Home Assistant MQTT Discovery Script for Meross EM06P Smart Energy Monitor

Meross_EM06P_Home_Assistant_MQTT_Discovery.bash

#!/usr/bin/env bash
set -euo pipefail

# configuration
BROKER_HOST="${BROKER_HOST:-localhost}"
BROKER_PORT="${BROKER_PORT:-1883}"
BROKER_USER="${BROKER_USER:-}" # optional "user:pass"
PREFIX="${PREFIX:-homeassistant}"
DEVICE_NAME="${DEVICE_NAME:-Meross EM06P}" # change device name
DEVICE_ID="${DEVICE_ID:-meross-em06p-c4e7ae000000}" # change device id
STATE_TOPIC="${STATE_TOPIC:-${DEVICE_ID}/notify}"

# sensors list (field|unit|device_class|name)
SENSORS='
current|A|current|Current
voltage|V|voltage|Voltage
power|W|power|Power
pf||power_factor|Power Factor
day_energy|Wh|energy|Energy Day
month_energy|Wh|energy|Energy Month
week_energy|Wh|energy|Energy Week
year_energy|Wh|energy|Energy Year
day_ret_energy|Wh|energy|Energy returned Day
month_ret_energy|Wh|energy|Energy returned Month
week_ret_energy|Wh|energy|Energy returned Week
year_ret_energy|Wh|energy|Energy returned Year
'

# helper to publish with curl (uses curl mqtt://host/topic -d payload)
publish() {
	local topic=$1 payload=$2 url
	url="mqtt://${BROKER_HOST}:${BROKER_PORT}/${topic}"
	if [ -n "$BROKER_USER" ]; then
		curl -sS -u "$BROKER_USER" -d "$payload" "$url" >/dev/null
	else
		curl -sS -d "$payload" "$url" >/dev/null
	fi
}

for ch in 1 2 3 4 5 6; do
	printf '%s\n' "$SENSORS" | while IFS= read -r line; do
		[ -z "$line" ] && continue
		IFS='|' read -r field unit device_class name <<<"$line"
		disc_topic="${PREFIX}/sensor/${DEVICE_ID}/em${ch}_${field}/config"
		unique_id="${DEVICE_ID}_em${ch}_${field}"
		name="${DEVICE_NAME} Channel ${ch} ${name}"
		value_template="{{ value_json.params['em:${ch}'].${field} }}"
		payload="{\"name\":\"${name}\",\"unique_id\":\"${unique_id}\",\"state_topic\":\"${STATE_TOPIC}\",\"value_template\":\"${value_template}\",\"expire_after\":1800,\"device\":{\"identifiers\":[\"${DEVICE_ID}\"],\"name\":\"${DEVICE_NAME}\",\"manufacturer\":\"Meross\",\"model\":\"EM06P\"},\"device_class\":\"${device_class}\""
		[ -n "$unit" ] && payload+=",\"unit_of_measurement\":\"${unit}\""
		# disable day/week/month/year energy sensors by default
		case "$field" in
			day_*|week_*|month_*|year_*)
				payload+=",\"enabled_by_default\":false"
				;;
		esac
		payload+="}"
		publish "$disc_topic" "$payload"
		printf 'Published %s -> %s\n' "$disc_topic" "$unique_id"
	done
done