[Solved] MQTT status feedback

[xbmcnut]

Can't seem to find this anywhere. Does ESPEasy publish a status message when a request to change a GPIO state is received? I'm running R105 on NodeMCU.

[JR01]

What is linked to the GPIO ?

If a Switch, you can let it send info, and it will come back on the MQTT channel.

[xbmcnut]

What is linked to the GPIO ?

If a Switch, you can let it send info, and it will come back on the MQTT channel.

Thanks but nope, GPIO out for relay control. I'm publishing to /ESP01/gpio/14 with 0 or 1 which flips the relay but I expect a reply back on /ESP01/status... or /ESP01/gpio/14/status. Is this a thing? Without status replies, don't know whether module got the command.

[xbmcnut]

OK. I have configured the same GPIO pin I'm using to drive a LED and controlled with

Code: Select all

/ESP/01/gpio/14

(0 or 1) as a switch. I've set the name to relay14 and the value name 1 to 'state'. Now, when I control the output with

Code: Select all

/ESP/01/gpio/14

, I get a message back if I subscribe to

Code: Select all

/ESP01/relay14/state

which is awesome.

Problem is, the published message for the switch input does not contain the 'retain' flag. So if the client disconnects and reconnects, the last know state is not read which does not make it Home Automation friendly. Anyone got a workaround or is it possible to add the retain flag to the MQTT code and recompile?

[Martinus]

The next build will have the option to globally enable the MQTT retain flag (tools/advanced menu). Off by default.
Hope this will help.

(I don't use MQTT so i'm sort of a newbie on that stuff...)

[xbmcnut]

Wow, that is awesome, thank you. That will save me much grief. I'll keep an eye out.

[Martinus]

Could you check R121 on github and verify if this solves anything?
I've only done some basic tests with the MQTT.fx tool and it seems to work.
You need to enable the retain stuff first on /tools/advanced.

[JR01]

I also use mqtt extensively, xbmcnut, could you please guve us sine more info in when tobuse this new option in R121, and when not - to 'retain' ?

[xbmcnut]

Could you check R121 on github and verify if this solves anything?
I've only done some basic tests with the MQTT.fx tool and it seems to work.
You need to enable the retain stuff first on /tools/advanced.

You Sir are a legend. It is working a treat now and has saved me countless hours of grief. Thank you so much. This makes ESPEasy super home automation friendly now.

[xbmcnut]

I also use mqtt extensively, xbmcnut, could you please guve us sine more info in when tobuse this new option in R121, and when not - to 'retain' ?

If you do not publish the 'retain' flag, when a MQTT client connects, it does not know what state the subscribed devices are in until their state changes. With it on, it checks the broker for the last know status and updates the subscription instantly. Great for home automation switches when the HA server (a.k.a MQTT client) reboots for any reason.

[JR01]

Makes sense! Tx