User's Manual

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Frames
7. Frames
7.1. Firmware version v2.x.x
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same for Sigfox and LoRaWAN. Bytes 0 and 1 are common for all frames. Byte 0 has the basic information of the
node and frame.
Bit Name Description
7 Parking slot status
'0' indicates that the parking slot is empty
'1' indicates that the slot is in occupied
6 Battery state
'0' indicates that the battery has a good level of charge
‘1’ indicates that the battery has little charge and it will be necessary
to change it. When the battery has little charge it is possible that the
node does not work properly and the radios fail sending the frames.
5-4 Reserved Reserved bits. Do not consider.
3
Frame type
0 – Info frame
1 – Keep-Alive frame
2 – Daily update frame
3 – Error frame
4 – Start frame 1
5 – Start frame 2
Values from 6 to 15 are reserved
Values from 6 to 15 are reserved
2
1
0
Figure : Byte 0 description
Byte 1 is a frame counter, it goes from 0 to 255. This byte can be used to detect lost frames (sent by the node but
not received).
7.1.1. Info frame
It is the most common frame sent by the node. The node will send this kind of frame each time it detects that the
parking slot changed from empty to occupied or vice-versa. The other bytes are used to give additional data to
the user.
Byte Name Description
0 Basic data Detailed description in the section “Frame”
1 Frame counter Detailed description in the section “Frame”
2 Temperature
Temperature (Celsius degrees) from the node's internal sensor. The
value of temperature is a signed integer.
3 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.
4 X axis measurement LSB
5 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.
6 Y axis measurement LSB
7 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.
8 Z axis measurement LSB
9-10 Reserved Reserved bytes. Do not consider.
Figure : Info frame structure