라즈베리파이에 아두이노 연결하고 mqtt 사용할거라 설치했다. 1. Mosquitto 설치apt install -y mosquitto mosquitto-clients2. Mosquitto 실행$ systemctl enable mosquittoSynchronizing state of mosquitto.service with SysV service script with /lib/systemd/systemd-sysv-install.Executing: /lib/systemd/systemd-sysv-install enable mosquitto$ systemctl start mosquitto$ systemctl status mosquitto● mosquitto.service - Mosquitto MQTT Broke..