Documentation on IKEA payload messages?

My setup is a PI with HA using conbee II to read my sensors.
Also using HUE bridge.
Now I would like to add some IKEA sensors/buttons to my system.

I have configured deCONZ and both some lights, the button and motion sensors appears.
I can see that the motion sensor switches state in deCONZ.

Now I would like to use nodeRED and import different functions of the sensors.
The sensor appears when searching for the entity ID.
Next step would be to add a state via JSON string data.

Is there a list of payload messages the different sensors can have?
Would be great if there where a wiki page or simular where each sensor and their messages was described.
I have seen something about which button and what type of press it was but all info needs to be collected from different github places…

Zigbee2mqtt is completely open source and will give you some clues.