Downlink data from bridge to tag

Wireless Connectivity Ultra-Wideband
,
5

Hi there,

in order to send data via MQTT to the node, you should publish to topic

dwm/node/<node_id>/downlink/data

The format of data must be

{“data”:“ASNFZ4mrze8=”,“overwrite”:false}

Where “ASNFZ4mrze8=” is the data in base64 format.

A simple shell function to send data can look like this:

mqtt_data_pub()
{
    if [ "$#" -ne 4 ]
    then
        echo "mqtt_data_pub: missing argument"
        return 1
    fi

    ARGC=$#
    MQTT_HOST=$1
    MQTT_PORT=$2
    NODEID=$3
    MSG=$4
    MQTT_PUB=mosquitto_pub

    MSG_BASE64=`echo -n $MSG | base64`
    MSG_JSON="{\"data\":\"$MSG_BASE64\"}"

    echo $MSG_JSON | \
        $MQTT_PUB \
            -h $MQTT_HOST \
            -p $MQTT_PORT \
            -t "dwm/node/$NODEID/downlink/data" \
            -l
}

Cheers,
TDK

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