息会执行到这里面
System.out.println("messageArrived----------");
Message msg = new Message();
msg.what = 1; //收到消息标志位
msg.obj = topicName + "---" + message.toString();
handler.sendMessage(msg); // hander 回传
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
private void makeText(String text) {
Toast.makeText(MainActivity.this, text, Toast.LENGTH_SHORT).show();
}
private void connect() {
new Thread(new Runnable() {
@Override
public void run() {
try {
client.connect(options);
Message msg = new Message();
msg.what = 2;
handler.sendMessage(msg);
} catch (Exception e) {
e.printStackTrace();
Message msg = new Message();
msg.what = 3;
handler.sendMessage(msg);
}
}
}).start();
}
private void publishmessageplus(String message2)
{
if (client == null || !client.isConnected()) {
return;
}
MqttMessage message = new MqttMessage();
message.setPayload(message2.getBytes());
try {
client.publish(work_topic,message);
} catch (MqttException e) {
e.printStackTrace();
}
}
private void publishMessage() { // 测试发送消息
if (client == null || !client.isConnected()) {
return;
}
MqttMessage message = new MqttMessage();
String time = t_time.getText().toString();
message.setPayload(time.getBytes());
try {
client.publish(timeTopic,message);
} catch (MqttException e) {
e.printStackTrace();
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (client != null && keyCode == KeyEvent.KEYCODE_BACK) {
try {
client.disconnect();
} catch (Exception e) {
e.printStackTrace();
}
}
return super.onKeyDown(keyCode, event);
}
@Override
protected void onDestroy() {
super.onDestroy();
try {
scheduler.shutdown();
client.disconnect();
} catch (MqttException e) {
e.printStackTrace();
}
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
///
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
Toast.makeText(MainActivity.this, "正在跳转页面", Toast.LENGTH_SHORT).show();
Intent intent = new Intent();
intent.setClass(MainActivity.this,MqttActivity.class);
this.startActivity(intent);
} else if (id == R.id.nav_gallery) {
Intent intent = new Intent();
intent.setClass(MainActivity.this,baiduActivity.class);
this.startActivity(intent);
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
硬件代码：
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <ArduinoJson.h>
#include "SSD1306Wire.h"
#include <Wire.h>
#include <PubSubClient.h>
#include "DHT.h"
#define DHTPIN 12 // what digital pin we're connected to NodeMCU (D6)
#define DHTTYPE DHT11
SSD1306Wire display(0x3c, D1, D2); // SCL & SDA
DHT dht(DHTPIN, DHTTYPE);
#define wifi_ssid "Android1"
#define wifi_password "123456987"
#define mqtt_server "60.205.203.64"
#define mqtt_user "xianyu"
#define mqtt_password "wenzheng"
#define humidity_topic "sensor/humidity"
#define temperature_celsius_topic "sensor/temperature_celsius"
#define water_topic "sensor/water"
#define time_topic "sensor/time"
#define work_topic "sensor/work"
String time_url = "http://quan.suning.com/getSysTime.do"; //时间接口地址
WiFiClient espClient;
PubSubClient client(espClient);
int open_flag = 0;
long lastMsg = 0;
int value = 0;
float h, t, f, w;
String msg ;
String payload2 = ""; //获取数据储存变量
String ding_time, nowtime, nowtime2;
char c[] = "";
void setup() {
Serial.begin(115200);
pinMode(2, OUTPUT);
pinMode(0, OUTPUT);
pinMode(14, OUTPUT);
digitalWrite(2, HIGH);
digitalWrite(0, HIGH);
digitalWrite(14, HIGH);
pinMode(A0, INPUT);
display.init();
display.flipScreenVertically();
drawFontFaceDemo(); //开机画面
dht.begin();
display.clear(); //清屏
setup_wifi();
client.setServer(mqtt_server, 1883); //链接MQTT服务器
client.setCallback(callback);//数据回调
}
void drawFontFaceDemo() {
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.setFont(ArialMT_Plain_10);
display.drawString(0, 0, "Hello MQTT");
display.setFont(ArialMT_Plain_16);
display.drawString(0, 10, "Hello MQTT");
display.setFont(ArialMT_Plain_24);
display.drawString(0, 26, "Hello MQTT");
display.display();
delay(1000);
display.clear();
}
void callback(char* topic, byte* payload, unsigned int length) //接收消息
{
Serial.print("Message arrived [");
Serial.print(topic);
Serial.print("] ");
for (int i = 0; i < length; i++) {
Serial.print((char)payload[i]);
msg = msg + (char)payload[i];
}
Serial.println(topic);
