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The technology structure behind directional signage is simple –
  • a smart tag/fob with a passive RFID tag
  • an RFID reader (MFRC522) that converts the input into a digital output
  • a computer (Raspberry PI) that reads the digital input (unique identifier)
  • Wi-Fi connection to access the right direction information from cloud
  • the computer use the gathered information to light up the correct LED
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