At the core of most modern patrol tour systems used in Singapore are NFC (Near Field Communication), RFID (Radio-Frequency Identification) tags, or QR codes strategically placed at various checkpoints along a defined patrol route. The patrolling personnel use a handheld device typically a ruggedized smartphone or a dedicated patrol reader to scan these tags or codes as they visit each... https://exigasoftware.com.sg/patrol-tour-system/