【嵌入式学习3】UDP发送端、接收端

1、发送端

2、接收端

3、UDP广播

1、发送端

from socket import *udp_socket = socket(AF_INET,SOCK_DGRAM)
udp_socket.bind(("127.0.0.1",3333))data_str = "UDP发送端数据"
data_bytes = data_str.encode("utf-8")
udp_socket.sendto(data_bytes,("127.0.0.1",8080))udp_socket.close()

2、接收端

from socket import *udp_socket = socket(AF_INET, SOCK_DGRAM)# 绑定本地的相关信息，如果一个网络程序不绑定，则系统会随机分配
# ip一般不用写，表示本机的任何一个ip
udp_socket.bind(('', 8080))
print("服务器启动，等待接收数据...")
# 等待接收对方发送的数据
recv_data = udp_socket.recvfrom(1024) 
print(recv_data[0].decode('utf-8'))
print("发送方地址:", recv_data[1])udp_socket.close()

3、UDP广播

发送端

import socketdef udp_broadcast_send():# 创建 UDP 套接字udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)# 设置允许发送广播udp_socket.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, True)# 准备发送的消息send_content = "大家好，我是板烧鸡腿堡"send_data = send_content.encode("utf-8")# 指定广播地址和端口broadcast_address = ("192.168.3.255", 8080)# 发送广播消息udp_socket.sendto(send_data, broadcast_address)print(f"已发送广播消息: {send_content}")# 关闭套接字udp_socket.close()if __name__ == "__main__":udp_broadcast_send()

接收端

import socketdef udp_broadcast_receive():# 创建 UDP 套接字udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)# 绑定本地地址和端口local_address = ("", 8080)  # 空字符串表示绑定到所有可用接口udp_socket.bind(local_address)print("UDP 接收端启动，等待广播消息...")while True:# 接收广播消息recv_data, client_address = udp_socket.recvfrom(1024)print(f"收到广播消息: {recv_data.decode('utf-8')}，来自: {client_address}")# 如果需要，可以在这里添加退出条件# break# 关闭套接字udp_socket.close()if __name__ == "__main__":udp_broadcast_receive()