├── LED_control.ino
└── README.md


/LED_control.ino:
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  1 | /*
  2 |  Yeelink sensor client power switch example
  3 |  */
  4 | 
  5 | #include <SPI.h>
  6 | #include <Ethernet.h>
  7 | #include <Wire.h>
  8 | #include <math.h>
  9 | 
 10 | byte buff[2];
 11 | 
 12 | // for yeelink api
 13 | #define APIKEY         "dc7d1c98898fa2e4517xxxxxxxxxx" // 此处替换为你自己的API KEY
 14 | #define DEVICEID       3933 // 此处替换为你的设备编号
 15 | #define SENSORID1       5578 // 此处替换为你的传感器编号
 16 | 
 17 | 
 18 | // assign a MAC address for the ethernet controller.
 19 | byte mac[] = { 0x00, 0x1D, 0x72, 0x82, 0x35, 0x9D};
 20 | // initialize the library instance:
 21 | EthernetClient client ;
 22 | char server[] = "api.yeelink.net";   // name address for yeelink API
 23 | 
 24 | unsigned long lastConnectionTime = 0;          // last time you connected to the server, in milliseconds
 25 | boolean lastConnected = false;                 // state of the connection last time through the main loop
 26 | const unsigned long postingInterval = 3*1000; // delay between 2 datapoints, 30s
 27 | String returnValue = ""; 
 28 | boolean ResponseBegin = false;
 29 | 
 30 | void setup() {
 31 |   pinMode(5, OUTPUT);
 32 |   Wire.begin();
 33 |   // start serial port:
 34 |  Serial.begin(57600);
 35 |   
 36 |   // start the Ethernet connection with DHCP:
 37 |   if (Ethernet.begin(mac) == 0) {
 38 |     Serial.println("Failed to configure Ethernet using DHCP");
 39 |     for(;;)
 40 |       ;
 41 |   }
 42 |   else {
 43 |     Serial.println("Ethernet configuration OK");
 44 |   }
 45 | }
 46 | 
 47 | void loop() {
 48 |   // if there's incoming data from the net connection.
 49 |   // send it out the serial port.  This is for debugging
 50 |   // purposes only:
 51 | 
 52 |   if (client.available()) {
 53 |     char c = client.read();
 54 |    // Serial.print(c);
 55 |       if (c == '{')
 56 |         ResponseBegin = true;
 57 |       else if (c == '}')
 58 |         ResponseBegin = false;
 59 | 
 60 |       if (ResponseBegin)
 61 |         returnValue += c;   
 62 |   }
 63 |   if (returnValue.length() !=0 && (ResponseBegin == false))
 64 |   {
 65 |     Serial.println(returnValue);
 66 |     
 67 |     if (returnValue.charAt(returnValue.length() - 1) == '1') {
 68 |       Serial.println("turn on the LED"); 
 69 |       digitalWrite(5, HIGH);
 70 |     } 
 71 |       else if(returnValue.charAt(returnValue.length() - 1) == '0') {
 72 |       Serial.println("turn off the LED"); 
 73 |       digitalWrite(5, LOW);
 74 |     }
 75 |      returnValue = "";
 76 |   }
 77 |   // if there's no net connection, but there was one last time
 78 |   // through the loop, then stop the client:
 79 |   if (!client.connected() && lastConnected) {
 80 |     Serial.println();
 81 |     Serial.println("disconnecting.");
 82 |     client.stop();
 83 |   }
 84 |   
 85 |   // if you're not connected, and ten seconds have passed since
 86 |   // your last connection, then connect again and send data:
 87 |   if(!client.connected() && (millis() - lastConnectionTime > postingInterval)) {
 88 |     // read sensor data, replace with your code
 89 |     //int sensorReading = readLightSensor();
 90 |     Serial.print("yeelink:");
 91 |     //get data from server  
 92 |     getData();
 93 |   }
 94 |   // store the state of the connection for next time through
 95 |   // the loop:
 96 |   lastConnected = client.connected();
 97 | }
 98 | 
 99 | 
100 | 
101 | // this method makes a HTTP connection to the server and get data back
102 | void getData(void) {
103 |   // if there's a successful connection:
104 |   if (client.connect(server, 80)) {
105 |     Serial.println("connecting...");
106 |     // send the HTTP GET request:
107 |     
108 |     client.print("GET /v1.0/device/");
109 |     client.print(DEVICEID);
110 |     client.print("/sensor/");
111 |     client.print(SENSORID1);
112 |     client.print("/datapoints");
113 |     client.println(" HTTP/1.1");
114 |     client.println("Host: api.yeelink.net");
115 |     client.print("Accept: *");
116 |     client.print("/");
117 |     client.println("*");
118 |     client.print("U-ApiKey: ");
119 |     client.println(APIKEY);
120 |     client.println("Content-Length: 0");
121 |     client.println("Connection: close");
122 |     client.println();
123 |     Serial.println("print get done.");
124 |     
125 |   } 
126 |   else {
127 |     // if you couldn't make a connection:
128 |     Serial.println("connection failed");
129 |     Serial.println();
130 |     Serial.println("disconnecting.");
131 |     client.stop();
132 |   }
133 |    // note the time that the connection was made or attempted:
134 |   lastConnectionTime = millis();
135 | }
136 | 
137 |  
138 | 


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/README.md:
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1 | example_basic_1_LED
2 | ===================
3 | 


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