esp32组播接收程序
时间: 2023-07-03 12:27:16 浏览: 86
以下是一个ESP32组播接收程序的示例:
```C++
#include <WiFi.h>
#include <WiFiUdp.h>
const char* ssid = "YourNetworkName";
const char* password = "YourNetworkPassword";
unsigned int localPort = 8888; // 本地端口号
IPAddress multicastIP(239, 0, 0, 1); // 组播IP地址
WiFiUDP udp;
void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
if (udp.beginMulticast(WiFi.localIP(), multicastIP, localPort)) {
Serial.println("Multicast UDP started");
} else {
Serial.println("Failed to start multicast UDP");
}
}
void loop() {
int packetSize = udp.parsePacket();
if (packetSize) {
char packetBuffer[255];
udp.read(packetBuffer, packetSize);
packetBuffer[packetSize] = '\0';
Serial.print("Received multicast message: ");
Serial.println(packetBuffer);
}
}
```
此示例使用WiFiUDP库和ESP32的WiFi模块,将ESP32加入到一个组播网络中,并接收组播消息。在setup()函数中,ESP32连接到WiFi网络,并启动UDP组播。在loop()函数中,ESP32检查是否有来自组播IP地址的消息,如果有,则打印消息内容。你可以根据需要修改组播IP地址和本地端口号。