Winext AN-203A - Data Communication Formats; Heartbeat Packet Structure; Alert and Cancel Alert Packet Details

AN-203A Water Level Monitor User Manual
17
6. Communication Format
6.1 Heartbeat packet
The data consists of 5 bytes. Here are the definitions below:
0
Sensor type
1 byte
0x05 fixed value
1
Frame type
1 byte
0x01 fixed value
2
Battery voltage
1 byte
The highest level data:
0: normal; 1: low voltage
The 7
th
of the low level data shows the
voltage value. The actual value needs
to be divided by 10.
3
Water level
2 byte
The high level data come before low
level data, measured in cm.
4
6.2 Alert and cancel alert packet
The data consists of 5 bytes. Here are the definitions below:
0
Sensor type
1 byte
0x05 fixed value
1
Frame type
1 byte
0x02 fixed value
2
Battery voltage
1 byte
The highest level data:
0: normal; 1: low voltage
The 7
th
of the low level data shows the
voltage value as it needs to divided by
10
3
Water level
2 byte
The high level data come before low
level data, measured in cm.
4