The PIR has two adjustment potentiometers on the back.
- The first adjusts the sensitivity of the sensor. You should start with a reading towards the "min" side, and adjust clockwise as necessary.
- The second adjusts the time the sensor stays "latched" or in the on state. When testing, leave this at the left which is a short time. Adjust clockwise for longer intervals.
Once it is working, you can adjust the potentiometers to increase sensitivity and/or the delay used.
One programming note: the Arduino delay software routine cannot be used with the libraries as it adds a bit too much code. Try to adjust using the PIR potentiometers.
Mount the display box near the entrance to the room monitored. Mount the PIR sensor so it has a "field of view" of a wide area of the inside of the room. For a conference room, the table area would be best (do not aim above peoples heads).
Run power from an outlet to the display box. Ensure you have a 5 volt DC supply.