read temp periodically

client.py

import time
import socket

def temp_stream():
  with socket.create_connection(("localhost", 10_123)) as sock:
    sockfd = sock.makefile("rwb", buffering=1)
    while True:
      sockfd.write(b"TEMP?\n")
      payload = sockfd.readline()
      yield float(payload)


for temp in temp_stream():
  print(f"{temp=}")
  time.sleep(1)

simulator.py

import socket
import random

with socket.create_server(("", 10_123)) as serv:
  while True:
    client, _ = serv.accept()
    clientfd = client.makefile("rwb", buffering=1)
    with client:
      while True:
        req = clientfd.readline()
        if not req:
          break
        assert req == b'TEMP?\n'
        clientfd.write(f"{random.random()*20}\n".encode())