User's Manual

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Frames
7.2.2. Keep-Alive frame
This frame is used to indicate that the parking slot has not changed, but the node is still working.
Byte Name Description
0 Basic data Detailed description in section “Frame”
1 Frame counter Detailed description in section “Frame”
2 Timestamp (hh) Current hours
3 Timestamp (mm) Current minutes
4 Temperature MSB Raw temperature from the node’s internal sensor. The value stored in
these two bytes is a 16-bit value in 2’s complement form. To convert to
Celsius degrees use the next formula:
5 Temperature LSB
6 X axis measurement MSB
Raw value from the sensor associated to the X axis. The value stored in
these two bytes is a 16-bit value in 2’s complement form.
7 X axis measurement LSB
8 Y axis measurement MSB
Raw value from the sensor associated to the Y axis. The value stored in
these two bytes is a 16-bit value in 2’s complement form.
9 Y axis measurement LSB
10 Z axis measurement MSB
Raw value from the sensor associated to the Z axis. The value stored in
these two bytes is a 16-bit value in 2’s complement form.
11 Z axis measurement LSB
Figure : Keep-Alive frame structure
7.2.3. Daily update frame
This frame is sent daily at 1 AM. It contains a little summary.
Byte Name Description
0 Basic data Detailed description in section “Frame”
1 Frame counter Detailed description in section “Frame”
2 Sensor measurements MSB
Unsigned 16 bit counter. It stores the times that the sensor is used
in the last 24 hours.
3 Sensor measurements LSB
4 Sigfox transmissions MSB
Unsigned 16 bit counter. It stores the times that Sigfox radio is used
in the last 24 hours.
5 Sigfox transmissions LSB
6 LoRaWAN transmissions MSB
Unsigned 16 bit counter. It stores the times that LoRaWAN radio is
used in the last 24 hours.
7 LoRaWAN transmissions LSB
8 Resets Number of resets generated in the last 24 hours
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10-11 Reserved Reserved bytes. Do not consider.
Figure : Daily update frame structure
This frame can be deactivated using the Plug & Sense! Smart Parking USB Programmer or via radio, with the
Remote Manager, setting to 0 the enable/disable daily frame bit.
The daily update frame is very special because the node waits for a response after it is sent. This response is useful
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