Panasonic viera remote with wetek play 2

I use CoreELEC-Amlogic.arm-9.2-nightly_20200114 on a wetek play 2 connected to a yamaha rx v465 and a panasonic 50st60. The wetec remote works well. With the cec I can turn everything on and off. The panasonic remote also works with cec. The only thing I can’t do is turn on the wetec and, through cec, also amplifier and tv. I can turn everything off but not on. What can be done?

edit it with the keymaps editor use the addon. Choose a key to turn it off.

Sorry but I can’t turn it off, I can’t turn it on. I know the addon key map editor. I mapped all the keys except the one to turn on the wetek.