python - multicast send with esp8266

https://arduino-dds.tistory.com/entry/esp8266-multicast-with-python-pc

esp8266 - multicast with python pc

Code

 

import socket
 
MCAST_GRP = '224.1.1.1'
MCAST_PORT = 5123
MULTICAST_TTL = 2
 
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, MULTICAST_TTL)
 
send_str = f'python_({MCAST_PORT})\n'
sock.sendto(send_str.encode(), (MCAST_GRP, MCAST_PORT))
print(f'send_msg:{send_str}')
sock.sendto(bytes(send_str, "utf-8"), (MCAST_GRP, MCAST_PORT))
print(f'send_msg:{send_str}')
 

 

 

Result

$ python3 multicast_sendto_test.py  send_msg:python_(5123) send_msg:python_(5123)