Updated firmware of the SLZ-06 today to 3.2.7. At first everything seemed to be fine, but after a maybe 2 hours the zigbee network became unreliable and is full of “MAC_CHANNEL_ACCESS_FAILURE” warnings.
Downgrading to the previous firmware 3.2.0 did not help. Reboot of z2m oder SLZB06 did not help.
Some advice?
Tried many things:
firmware up & downgrades
copying z2m backupfiles back
etc.
Then I read that “MAC channel access failure” most often caused by interferences. So I moved away a USB-cable that powers a presence sensor and was near the SLZB-06, and after that z2m worked normal again.
Updated the SLZB-06 to the newest firmware again and still no errors.
The cable is in the same position since month, why it caused interferences now is unknown to me.