The following documentation relates to PCR2 Firmware V3.11.x
PCR2 are radar peopleflow sensors for use with LoRaWAN® connectivity. The system includes powerful signal processing that enables directional measurement. Counters are transmitted in regular intervals over a public or private LoRaWAN® network. PCR2 detects both direction independently if there is some space between the persons.
PCR2 are 1D sensors measuring Peopleflow walking along a virtual line. The device can be mounted on walls, door frames or over-head.
PCR2 devices should be mounted sidewise if possible for best performance.
| Installation height: | 1.2-1.4m above ground |
| Direction: | Surface should be parallel to direction of movement |
| Distance between persons: | 40° or more |
PCR2 could be mounted over head.
Note: Detection wide is reduced to 34° when placed over heads. Minimum distance from sensor to person’s head should be more than 0.5m
| Installation height: | 0.5-4m above person’s head |
| Direction: | Surface should be parallel to direction of movement |
| Distance between persons: | 40° or more |
To increase counting accuracy we strongly recommend avoiding following situations
Objects like poles, wall, doorframes in radar field of view (FOV) can generate reflexions and reduce measurement performance
Moving objects others than people (escalators, ventilators, curtains)
People walking side by side
Too wide entries will reduce accuracy (lots of side-by-side entries)
Integrated radar technology results in a constant power consumption between 127-160mW. All PCR2 Indoor sensors need to be external powered.
Use a USB power supply to power the PCR2 device by connecting the Micro-USB plug to the “CONFIG” socket.
Note: Use a power supply with low power output. Big power supplies tend to oscillate when there is a very small load.
Alternatively you can power PCR2 devices by using a 5-12V DC constant voltage power supply connected to the terminals “POWER”.
We recommend using the PCR Setup Tool for initial configuration of your device.
You find the download link in the Document section of our website.
Once installed and connected to your PCR2 you see following screen.
Change your settings on the right panel
Press the “Save” button to write changes to the device
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After switching on the device, following sequence will start.
Initialization of Radar Processor. LEDs are constantely on.
Start Join-Procedure (only if LoRa Modem is enabled). LEDs are blinking slowly
After receiving Join Accept, the device switches sends the Configuration Payload on port 190
LEDs are off and are quickly flashing if a object gets detected.
After Interval time is up, the device sends the PCR2 Application Payload on port 14. This can be done in Confirmed or Unconfirmed Mode.
In Confirmed mode LEDs are on until successful received a ACK. After receiving the ACK LTR and RTL counters will be reset. If the device operated in Unconfirmed Mode counters will be immediately reset after sending w/o waiting for an ACK.
LEDs will by on during hardware initialisation (10s)
LED will start to blink during Join Sequence
LED go off when network has joined
Left or right LED will blink shortly when detection movement
The inactivity timeout can be used to automatically reset sum counters (RTL_SUM and LTR_SUM) if there is no movement for a certain time. This is useful if absolute counting of persons is used and one would like to start with zero in the morning. Inactivity Limit can be enabled by setting the value to zero.
There are several reasons why an end device could land in a stranded state where it does not receive any downlink messages from the network, including:
The device transitioned quickly between two gateways with channel maps that don’t overlap
The device’s RX1 and RX2 reception parameters become out of sync with the network server
The device roamed to a different network provider’s region (if there is no roaming agreement between those two providers)
PCR2 devices using the Link Check Request/Answer mac command for detecting if there is still a connection to a Gateway.