树莓派服务器-搭建MQTT服务器

树莓派服务器-搭建MQTT服务器

说明:

• 介绍如何在树莓派上安装Mosquitto MQTT服务器
• 环境: ubuntu 20.04

步骤:

• 默认系统已经支持,直接安装

sudo apt update -y && sudo apt install mosquitto mosquitto-clients -y

• 检查状态

sudo systemctl status mosquitto.service

• 效果如下:

$ sudo systemctl status mosquitto.service 
● mosquitto.service - Mosquitto MQTT v3.1/v3.1.1 Broker
     Loaded: loaded (/lib/systemd/system/mosquitto.service; enabled; vendor pre>
     Active: active (running) since Sat 2022-08-20 10:21:20 CST; 4min 57s ago
       Docs: man:mosquitto.conf(5)
             man:mosquitto(8)
   Main PID: 5715 (mosquitto)
      Tasks: 3 (limit: 1810)
     CGroup: /system.slice/mosquitto.service
             └─5715 /usr/sbin/mosquitto -c /etc/mosquitto/mosquitto.conf

Aug 20 10:21:20 AiWater-V101 systemd[1]: Starting Mosquitto MQTT v3.1/v3.1.1 Br>
Aug 20 10:21:20 AiWater-V101 mosquitto[5715]: [ 3635.472971]~DLT~ 5715~INFO    >
Aug 20 10:21:20 AiWater-V101 systemd[1]: Started Mosquitto MQTT v3.1/v3.1.1 Bro>

• 服务没起来,可以运行

sudo systemctl start mosquitto.service

• 停止服务,可以运行

sudo systemctl stop mosquitto.service

• 激活服务

sudo systemctl enable mosquitto

• 发布话题

mosquitto_pub -h localhost -t /home/sensors/temp/kitchen -m "Kitchen Temperature: 26°C"

• h 为主机IP, t为话题名, m为内容
• 订阅话题

mosquitto_sub -h localhost -t /home/sensors/temp/kitchen

• h 为主机, t为话题名
• 效果如下:

$ mosquitto_sub -h localhost -t /home/sensors/temp/kitchen
Kitchen Temperature: 26°C
Kitchen Temperature: 26°C
Kitchen Temperature: 26°C
Kitchen Temperature: 26°C
Kitchen Temperature: 26°C
Kitchen Temperature: 26°C

• 当发布端发布话题内容,订阅端既可显示发布的内容