Imitate a swipe down gesture periodically
Use Macrodoid. It offers 5 macros for free.


On the Triggers tab, under the Device Events section, select Screen On/Off then Screen On.
On the Actions tab, under the Device Actions section, select UI Interaction. Enable Macrodroid UI interaction accessibility option. Select UI Interaction, choose Gesture, then enter the X and Y values (X and Y screen coordinates: where to start and end the swipe).
Save the macro and give it a name. 
Edit the macro. On the Actions tab, under the Conditions/Loops section, select Repeat actions, choose While 'conditions repeat. Add a condition (I selected Screen On, under the Screen and Speaker section, then Screen On/Off.
On the Actions tab, under the Macrodroid Specific section, select Wait Before Next Action, and set the time to 1 minute.
Click the up and down arrows on the Actions block, then move the items from steps 2 and 5 to be under the While/Do condition.
Save the macro. Click the 3-dot, then Test macro.


The macro will be like the image below:



When I tested it, I set the start values at X=100, Y=300 and the end values at X=500, Y=300 to simulate a swipe from left to right. The values on the steps described above should try to swipe the status bar down. I advise to change the X and Y values so they be based on your screen resolution and needs.