RTL-433, MQTT Water Meter

Third party integrations
1

I am relatively new to to HA and have been mostly working with ESP32 devices with much success. However I am trying to add a MQTT device and am struggling. I set up an RTL-SDR device on a separate computer and have it sending data via MQTT to HA, but the value is off by a factor of 100. I believe I should be ble to add a value template to the entity to scale down by dividing by 100 but I can’t figure out how to reference the device value/state/etc…The entity shows as wm wm (sensor.wm_wm) and the mqtt topic is * rtl433/meters/water/consumption I thought I could add a template like {{sensor.wm_wm|float/100}} but the reference is incorrect. What would be the proper way tyo write this.

Also, I can find all the YAML gfiles for tweaking my ESP32 devices but I can’t find any YAMLs associated with MQTT ddevic

Can anyone point me in the right direction? I’ve searched for answers but am not getting specific enough results to accomplish what i’m trying to do.

2

Too few information to give useful advices.

How do you do that:

RTL-433 doesn’t support HA auto-discovery, so you created your own YAML that point to MQTT topics, right?

3

I setup the RTL-433 to send mqtt data to my HA mqtt broker. Then in HA I went to Devices & Settings->Integrations->MQTT - add MQTT device. I did finally get the template correct by using {{ (value}float)/100 }} however if I attempt to edit the properties the template doesn’t show and if I add {{}} it again it applies the change cumulatively. Where would I find the YAML for the now existing device. I don’t seem to have a MQTTY.YML file and there are no related entries in the main YML file.