【开发者笔记】MQTT python测试笔记
MQTT是基于订阅/发布的物联网协议。
python测试需要一个发送进程和接收进程，即一个发送客户端和一个接收客户端，如果这两个客户端工作在同一个topic下，那么就能进行消息互通了。
服务器用“iot.eclipse.org”就好了，避免了自己搭建服务器，然后流程还可以跑通。
发送客户端代码：
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import
paho.mqtt.client as mqtt
import
paho.mqtt.publish as publish
idx
=
0
<br>
#往paho/temperature 一直发送内容
while
True
:
print
(
"send success"
)
publish.single(
"paho/temperature"
,
payload
=
"this is message:%s"
%
idx,
hostname
=
"iot.eclipse.org"
,
client_id
=
"lora1"
,
# qos = 0,
# tls=tls,
port
=
1883
,
protocol
=
mqtt.MQTTv311)
idx
+
=
1
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接收客户端代码：
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import
paho.mqtt.client as mqtt
# The callback for when the client receives a CONNACK response from the server.
def
on_connect(client, userdata, flags, rc):
print
(
"Connected with result code "
+
str
(rc))
# The callback for when a PUBLISH message is received from the server.
def
on_message(client, userdata, msg):
#在这里处理业务逻辑
print
(msg.topic
+
" "
+
str
(msg.payload))
client
=
mqtt.Client()
client.on_connect
=
on_connect
client.on_message
=
on_message
client.connect(
"iot.eclipse.org"
,
1883
,
60
)<br>
#订阅频道
client.subscribe(
"paho/temperature"
)
# Blocking call that processes network traffic, dispatches callbacks and
# handles reconnecting.
# Other loop*() functions are available that give a threaded interface and a
# manual interface.
client.loop_forever()
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然后运行两个客户端，就可以在接收端收到消息了。
MQTT服务器不负责存储数据，需要编写额外的接收客户端来接收数据、分析、入库等。
MQTT服务器用的是iot.eclipse.org，如果碰巧两个人在用同一个频道，那可能收到别人的消息哦~
如果要搭建自己的MQTT服务器，那么回头再说。
玩一玩就好了，不要给服务器增加太多负担哟~