MQTT--Mosquitto's configuration file

Mosquitto's configuration file is stored in /etc/mosquitto/mosquitto.conf

The specific configuration content of the configuration file is:

# =================================================================
# General configuration
# =================================================================

# Client heartbeat interval
#retry_interval 20

# System status refresh time
#sys_interval 10

# Recycling time of system resources, 0 means processing as soon as possible
#store_clean_interval 10

# PID of the service process
#pid_file /var/run/mosquitto.pid

# System user of the service process
#user mosquitto

# The maximum number of concurrent client heartbeat messages
#max_inflight_messages 10

# Client heartbeat message cache queue
#max_queued_messages 100

# Used to set the expiration time of the client's long connection, the default will never expire
#persistent_client_expiration

# =================================================================
# Default listener
# =================================================================

# Service binding IP address
#bind_address

# Service binding port number
#port 1883

# Maximum number of connections allowed, -1 means no limit
#max_connections -1

# cafile: CA certificate file
# capath: CA certificate directory
# certfile: PEM certificate file
# keyfile: PEM key file
#cafile
#capath
#certfile
#keyfile

# A certificate must be provided to ensure data security
#require_certificate false

# If require_certificate is true, use_identity_as_username must also be true
#use_identity_as_username false

# Enable PSK (Pre-shared-key) support
#psk_hint

# SSL/TSL encryption algorithm, you can use the "openssl ciphers" command to obtain
# as the output of that command.
#ciphers

# =================================================================
# Persistence
# =================================================================

# Message auto-save interval
#autosave_interval 1800

# The switch of the message auto-save function
#autosave_on_changes false

# Persistence function switch
persistence true

# Persist the DB file
#persistence_file mosquitto.db

# Persistent DB file directory
#persistence_location /var/lib/mosquitto/

# =================================================================
# Logging
# =================================================================

# 4 log modes: stdout, stderr, syslog, topic
# none means no logging, this configuration can improve performance
log_dest none

# Select the level of the log (multiple items can be set)
#log_type error
#log_type warning
#log_type notice
#log_type information

# Whether to record client connection information
#connection_messages true

# Whether to record log time
#log_timestamp true

# =================================================================
# Security
# =================================================================

# Client ID prefix limit, which can be used to ensure security
#clientid_prefixes

# Allow anonymous users
#allow_anonymous true

# User/password file, default format: username:password
#password_file

# PSK format password file, default format: identity:key
#psk_file

# pattern write sensor/%u/data
# ACL permission configuration, the common syntax is as follows:
# User restrictions: user <username>
# Topic limit: topic [read|write] <topic>
# Regular limit: pattern write sensor/%u/data
#acl_file

# =================================================================
# Bridges
# =================================================================

# Allow "bridge" mode between services (can be used for distributed deployments)
#connection <name>
#address <host>[:<port>]
#topic <topic> [[[out | in | both] qos-level] local-prefix remote-prefix]

# Set the bridge client ID
#clientid

# Whether to clear the message in the remote server when the bridge is disconnected
#cleansession false

# Whether to publish bridge status information
#notifications true

# Set the topic address to which the message will be published in bridge mode
# $SYS/broker/connection/<clientid>/state
#notification_topic

# Set the bridge keepalive value
#keepalive_interval 60

# Bridge mode, there are currently three: automatic, lazy, once
#start_type automatic

# Bridge mode automatic timeout
#restart_timeout 30

# Bridge mode lazy timeout
#idle_timeout 60

# bridge client username
#username

# Bridge client password
#password

# bridge_cafile: bridge client CA certificate file
# bridge_capath: CA certificate directory of the bridge client
# bridge_certfile: bridge client's PEM certificate file
# bridge_keyfile: bridge client's PEM key file
#bridge_cafile
#bridge_capath
#bridge_certfile
#bridge_keyfile

# Your own configuration can be placed in the following directory
include_dir /etc/mosquitto/conf.d