emqx4.3/rel/config/examples/gateway.lwm2m.conf.example

## Gateway LwM2M

gateway.lwm2m {

    ## When publishing or subscribing, prefix all topics with a mountpoint string.
    ## It's a way that you can use to implement isolation of message routing between different
    ## gateway protocols
    mountpoint = "lwm2m/"

    ## The Directory for LwM2M Resource definition.
    xml_dir = "etc/lwm2m_xml/"

    ## Automatically observe the object list of REGISTER packet.
    auto_observe = false

    ## Minimum value of lifetime allowed to be set by the LwM2M client.
    lifetime_min = 1s

    ## Maximum value of lifetime allowed to be set by the LwM2M client.
    lifetime_max = 86400s

    ## The value of the time window during which the network link is considered valid by
    ## the LwM2M Gateway in QMode mode.
    qmode_time_window = 22s

    ## Topic configuration for LwM2M's gateway publishing and subscription.
    translators {
        ## The topic for receiving downstream commands.
        ## For each new LwM2M client that succeeds in going online, the gateway creates a
        ## subscription relationship to receive downstream commands and send it to the LwM2M client
        command { topic = "dn/#" }

        ## The topic for gateway to publish the notify events from LwM2M client.
        ## After succeed observe a resource of LwM2M client, Gateway will send the notify events
        ## via this topic, if the client reports any resource changes
        notify { topic = "up/notify" }

        ## The topic for gateway to publish the register events from LwM2M client.
        register { topic = "up/register" },

        ## The topic for gateway to publish the acknowledge events from LwM2M client.
        response { topic = "up/resp" },

        ## The topic for gateway to publish the update events from LwM2M client.
        update { topic = "up/resp" }
    }

    ## Policy for publishing UPDATE event message.<br/>
    ##  - always: send update events as long as the UPDATE request is received.<br/>
    ##  - contains_object_list: send update events only if the UPDATE request carries any Object List"""
    update_msg_publish_condition = always

    listeners.udp.default {
        bind = "0.0.0.0:5784"
    }
}