While this can be installed in any server with crontab, I recommend installing it in a local network server or in the same server host adguardhome due to the basic authentication security used by AdguardHome.
$ git clone https://github.com/MrcRjs/adguardhome-scheduled-block-service.git aghblock
$ cd aghblock && sudo make install
Once installation is complete you need to set your own configuration adding the following environment variables to your .bash_profile or .profile.
export AGH_SERVER="127.0.0.1:2023" # Your adguard home server ip and port
export AGH_USER="your_agh_username"
export AGH_PASS="your_agh_password"
Confirm your configuration works by getting the current services blocked status with:
$ aghblock status
We'll use crontab as it is widely available for linux distributions including OpenWrt.
Edit your crontab file from a terminal in openwrt:
$ crontab -e
To block services during the weekdays Monday to Friday at 9am add:
0 09 * * 1-5 aghblock block facebook,youtube,instagram,tiktok
crontab.guru is a great resource to build / understand a cron schedule.
We add one more line to unblock services during the weekdays Monday to Friday at 5pm add:
0 17 * * 1-5 aghblock unblock facebook,youtube,instagram,tiktok
Note you can also update your crontab through the UI luci app by clicking on System -> Scheduled Tasks you can paste the same lines from the previous steps.