MQTT: localhost でのテスト

Arch Linux でテストしました。

サーバーの構築

インストール

sudo pacman -S mosquitto

バージョンの確認

$ mosquitto -h
mosquitto version 2.0.20

mosquitto is an MQTT v5.0/v3.1.1/v3.1 broker.

サーバーの起動

sudo systemctl start mosquitto

Publish

go_pub_mqtt.sh

BROKER="localhost"
#
echo $BROKER
message="Hello Mqtt "`date`
mosquitto_pub -d -t orz -m "${message}" \
    -h  $BROKER \
    --topic example/testTopic

実行結果

$ ./go_pub_mqtt.sh 
localhost
Client null sending CONNECT
Client null received CONNACK (0)
Client null sending PUBLISH (d0, q0, r0, m1, 'example/testTopic', ... (53 bytes))
Client null sending DISCONNECT

Subscribe

go_sub_mqtt.sh

BROKER="localhost"
#
mosquitto_sub -d -t orz -h $BROKER \
    --topic example/testTopic

実行結果

$ ./go_sub_mqtt.sh 
Client null sending CONNECT
Client null received CONNACK (0)
Client null sending SUBSCRIBE (Mid: 1, Topic: orz, QoS: 0, Options: 0x00)
Client null sending SUBSCRIBE (Mid: 1, Topic: example/testTopic, QoS: 0, Options: 0x00)
Client null received SUBACK
Subscribed (mid: 1): 0, 0
Client null received PUBLISH (d0, q0, r0, m0, 'example/testTopic', ... (53 bytes))
Hello Mqtt 2025年  2月  4日 火曜日 16:05:35 JST