使用ESP8266做远程控制，总要用到服务器，个人自己搭建服务器成本太高，我们就先用已有的免费服务器做一些应用。
这段时间用ABT主板（WIFI版）连接上了贝壳物联，也试了一下他们的微信控制，还是挺好用的！
首先在贝壳物联注册账号，然后创建新设备，记录下你的设备ID和APIKEY，程序中会用到。
示例程序在贝壳物联的github上可以下载：
https://github.com/bigiot/bigiotArduino
如果已经安装了针对8266开发的Arduino IDE，我们只需要把bigiotArduino-master\libraries中的aJson文件夹拷贝到IDE的libraries下就可以了，示例工程在bigiotArduino-master\examples\ESP8266\ESP8266WIFI中的control4文件夹中。
代码编译可以能会有错误，我们来简单更改一下：
#include <ESP8266WiFi.h>
#include <aJSON.h>
//============= 此处必须修该============
String DEVICEID="1"; // 你的设备编号 ==
String APIKEY = "APIKEY"; // 设备密码==
//=======================================
unsigned long lastCheckInTime = 0; //记录上次报到时间
const unsigned long postingInterval = 40000; // 每隔40秒向服务器报到一次
const char* ssid = "ssid";//无线名称
const char* password = "password";//无线密码
const char* host = "www.bigiot.net";
const int httpPort = 8181;
void setup() {
Serial.begin(115200);
delay(1000);
WiFi.begin(ssid, password);
}
WiFiClient client;
void loop() {
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
// Use WiFiClient class to create TCP connections
if (!client.connected()) {
if (!client.connect(host, httpPort)) {
Serial.println("connection failed");
delay(5000);
return;
}
}
if(millis() - lastCheckInTime > postingInterval || lastCheckInTime==0) {
checkIn();
}
// Read all the lines of the reply from server and print them to Serial
if (client.available()) {
String inputString = client.readStringUntil('\n');
inputString.trim();
Serial.println(inputString);
int len = inputString.length()+1;
if(inputString.startsWith("{") && inputString.endsWith("}")){
char jsonString[len];
inputString.toCharArray(jsonString,len);
aJsonObject *msg = aJson.parse(jsonString);
processMessage(msg);
aJson.deleteItem(msg);
}
}
}
void processMessage(aJsonObject *msg){
aJsonObject* method = aJson.getObjectItem(msg, "M");
aJsonObject* content = aJson.getObjectItem(msg, "C");
aJsonObject* client_id = aJson.getObjectItem(msg, "ID");
if (!method) {
return;
}
String M = method->valuestring;
if(M == "say"){
String C = content->valuestring;
String F_C_ID = client_id->valuestring;
if(C == "play"){
sayToClient(F_C_ID,"Rev play!");
}else if(C == "stop"){
sayToClient(F_C_ID,"Rev stop!");
}else{
int pin = C.toInt();
sayToClient(F_C_ID,"Rev pin:"+pin);
}
}
}
void checkIn() {
String msg = "{\"M\":\"checkin\",\"ID\":\"" + DEVICEID + "\",\"K\":\"" + APIKEY + "\"}\n";
client.print(msg);
lastCheckInTime = millis();
}
void sayToClient(String client_id, String content){
String msg = "{\"M\":\"say\",\"ID\":\"" + client_id + "\",\"C\":\"" + content + "\"}\n";
client.print(msg);
lastCheckInTime = millis();
}
把上面的代码上传到ESP8266中，打开串口监视器，然后在贝壳物联页面中点击“设备遥控”，分别点击“play”按钮，点击“stop”按钮，串口监视器会显示相应的接收数据：
