How Do I Decode a No-Probe Temperature Sensor Event

How Do I Decode a No-Probe Temperature Sensor Event

The No-Probe Temperature Sensor will generate events if the temperature rises above or falls below the configured thresholds

 

Byte 0: 7-4

Byte 0: 3-0

Byte 1

Byte 2 

 

Byte 3

Byte 4

Protocol version

 

 

(4 bits)

Counter

 

 

 

(4 bits)

No-Probe Temp Sensor Message Type Code

 

0x09

Temperature

Event Payload

 

 

 

(0x01 in the example below)

Current Temperature in Degrees Celsius

 

 

 

(0x13 in the example below)

Relative Temperature Measurement

(ranges from 0-255)

 



(0x21 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 Code

              0x09 represents the No-Probe Temperature Sensor’s Message Type Code

 

No-Probe Temperature Sensor Event

              Byte 2                         Description

                  0x00                              Periodic report

                  0x01                              Temperature has risen above upper threshold

                  0x02                              Temperature has fallen below lower threshold

                  0x03                              Report on change increase

                  0x04                              Report on change decrease

 

Byte 3

              Current temperature in degrees Celsius

 

Byte 4

              The relative temperature measurement is the raw (analog to digital) measurement and ranges on a scale from 0-255. This value can be used with different calibration tables defined by the user.

 


Example of No Probe Temperature Sensor Event Message

 

10 09 01 13 21

 

1                                 Protocol Version (currently always 0x1)

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

09                              Message Type Code (0x09 = No-Probe Temperature Sensor identifying value)


01                              Temperature Event Payload (Event 0x01 = Temperature has risen above upper threshold)

13                              Current temperature in degrees Celsius (0x13 = 19 Degrees Celsius)

21                              Relative Temperature Measurement (0x21 = value 33 of range 0-255)

 

 

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

 

Temperature Event: Temperature has risen above upper threshold

Temperature in degrees Celsius: 19 C



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