supla server 2.0 on raspberry arduino device disconnected

[emilius3m]

I have upgraded the rpi image with php 7 and rebuild supla server. all is ok after 10 hours of "lectures" (more problem with the openssl library).
At the moment the server is running and work.
The only problem is the status of the device on the "I / O Devices": I connected an arduino and with the app for Android i can control the connected device, but on the administration page it shows the status is always disconnected. please watch the attachment

[pzygmunt]

Hmmm. Check app logs.

[emilius3m]

nothing. /var/www/html/var/logs/prod.log is empty.

/var/www/html/var/sessions is empty. very strange.

[pzygmunt]

/var/www/cloud.supla.org/var/logs

[emilius3m]

My document root for apache is /var/www/html and var/log contain prod.log but is empty

[pzygmunt]

netstat -an |grep supla-server-ctrl.sock

[pzygmunt]

ls -l /tmp/supla-server-ctrl.sock

[emilius3m]

[pzygmunt]

vi /etc/systemd/system/multi-user.target.wants/apache2.service

replace
PrivateTmp=true
to
PrivateTmp=false

systemctl daemon-reload
/etc/init.d/apache2 restart

[pzygmunt]

vi /etc/systemd/system/multi-user.target.wants/apache2.service

replace
PrivateTmp=true
with
PrivateTmp=false

systemctl daemon-reload
/etc/init.d/apache2 restart