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how to control Yeelight

Posted on Edited on
Symbols count in article: Reading time ≈ NaN:aN

其实 Yeelight 官方描述已经足够，但是对于入门的人来说并不够详细，官方对于 Yeelight 产品的局域网控制功能在这里有说明 https://www.yeelight.com/zh_CN/developer，同样也有详细的文档。本文只是略微做一些说明。

Yeelight 产品的局域网控制分为两步

  • 发送 ssdp 消息，获取产品的信息；(这里是通过udp发送一个特定字符串，接收yeelight发回的消息，其内包含这个设备的IP地址和TCP端口)
  • 根据信息，发送控制信息。(通过上一个步骤拿到的地址和端口使用tcp连接到yeelight设备，然后通过tcp连接发送控制消息，控制消息的具体格式在官方文档中有说明)

向239.255.255.250:1982 发送一条消息

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M-SEARCH * HTTP/1.1\r\nHOST: 239.255.255.250:1982\r\nMAN: "ssdp:discover"\r\nST: wifi_bulb

在本例中，米家智能台灯会返回一下消息：

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HTTP/1.1 200 OK
Cache-Control: max-age=3600
Date:
Ext:
Location: yeelight://192.168.100.100:55443
Server: POSIX UPnP/1.0 YGLC/1
id: 0x0000000002c5343e
model: desklamp
fw_ver: 58
support: get_prop set_default set_power toggle set_ct_abx set_bright start_cf stop_cf set_scene cron_add cron_get cron_del set_adjust adjust_bright adjust_ct set_name
power: on
bright: 60
color_mode: 2
ct: 4000
rgb: 0
hue: 0
sat: 0
name:

以上信息中，”Location: yeelight://192.168.100.100:55443”是比较关键的信息，这里包含了米家智能台灯的IP地址和tcp控制端口，通过tcp连接台灯之后，向台灯发送控制消息即可。下面是一些示范。

扫描 Yeelight 设备

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#include <stdio.h>
#include <winsock2.h>
#include <WS2tcpip.h>

#pragma comment(lib, "ws2_32.lib") 

int main(int argc, char* argv[])
{
	WORD socketVersion = MAKEWORD(2, 2);
	WSADATA wsaData;
	if (WSAStartup(socketVersion, &wsaData) != 0)
	{
		return 0;
	}
	SOCKET sclient = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);

	sockaddr_in sin;
	sin.sin_family = AF_INET;
	sin.sin_port = htons(1982);
	inet_pton(AF_INET, "239.255.255.250" ,&sin.sin_addr.S_un.S_addr);
	int len = sizeof(sin);

	const char * sendData = "M-SEARCH * HTTP/1.1\r\nHOST: 239.255.255.250:1982\r\nMAN: \"ssdp:discover\"\r\nST: wifi_bulb";
	int result = sendto(sclient, sendData, strlen(sendData), 0, (sockaddr *)&sin, len);
	printf("send data size: %d\n", result);

	char recvData[1024];
	int ret = recvfrom(sclient, recvData, 1024, 0, (sockaddr *)&sin, &len);
	if (ret > 0)
	{
		recvData[ret] = 0x00;
		printf(recvData);
	}

	closesocket(sclient);
	WSACleanup();
	return 0;
}

需要注意的是，发送扫描信息需要使用udp方式，并且发送扫描信息和接收响应信息需要通过同一个sockt。

控制 Yeelight 设备

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#define _WINSOCK_DEPRECATED_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <WinSock2.h>
#pragma comment(lib, "ws2_32.lib")

#define REMOTE_IP "127.0.0.1"
#define REMOTE_PORT 8080

int main()
{
	//初始化winsock服务
	WSADATA wsaData;
	WSAStartup(MAKEWORD(2, 2), &wsaData);

	//创建socket
	SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

	struct sockaddr_in svraddr;
	svraddr.sin_family = AF_INET;
	svraddr.sin_port = htons(55443);
	svraddr.sin_addr.s_addr = inet_addr("192.168.100.100");

	//连接socket
	if (connect(sock, (struct sockaddr*)&svraddr, sizeof(svraddr)) != -1)
	{
		//发送数据给服务端
		Sleep(1000);
		
		//printf("%s", sendbuf);
		int sw = 0;
		char sendbuf1[] = "{\"id\":1,\"method\":\"set_bright\",\"params\":[100,\"smooth\",500]}\r\n";
		char sendbuf2[] = "{\"id\":1,\"method\":\"set_bright\",\"params\":[10,\"smooth\",500]}\r\n";
		char buf[1024] = { 0 };
		while (scanf("%d",&sw)!=0)
		{
			switch (sw) {
			case 1:
				
				printf("%s", sendbuf1);
				if (send(sock, sendbuf1, strlen(sendbuf1), 0) != -1)
				{
					//接收服务端数据
					//Sleep(1000);
					
					if (recv(sock, buf, 1024, 0) > 0)
					{
						printf("recv server: \r\n %s\r\n", buf);
					}
					memset(buf, 0, 1024);
				}
				break;
			case 2:
				
				printf("%s", sendbuf2);
				if (send(sock, sendbuf2, strlen(sendbuf2), 0) != -1)
				{
					//接收服务端数据
					//Sleep(1000);
					//char buf[1024] = { 0 };
					if (recv(sock, buf, 1024, 0) > 0)
					{
						printf("recv server: \n %s\n", buf);
					}
					memset(buf, 0, 1024);
				}
				break;

			}
			if (sw == 3)
				break;
		}
		
	}
	else
	{
		printf("can not connect server\n");
	}

	//关闭socket
	closesocket(sock);

	//关闭winsock服务
	WSACleanup();
	getchar();
	return 0;
}

在台灯开启的情况下，输入1或者2进行亮度调节，输入3退出。

更多更详细的控制信息可以阅读官方文档。