MMM-MQTT - JSON Syntax

Hilt

Hi all

I’m trying to display MQTT data from my solar system battery logger so that a simple capacity percentage will display on the MagicMirror. I’m using the MMM-MQTT module. While the module loads up fine, it doesn’t seem to interpret the data and simply displays " Loading "

I need to retrieve a particular value within the topic. That value has a label of capacityP. The Pi running MagicMirror has a Mosquitto broker installed natively. And if I query the MQTT topic, it’s receiving data correctly. I think where I’m falling short is the syntax around retrieving the capacityP value from the topic. Any ideas ? I’ve tried so many different options. But I just can’t get it right!

	*{					
		module: 'MMM-MQTT',
		position: 'bottom_left',
		header: 'SolarMD Battery',
		config: {
			mqttServer: 'mqtt://localhost',
			port: '1883',
			label: 'Charge Level',
			decimals: 1,
			topic: 'solarmd/energy/outputEnergy/bank1',
			jsonpointer: '{"solarmd": {"energy": {"outputEnergy": {"bank1": {"capacityP"}}}}}',
			suffix: '%'*

MM Screenshot.png
MQTT Explorer Screenshot.png

mumblebaj

@Hilt If you are using this MMM-MQTT module then your config does not look correct to me. Double check your config.

{
    module: 'MMM-MQTT',
    position: 'bottom_left',
    header: 'MQTT',
    config: {
        mqttServers: [ 
            //serverdetails goes here
            subscriptions[{
                    topic: "",
                    label: "",
                    ...
                }
            ],
        ]
    }
}

Hilt

@mumblebaj

Thanks so much for the response. That syntax/config was the latest version ( of sooo many ) I tried where I just couldn’t get it to work

I have since taken another route. I’m running Home Assistant and MQTT Docker containers on a Synology NAS. Home Assistant displays the info I need via a simple custom dashboard. I then use an iFrame on the Magic Mirror to display said data. Works a treat