Linux/Mosquitto

Basic usage

• subscribe

mosquitto_sub -t "test" -h servername
mosquitto_sub -t "test" -h servername -u "username" -P "password"
mosquitto_sub -t "test" -h servername -u "username" -P "password" -p 8883 --capath /etc/ssl/certs/

• publish

mosquitto_pub -t "test" -m "test message" -h servername
mosquitto_pub -t "test" -m "test message" -h servername -u "username" -P "password"
mosquitto_pub -t "test" -m "test message" -h servername -u "username" -P "password" -p 8883 --capath /etc/ssl/certs/

User

mosquitto_passwd /etc/mosquitto/users BENUTZERNAME

Config

• get mosquitto.conf from docker container

docker cp mosquitto:/mosquitto/config/mosquitto.conf .

Simple broker

allow_anonymous true
listener 1883
persistence true
persistence_location /mosquitto/data/
log_dest file /mosquitto/log/mosquitto.log

Bridge

• Only configure on slave brokers. No special config on maste broker.
• quick reference

topic {topic pattern} direction QOS {local prefix} {remote prefix}
topic  #              in        0   
topic  edge/#         out       1
topic  #              out       2       tocloud/  fromedge/ 

• Basic 1:1 bridge

...
connection cloudvm
address 10.10.0.1:1883
try_private true
topic # out 0
topic # in 0

• only slave topics are shared

...
connection cloudvm
address 10.10.0.1:1883
try_private true
topic edge/# out 0
topic edge/# in 0

Links

• https://www.hivemq.com/blog/mqtt-essentials-part-5-mqtt-topics-best-practices
• http://www.iotsharing.com/2017/08/how-to-use-esp32-mqtts-with-mqtts-mosquitto-broker-tls-ssl.html