CO2 MH-Z19 sensor sends U = 0 via mqtt

[micropet]

The MH-Z19 sensor transmits over mqtt always "U = 0.00". The line with the "U" can not be removed either.

14:26:35 ESP-206/PPM 594.00 14:26:35 ESP-206/MHZ19Temp 22.20 14:26:35 ESP-206/U 0.00

[TD-er]

This "U" value used to be of some meaning for the A-version of the sensor. It used to be some indication for the lowest raw internal measured value which would be used in the ABC of the sensor. Is it a problem to leave it?

[micropet]

No, no problem. I just thought useless.

0.00 is always displayed on all my devices. Would be fine if I can suppress the sending of this value. With 20 devices sending U = 0.00 every 30 seconds, there is unnecessary traffic.

[Grovkillen]

Well, subscribe to "$SYS/#" and you'll see that those 20 devices sending U is really a prutt in space. Nothing to worry about.

[micropet]

My whole home automation runs on mqtt. There is already a lot of traffic. I still tried to suppress messages that are not necessary on my own devices.

But well, if that's not so easy, then it has to stay that way.

[Grovkillen]

I understand your concern but really, it's not an issue.. you shouldn't worry about MQTT being overcrowded. Your server must be really low-tech for you to bring it down with messages... :)

[micropet]

I also like to look at the readings of individual devices. This looks like the screenshot. Since I really only want to see relevant values. It's also a limitation. :)

Anyway, let's forget that.

[Grovkillen]

I suggest you download a real viewer instead of that. :)

[micropet]

Which one?

But can it be better - without Schnick-Schnack?

[Grovkillen]

For Android I use "MQTT Snooper", for Windows I use a software a friend made; "MQTT Viewer".

[micropet]

Thank you.

[micropet]

Wau, MQTT Viewer is great!!

[micropet]

That's how I imagined it. Did not know that there is such a clear program.