Arduino 物联网篇 |基于 ArduinoIDE 和ThingSpeak IoT 云平台搭建 esp8266 物

参考资料：

首先 ，构建这个项目我们需要：

arduino物联网模块（ESP8266WIFI芯片）非接触式水位检测传感器Thing Speak IOT平台免费账户IFTTT 账户

该项目的设计理念是在饮水机与水桶的结合处设置传感器，传感器监测饮水桶中的水量变化并上传数据给水厂商；当水位达到设定的阈值时，发送用户信息（地址、电话等等）给水厂商，并规划配送水路线规划。为用户省去了打电话订水这一繁琐的步骤。

方案一：基于ESP8266 WiFi芯片物联网模块设计，其中运用Thing Speak IOT免费平台采集数据，IFTTT 事件触发发送邮件到手机端。

第一步、基于ESP8266WIFI 物联网开发板模块购买指南。

Arduino物联网开发板 ESP8266 WIFI芯片非模块 OLED 可刷NodeMCU（附：此开发板 “Heltec 惠特自动化开发板”技术文档GitHub中详细介绍了开发环境配置、开发板管理、库文件下载等等）ESP8266 物联网开发模块 适用于 Arduino 编译器 物联网套件CH-3

第二步、Arduino IDE 基于Node MCU开发环境搭建。在开发板管理器中搜索 “esp8266” 会出现相应的开发板信息。

注意：这一步的时候可能会出现 “下载平台索引失败 ” ！！！

解决方案：

arduino 下载 /packages/package_index.json error 出错的解决方法

第三步、Arduino IDE 基于Node MCU库文件配置。在库管理器中 搜索 “ThingSpeak” ,下载安装第一个库。

第四步、程序测试。选择示例ThingSpeak 中的示例程序。

关键代码：主要是修改WiFi账号、密码以及ThinkSpeak 的频道ID、密钥（后面介绍）

char ssid[] = "DengHongji"; // your network SSID (name) WIFI账号//char pass[] = "denghongji123"; // your network password WIFI密码//int keyIndex = 0; // your network key Index number (needed only for WEP)WiFiClient client;unsigned long myChannelNumber = 864372;//ThingSpeak 频道号码//const char * myWriteAPIKey = "T6KJBZ0LLRV29SN1";//ThingSpeak Write API Key 密钥//

完整代码如下：

/*WriteSingleFieldDescription: Writes a value to a channel on ThingSpeak every 20 seconds.Hardware: ESP8266 based boards!!! IMPORTANT - Modify the secrets.h file for this project with your network connection and ThingSpeak channel details. !!!Note:- Requires ESP8266WiFi library and ESP8622 board add-on. See /esp8266/Arduino for details.- Select the target hardware from the Tools->Board menu- This example is written for a network using WPA encryption. For WEP or WPA, change the WiFi.begin() call accordingly.ThingSpeak ( ) is an analytic IoT platform service that allows you to aggregate, visualize, and analyze live data streams in the cloud. Visit to sign up for a free account and create a channel. Documentation for the ThingSpeak Communication Library for Arduino is in the README.md folder where the library was installed.See /help/thingspeak/index.html for the full ThingSpeak documentation.For licensing information, see the accompanying license file.Copyright , The MathWorks, Inc.*/#include "ThingSpeak.h"#include "secrets.h"#include <ESP8266WiFi.h>//char ssid[] = "CMCC-R6Qs"; // your network SSID (name) WIFI账号////char pass[] = "qmt2fx3q"; // your network password WIFI密码//char ssid[] = "DengHongji"; // your network SSID (name) WIFI账号//char pass[] = "denghongji123"; // your network password WIFI密码//int keyIndex = 0; // your network key Index number (needed only for WEP)WiFiClient client;unsigned long myChannelNumber = 864372;//ThingSpeak 频道号码//const char * myWriteAPIKey = "T6KJBZ0LLRV29SN1";//ThingSpeak Write API Key 密钥//int number = 20;void setup() {Serial.begin(9600); // Initialize serialWiFi.mode(WIFI_STA); ThingSpeak.begin(client); // Initialize ThingSpeak}void loop() {// Connect or reconnect to WiFiif(WiFi.status() != WL_CONNECTED){Serial.print("Attempting to connect to SSID: ");Serial.println(SECRET_SSID);delay(1000); while(WiFi.status() != WL_CONNECTED){WiFi.begin(ssid, pass); // Connect to WPA/WPA2 network. Change this line if using open or WEP networkSerial.print(".");delay(5000);} Serial.println("\nConnected.");}// Write to ThingSpeak. There are up to 8 fields in a channel, allowing you to store up to 8 different// pieces of information in a channel. Here, we write to field 1.int x = ThingSpeak.writeField(myChannelNumber, 1, number, myWriteAPIKey);if(x == 200){Serial.println("Channel update successful.");}else{Serial.println("Problem updating channel. HTTP error code " + String(x));}// change the valuenumber--;if(number < 10){ThingSpeak.writeField(myChannelNumber, 2, "Warning~~~", myWriteAPIKey);if(number < 1){number = 20;}}delay(1000); // Wait 20 seconds to update the channel again}

第五步、关于ThingSpeak IOT平台以及IFTTT平台的应用。

参考文章/视频：

【什么是IFTTT？】IFTTT自訂觸發條件，當發生A，則做B，讓網路自動幫你作事 - YouTube【ThingSpeak with Arduino】How to Use ThingSpeak with Arduino - YouTube【ESP8266+ThingSpeak+IFTTT】Tutorial #4 ESP8266 - Integración de IFTTT con ThingSpeak - YouTube文章：使用ESP8266和Arduino的基于物联网的患者监护系统

方案二： 此方案的优点在于软/硬件设计简单且能实现作品的部分功能。所需材料如下：

Arduino nano水位检测电路蓝牙CH-06手机APP（MIT APP Inventor）

安卓手机客户端 APP 下载链接

参考代码如下：当感应探头侦测到水桶中没有水的时候，蓝牙 函数BT.print(1)发送 信号给手机APP

/*arduino数字口引脚与蓝牙引脚连接：RX（接收）---------------9（发送）TX(发送)---------------- 8（接收）*/#include <SoftwareSerial.h>//使用软件串口，能讲数字口模拟成串口SoftwareSerial BT(8, 9); //新建对象，接收脚为8，发送脚为9char val; //存储接收的变量#define READ_PIN 13int var = 1;int var0 = 0;void setup() {Serial.begin(9600); //与电脑的串口连接pinMode(READ_PIN,INPUT);Serial.println("BT is ready!");BT.begin(9600); //设置波特率}void loop() {/*//如果串口接收到数据，就输出到蓝牙串口if (Serial.available()) {val = Serial.read();BT.print(val);}//如果接收到蓝牙模块的数据，输出到屏幕if (BT.available()) {val = BT.read();Serial.print(val);}*//*if (BT.available()) {val = BT.read();if(val == '1'){digitalWrite(led,HIGH);}if(val == '0'){digitalWrite(led,LOW);}Serial.print("massage is:");Serial.println(val);}*/Serial.println(digitalRead(READ_PIN));if(digitalRead(READ_PIN) == 1){BT.print(1); Serial.println("Send successful1!");}delay(500);}

Arduino 物联网篇 |基于 ArduinoIDE 和ThingSpeak IoT 云平台搭建 esp8266 物联网系统（附MIT APP Inventor手机客户端）

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