How to read the temperature code RFM200-AFR using NordicID API

[Daniel Commins]

I tried to follow the coding example for the Nordic ID reader from the AN002F40 application note as closely as I could, but there’s never any temp code data returned. I’m using the Nordic ID java api and not the C# api used in the application note example. Can you point out which step I’m not coding correctly?

 

public void readTempByEpc( byte[] epc ) {
String epcString = NurApi.byteArrayToHexString( epc );

CustomExchangeParams tempSelect = new CustomExchangeParams();
tempSelect.bitBuffer = new byte[ NurApi.MAX_BITSTR_BITS / 8 ];

try {
int txLen = 0;
txLen = NurApi.bitBufferAddValue( tempSelect.bitBuffer, 0xA, 4, txLen );
txLen = NurApi.bitBufferAddValue( tempSelect.bitBuffer, 0x0, 3, txLen );
txLen = NurApi.bitBufferAddValue( tempSelect.bitBuffer, 0x1, 3, txLen );
txLen = NurApi.bitBufferAddValue( tempSelect.bitBuffer, 0x3, 2, txLen );
txLen = NurApi.bitBufferAddEBV32( tempSelect.bitBuffer, 0xE0, txLen );
txLen = NurApi.bitBufferAddValue( tempSelect.bitBuffer, 0x0, 8, txLen );
txLen = NurApi.bitBufferAddValue( tempSelect.bitBuffer, 0x0, 1, txLen );
tempSelect.txLen = txLen;
tempSelect.asWrite = true; tempSelect.txOnly = true; tempSelect.noTxCRC = false;
tempSelect.rxLen = 0; tempSelect.rxTimeout = 20; tempSelect.appendHandle = false;
tempSelect.xorRN16 = false; tempSelect.noRxCRC = false; tempSelect.rxLenUnknown = false;
tempSelect.txCRC5 = false; tempSelect.rxStripHandle = false;

NurInventoryExtended invExParams = new NurInventoryExtended();
invExParams.inventorySelState = 0;
invExParams.inventoryTarget = 0;
invExParams.Q = 0;
invExParams.rounds = 5;
invExParams.session = NurApi.SESSION_S0;

new NurCmdInvReadConfig( true, NurApi.IRTYPE_EPCDATA, NurApi.BANK_PASSWD, 0xE, 1);

for( int cycle = 1; cycle <= 20; cycle++ ) {
api.inventory( 1, 1, 0 );
api.clearIdBuffer( true );
api.setExtendedCarrier( true );

api.customExchangeByEpc( epc, tempSelect );

Thread.sleep( 3 );
System.out.println( “Read attempt ” + cycle );

api.inventorySelectByEpc( 0, 0, 0, false, epc, epc.length );

api.fetchTags( true );
for (int n=0; n<api.getStorage().size(); n++) {
NurTag tag = api.getStorage().get(n);

int tempCode = -1;

if( tag.getIrData() != null ) {
System.out.println( “SUCCESS” );
tempCode = tag.getIrData()[0] * 256 + tag.getIrData()[1];
}
System.out.println(String.format(“tag[%d] EPC ‘%s’ RSSI %d TempCode %Xh”, n, tag.getEpcString(), tag.getRssi(), tempCode));
}
}

api.setExtendedCarrier( false );
api.clearIdBuffer( true );

} catch( Exception e ) {
e.printStackTrace();
}

}

[Gabe Seitz]

Hi Daniel,

There’s many possible things that can be wrong, however we recently released complete sample code for Nordic ID fixed readers.

Check it out here: https://github.com/Axzon/reader-sample-code.

Best,

Gabe

[Author]

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