emqx4.3/examples/gateway.mqttsn.conf.example

##--------------------------------------------------------------------
## Gateway MQTT-SN
##
## Add a MQTT-SN gateway
##--------------------------------------------------------------------
## Note: This is an example of how to configure this feature
##       you should copy and paste the below data into the emqx.conf for working

gateway.mqttsn {
    broadcast = true
    enable = true
    enable_qos3 = false
    enable_stats = true
    gateway_id = 1
    idle_timeout = 30s
    mountpoint = "mqttsn2/"
    predefined = [
      {
        id = 1003
        topic = "pred/1003"
      }
    ]
}