Display data of remote sensors

[maltic42]

Hello,

following this wonderful article (#11850) I managed to get a Waveshare 2.9 ePaper display up and running.

I am using this on a ESP32C3 with a custom build (Matter and custom display driver). I also use a LOLIN32 board with an attached DHT22 connected to a battery. This one wakes up every 60 minutes and gets back to sleep after 15 seconds. The ESP32C3 fetches the DHT22 data (temperature and humidity) from the LOLIN32 via remote Matter configuration and this data is sent via Matter to a Google Home. This works perfectly.

I attach a Waveshare 2.9 ePaper display to the ESP32C and I am able to display text. Guess what I want? I want to display the data from the remote sensor (LOLIN32) on that display, but I am not able to do so.

What I´ve learned is that I can display text using rules - this also works, but checking the local temperature of the CPU:

13:02:42.503 RSL: SENSOR = {"Time":"2023-12-17T13:02:42","ESP32":{"Temperature":54.4},"TempUnit":"C"}
13:02:42.514 RUL: TELE-ESP32#TEMPERATURE performs "DisplayText [s1p21x0y0]Temp: 54.4 C"

But how do I reference to the remote sensor data?

The Matter configuration is the following:

Local sensors and devices

Number Name Type Parameter
6 Temperature Temperature AMS2301#Temperature
7 Luftfeuchtigkeit Humidity AMS2301#Humidity

Any help is appreciated. Thanks!