Read Tag Temperature

The readTemperature API reads the temperature from a temperature-sensing RFID tag and returns the value in degrees Celsius.

Note: This API is supported only on RFD40 and RFD90 readers running the latest firmware.

API

Class: com.zebra.rfid.api3.AxzonTemperatureReader

public AxzonTemperatureReader(RFIDReader reader)

public double readTemperature(String tagId)
        throws InvalidUsageException, OperationFailureException

Parameters

Parameter	Type	Description
reader	RFIDReader	A connected RFIDReader instance, passed to the constructor.
tagId	String	EPC of the tag to read, as a hex string.

Return value

Type	Description
double	The tag temperature in degrees Celsius.

How to use

Create an AxzonTemperatureReader with a connected reader and call readTemperature with the tag EPC.

import com.zebra.rfid.api3.AxzonTemperatureReader;

// 'reader' is a connected RFIDReader instance
AxzonTemperatureReader tempReader = new AxzonTemperatureReader(reader);

try {
    double celsius = tempReader.readTemperature("AABBCCDDEEFF001122334455");
    Log.d(TAG, "Temperature: " + celsius + " C");

} catch (Exception e) {
    Log.e(TAG, "Temperature read failed: " + e.getMessage());
}

Notes

• Supported only on RFD40 and RFD90 readers with the latest firmware.
• The reader must be connected before calling the API.
• The call takes a few seconds to complete, so call it from a background thread and not from the UI thread.
• One tag is read per call. Keep the tag in front of the antenna for the whole duration of the call.
• Any pre-filters that are already set are deleted when readTemperature is called. Re-apply the pre-filters after the call if the application needs them.
• The temperature is returned in Celsius. Convert to Fahrenheit in the application if required.