check if the mqqt server is present

[edstobi]

Hello
I would like to equip my ESP 32 with a safety function.
I am using a WT32-eth01 with LAN and if this is not present then wifi.
Now I want to check if the mqqt server is present. If the server is not reachable because of a malfunction or newnetwork problems, all gpios which control relays, have to go into a defined position to prevent damage.
GPIO,4,1
GPIO,5,1
GPIO,14,1
GPIO,15,1

Can I make a ping request or a secure request to the MQTT server and initiate the shutdown process if this is not answered?

I am running ESP_Easy_mega_20230930_normal_ESP32_4M316k_ETH.

trying a ping I am getting
Command unknown: ping 10.10.10.10 // IP from MQTT it responds on pin from PC

[Ath]

For this purpose there are the MQTT#Connected and MQTT#Disconnected events.
When receiving the mqtt#disconnected event you can start any precautious measures needed, and revert them once the server is connected again.

[edstobi]

thank you
that sounds like the right way to go
how can i query this in a rule?
can I simply do this with:
On MQTT#Disconnected Do
GPIO,4,1
GPIO,5,1
GPIO,14,1
GPIO,15,1
Endon

I have just found the answer to this question myself in the help section.

But I do not check the differentes between MQTTimport#Disconnected and MQTT#Disconnected

[Ath]

MQTTImport#Disconnected has to do with the MQTT Import plugin P037, and is, sort of, independent from the MQTT#Disconnected event. (IMHO) you can ignore the MQTTImport events for this.

[TD-er]

mqtt#disconnected as also MQTT import uses the MQTT broker settings of the first enabled MQTT controller.

[jgrad]

there is also system variable %ismqtt%

[Ath]

there is also system variable %ismqtt%

Well, when would you check that variable? You'd have to add some repeating event to check that, so responding to the original event seems more natural and appropriate.

[jgrad]

I just wanted to add if events are not enough that related to this topic there is also system variable available....

[Ath]