FRANK333

ok thanks, 
i solved it , no need to change kernel ,
i added in /boot/armbianEnv.txt overlay_prefix=sun50i-h5 which is specific for orange pi zero plus , overlays appeared in armbian-config i selected them ,
i inserted the pa gpio corresponding to the pin connected to the 1wire sensor and everything works.
 

This bug is here for a while.
https://github.com/armbian/config/issues/33
You can enable this manually too.
 

You might need to downgrade kernel to 5.10.y

Once we get hands on some hardware (and somebody is willing to spend time on) it probably will sooner or later. Basic support for newer RK chip has already been pushed to mainline Linux.

gounthar ,
If you intend to use rpi-monitor to control the temperatures of the sensors I recommend you to leave it alone, I use domoticz works well and it's simple, if you need more info open a new post.

gounthar,
activate 1wire, edit armbianEnv.txt, connect the sensor (with pull-up resistor) to the pi pins correctly, and it will work everything

After the automatic update to kernel 4.19.17 the CPU temperature is wrong and much higher, also in dmesg there are these errors
 
OPzero+ has a heatsink and a fan, and the use of the cpu is always very low here the graphs.
The temperature of the external sensor is correct.
I ask if anyone has the same problem as me and how it could be solved.

I found the way to install, keep updated and easily uninstall plexmediaserver without using armbian-config. here is the link https://forums.plex.tv/t/read-me-first-about-server-armhf-arm64-debian-ubuntu-raspberry-pi/226567. I used the version arm64 / ARMv8 and on OPzeroplus with H5 works very well.