I am looking for a way to have a physical device that senses a human in a set area to enable the RFID reader to document reads. The goal would be to have the antennas or the Clearstream database updating put on pause until someone is moving in the area. If someone is moving in the area the reader would then initialize the antennas or Clearstream would start updating database fields and continue to do so for a duration of time after it senses movement. At the moment I have tried setting up a the hardware below, but I can only figure output options like enabling a LED (and not input). Current Hardware: - Motorola FX7500 Reader GPIO options that I have, but can purchase a suggested piece of hardware aswell. -Bosch Motion Detector. Model: ISC-BPR2-WP12. http://resource.boschsecurity.com/documents/BlueLine_Gen_2_Data_sheet_enUS_2603228171.pdf -Enforcer Retro-Reflective Sensor. Model: E-931-S35RRQ http://www.seco-larm.com/pdfs/Mi-E-931-S35RRQ.pdf Any ideas on where to go or what to do would help! Thank you.