這是一個基於Arduino的智能燈控系統，可以實現手機遠程控制LED燈的開關，安卓客戶端在官網下載，在Yeelink官網申請好個人的開發接口把對應的參數填到裏面即可，這裏給出 硬件端使用的代碼，親測可用，如有問題可在下方評論。
#include <SPI.h> //調用通讀接口庫
#include <Ethernet.h> //調用網絡模塊庫
#include <Wire.h> //調用I2C通訊庫
#include <math.h> //調用函數庫
byte buff[2]; //定義緩衝區
float cm; //浮點型變量
char flag = 0; //定義開關循環控制變量
// for yeelink api
#define APIKEY "6d58041777974e0a50d508b********" // 替換你的 API KEY
#define DEVICEID 345302 // 替換你的device ID
String SENSORno[] = {"386996","386997","386998"}; // 把sensor ID 依次替在這裏，程序定義爲數組，幾個開關就寫幾個
//for led pin
byte ledPin[] = {A0,A1,A2}; //定義輸出的針腳A0-LED1 A2-LED2 A3-LED3
// assign a MAC address for the ethernet controller.
byte mac[] = { 0x00, 0x1D, 0x72, 0x82, 0x35, 0x9D};
// initialize the library instance:
EthernetClient client;
char server[] = "api.yeelink.net"; // name address for yeelink API
unsigned long lastConnectionTime = 0; // 初始化鏈接時間
boolean lastConnected = false; // state of the connection last time through the main loop
const unsigned long postingInterval = 3 * 1000; // delay between 2 datapoints, 3s
String returnValue = "";
boolean ResponseBegin = false;
void setup() {
for (int i = 0; i < 3; i++) //3個開關，循環次數
{
pinMode(ledPin[i], OUTPUT);
}
Wire.begin();
// start serial port:
Serial.begin(9600);
// start the Ethernet connection with DHCP:
if (Ethernet.begin(mac) == 0) {
Serial.println("Failed to configure Ethernet using DHCP");
for (;;)
;
}
else {
Serial.println("Ethernet configuration OK");
}
}
void loop() {
// if there's incoming data from the net connection.
// send it out the serial port. This is for debugging
// purposes only:
if (client.available()) {
char c = client.read();
// Serial.print(c);
if (c == '{')
ResponseBegin = true;
else if (c == '}')
ResponseBegin = false;
if (ResponseBegin)
returnValue += c;
}
if (returnValue.length() != 0 && (ResponseBegin == false))
{
Serial.println(returnValue);
if (returnValue.charAt(returnValue.length() - 1) == '1') {
Serial.println("turn on the LED");
// digitalWrite( 7, HIGH);
digitalWrite( ledPin[flag], HIGH);
}
else if (returnValue.charAt(returnValue.length() - 1) == '0') {
Serial.println("turn off the LED");
// digitalWrite(7, LOW);
digitalWrite( ledPin[flag], LOW);
}
returnValue = "";
flag ++;
}
// if there's no net connection, but there was one last time
// through the loop, then stop the client:
if (!client.connected() && lastConnected) {
Serial.println();
Serial.println("disconnecting.");
client.stop();
}
// if you're not connected, and ten seconds have passed since
// your last connection, then connect again and send data:
if (!client.connected() && (millis() - lastConnectionTime > postingInterval)) {
// read sensor data, replace with your code
//int sensorReading = readLightSensor();
Serial.print("yeelink:");
if (flag < 3) // 7改成開關數量
{
//get data from server
getData();
}
else
{
//put data to server
// postData(readData());
if (flag = 3) {
flag = 0; // 7改成開關數量
}
}
// note the time that the connection was made or attempted:
lastConnectionTime = millis();
}
// store the state of the connection for next time through
// the loop:
lastConnected = client.connected();
}
// this method makes a HTTP connection to the server and get data back
void getData(void) {
// if there's a successful connection:
if (client.connect(server, 80)) {
Serial.println("connecting...");
// send the HTTP GET request:
client.print("GET /v1.0/device/");
client.print(DEVICEID);
client.print("/sensor/");
// client.print(SENSORID);
client.print(SENSORno[flag]);
client.print("/datapoints");
client.println(" HTTP/1.1");
client.println("Host: api.yeelink.net");
client.print("Accept: *");
client.print("/");
client.println("*");
client.print("U-ApiKey: ");
client.println(APIKEY);
client.println("Content-Length: 0");
client.println("Connection: close");
client.println();
Serial.println("print get done.");
}
else
{
// if you couldn't make a connection:
Serial.println("connection failed");
Serial.println();
Serial.println("disconnecting.");
client.stop();
}
// note the time that the connection was made or attempted:
// lastConnectionTime = millis();
lastConnectionTime = millis();
}