How do I decode a Water Leak Sensor event?

How do I decode a Water Leak Sensor event?

The Water Leak Sensor will generate events when water (or another liquid) is present, and then give a value representing the relative measurement of the resistance between the probes of the sensor. The Water Leak Sensor uses that resistance to determine if water (or another liquid) is present.

 

Byte 0: 7-4

Byte 0: 3-0

Byte 1

Byte 2 

 

Byte 3

Protocol version

 

 

(4 bits)

Counter

 

 

 

​(4 bits)

Message Type Code

 

 

(0x08)

Water Event

 

 

(0x00 in the example below)

Relative Measurement

 

 

(0x80 in the example below)

 

 

 

Protocol Definition

              First 4 bits are defined by Radio Bridge for the protocol

              Next 4 bits are a counter that goes from 0 to F (Hex) and repeats

             

Message Type

              0x08  represents the Water Leak Sensor Message Type

 

Water Event

              Byte 2                         Description

    0x00                                Water or liquid present

    0x01                                Water or liquid not present

 

Relative Measurement

              0x00 – 0xFF                     represents the resistance between the sensor probes (0-255)

 

Example of Water Leak Event Message

      10 08 00 80 

      1                                 Protocol Version (currently always 0x1)

      0                                 Packet Counter (increments by 1 each message and wraps from 0xF to 0x0)

      08                               Message Type Code (Water Leak Event = 0x08)

      00                                Water Event (Water Event = 0x00  which means “water or liquid is present”)

      80                                Relative Measurement (Relative Measurement is = 0x80 = 128)

 

 

The Radio Bridge Console will generate the following output for this message:

Water Event: Water or liquid present
Relative measurement: 128

 

 

 

 

 



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