HomeAssistant MQTT Autodiscovery for wmbusmeters

autodiscovery.sh

#!/usb/bin/env bash

# Required variables
MQTT_HOST="" # Your mqtt host
MQTT_USERNAME="" # Your mqtt username
MQTT_PASSWORD="" # Your mqtt password
METERS_FILES="" # Location of wmbusmeters.d directory

MQTT_DISCOVERY_PREFIX="homeassistant"


tmpdir="$(mktemp -d)"
echo "Using temporary folder $tmpdir for all files"

get_template_files() {
    wget -O $tmpdir/main.zip https://github.com/wmbusmeters/wmbusmeters-ha-addon/archive/refs/heads/main.zip 2> /dev/null
    unzip $tmpdir/main.zip -d $tmpdir
}

read_properties() {
  file="$1"
  while IFS="=" read -r key value; do
    case "$key" in
      "name") name="$value" ;;
      "id") id="$value" ;;
      "driver") driver="$value" ;;
    esac
  done < "$file"
}


submit_autodiscovery() {
    local name=$1
    local driver=$2
    local id=$3

    file="$tmpdir/wmbusmeters-ha-addon-main/wmbusmeters-ha-addon-edge/mqtt_discovery/${driver}.json"
    if test -f "$file"; then

        for attribute in $(jq --raw-output -c -M '. | keys[]' $file)
        do

            filter=".${attribute}.component"
            component=$(jq --raw-output -c -M $filter $file)
            if [[ ! -z "$component" ]] && [ $component != "null" ] ; then
                topic="$MQTT_DISCOVERY_PREFIX/$component/wmbusmeters/${id}_$attribute/config"

                filter=".${attribute}.discovery_payload"
                payload=$(jq --raw-output -c -M $filter $file)

                payload="${payload//\{attribute\}/${attribute}}"
                payload="${payload//\{name\}/${name}}"
                payload="${payload//\{id\}/${id}}"
                payload="${payload//\{driver\}/${driver}}"

                echo "  Add/update topic: $topic"
                mosquitto_pub -h $MQTT_HOST -u $MQTT_USERNAME -P $MQTT_PASSWORD -r -t "${topic}" -m "${payload}"
                echo $payload
            fi
        done
    else
        echo "Autodiscovery file for driver $driver not found."
    fi
}


parse_meters() {
    for meter in $METERS_FILES/*; do
        read_properties $meter

        echo "Adding Autodiscovery for meter ${name} with driver ${driver}"

        submit_autodiscovery $name $driver $id
    done
}

get_template_files
parse_meters