xóa dòng thừa
@@ -2,14 +2,12 @@ import time
import threading
from paho.mqtt import client as mqtt_client
broker = 'broker.emqx.io'
port = 1883
pubtop = "/boxchat/tu"
subtop = "/boxchat/tuan"
client_id = f'python-mqtt-{10}' #connect to broker
username = 'emqx'
password = 'public'
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