Serial.println(msg);
//消息处理 收到的数据格式为：2018-12-23 12:00
if (String(topic) == "sensor/time")
{
ding_time = msg;
open_flag = 1; // 触发指令标志位 = 1 防止多次触发。
}
if (String(topic) == "sensor/work" )
{
if (msg == "A") {
digitalWrite(2, LOW);
} else if (msg == "B") {
digitalWrite(2, HIGH);
} else if (msg == "C") {
digitalWrite(0, LOW);
} else if (msg == "D") {
digitalWrite(0, HIGH);
}else if (msg == "E") {
digitalWrite(14, LOW);
}else if (msg == "F") {
digitalWrite(14, HIGH);
}
}
msg = "";
}
String macToStr(const uint8_t* mac)
{
String result;
for (int i = 0; i < 6; ++i) {
result += String(mac[i], 16);
if (i < 5)
result += ':';
}
return result;
}
void setup_wifi() {
delay(10);
// We start by connecting to a WiFi network
Serial.println();
Serial.print("Connecting to ");
display.setFont(ArialMT_Plain_10);
display.drawString(0, 0, wifi_ssid);
display.display();
Serial.println(wifi_ssid);
WiFi.begin(wifi_ssid, wifi_password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
display.drawString(0, 10, "Wait wifi connected");
display.display();
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void reconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
String clientName;
clientName += "esp8266-";
uint8_t mac[6];
WiFi.macAddress(mac);
clientName += macToStr(mac);
clientName += "-";
clientName += String(micros() & 0xff, 16);
Serial.print("Connecting to ");
Serial.print(mqtt_server);
Serial.print(" as ");
Serial.println(clientName);
if (client.connect((char*) clientName.c_str())) {
//if (client.connect((char*) clientName.c_str()), mqtt_user, mqtt_password)) {
Serial.println("connected");
client.subscribe(time_topic);//订阅定时主题用来接收定时信息
client.subscribe(work_topic);//订阅工作主题来接收指令
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
// Wait 5 seconds before retrying
delay(5000);
}
}
}
/*********************************获取时间**************************************/
void get_time()
{
HTTPClient http;
http.begin(time_url);
int httpCode = http.GET();
if (httpCode > 0) {
payload2 = http.getString();
Serial.println(payload2);
/************************************json 数据处理********************************************/
DynamicJsonBuffer jsonBuffer;
String input = payload2;
JsonObject& root = jsonBuffer.parseObject(input);
String now_time = root[String("sysTime2")];
String now_time2 = root[String("sysTime1")]; //这是清除格式的时间 方便比较
nowtime = now_time;
// 20181225193600
nowtime2 = now_time2.substring(0, 12); //清除秒位 方便比较
}
http.end();
}
void bijiao(String a, String b)
{
String t_val = a.substring(4, 12); //清除年 方便比较
int N_T = t_val.toInt();
//Serial.println(N_T);
b.replace("-", "");
b.replace(":", "");
b.replace(" ", "");
Serial.println(b);
String d_val = b.substring(4, 12); //清除年 方便比较
int D_T = d_val.toInt();
// Serial.println(D_T);
if ((N_T >= D_T) && (D_T != 0))
{
if (open_flag)
{
Serial.println ("6666666666666");
digitalWrite(2, LOW);
open_flag = 0; // 触发指令标志位 = 0 防止多次触发。
}
}
}
void loop() {
float h = dht.readHumidity();
float t = dht.readTemperature();
float w = analogRead(A0);
// Serial.println(w);
if (w < 500) w = 500;
w = map(w, 500, 1024, 100 , 0); //映射模拟量数值为0-100%
display.setFont(ArialMT_Plain_16);
display.drawString(0, 0, "T:"); display.drawString(20, 0, String(t).c_str()); display.drawString(100, 0, "C");
display.drawString(0, 15, "H:"); display.drawString(20, 15, String(h).c_str()); display.drawString(100, 15, "%");
display.setFont(ArialMT_Plain_10);
display.drawString(0, 30, "W:"); display.drawString(20, 30, String(w).c_str()); display.drawString(100, 30, "%");
display.drawString(0, 40, "M:"); display.drawString(20, 40, ding_time);
display.drawString(0, 50, "N:"); display.drawString(20, 50, nowtime);
display.display();
if (!client.connected()) {
reconnect();
}
client.loop();
long now = millis();
if (now - lastMsg > 2000) {
lastMsg = now;
++value;
get_time();
client.publish(temperature_celsius_topic, String(t).c_str(), true); //上传温度数据
delay(100);
client.publish(humidity_topic, String(h).c_str(), true); //上传湿度数据
delay(100);
client.publish(water_topic, String(w).c_str(), true); //上传水位数据
bijiao(nowtime2, ding_time);
}
display.clear(); //显示屏清屏
}
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