• Since your installation is stationary, IR optical works perfect: just put a decently adjusted reflective sticker on the wall/gate post/or what ever is on the opposite side of the sensor (transmitter and receiver). ...and to make the count reliable, place more than one on different heights and 'widths'
    and use some smartness to detect flailing arms or legs of tall people or alike.

  • Yeah good point. Actually the complete usage is more of a cheap "entrance control" than people counting... Basically if someone pass the check point without access rights, the checking mobile phone (fixed at the gateway) will raise an alarm. In order to get access, the user has to provide a valid QR code (from their phone) to the stationary checking mobile phone and that will disable the alarm for the next person passing. It isn't intended to be a strict check, just would make people opt to scan and track their presence.

    My use-case is at gym without a fixed front desk, but there would be people (and admins) around when the system is turned on.

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