User Manual

Head Electronics • Ambachtsweg 17 • 2222 AH KATWIJK • Phone: [phone] • www.head.nl
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General information
Battery replacement
The housing of the Desksense is design in such a way it cannot be easily opened by an unauthorized user.
When the sensor is mounted below a desk is can be opened for battery replacement by inserting a hex key
to move the locking latch out of the way and sliding the housing forward.
Unlocking housing latch using 2 mm hex key.
Security
Every session is encrypted using a unique session key. Therefore, it prevents an attacker from gaining
access to the network even if one device is compromised.
Every message includes a frame counter. This frame counter is used by the network to detect and prevent
replay attacks and preventing the attacker from overloading the system.
The LoRa application credentials can be manually re-configured with custom credentials. Secondly, session
keys are renewed every (default) 2000 messages. Every (default) 12 hours the sensor transmits a heartbeat
message which needs to be acknowledged by the server. If this acknowledgement is absent for (default)
three attempts, the sensor will perform a new join request, enabling the sensor to renew the session keys
and always (try to) reconnect to the network.
Privacy
The passive infrared (PIR) sensor component only acts on motion sensing and does not recognize any
person specifically nor register personal data.