Tag reader for connecting with RFID reader through LLRP(LLRP UHF RFID Driver for node.js/TypeScript)
==========
llrp protocol implementation
Nodejs module to read RFID tags by connecting to a RFID reader through LLRP protocol.
v.0.0.1 - version based on https://github.com/GeenenTijd/llrp-nodejs
v.0.0.2 - Code refactoring. Add Impinj Specific message for AddRoSpec. Add close connection public method. Add parsing for AntennaID, PeakRSSI, LastSeenTimestampUTC.
v.0.0.3 - Code refactoring. Add llrp message creator. Fixed bugs in endode.js. Add received EPC96 or EPC numbers. Add disableRFTransmitter and enableRFTransmitter methods.
v.0.0.4 - Converted code to TypeScript. Add unit tests.
v.0.0.5 - Add reading of TID number.
v.0.0.6 - Add configuration for antennas number.
v.0.0.7 - Add antenna power configuration.
v.0.0.8 - Fix sending command when socket is closed.
v.0.0.9 - Add radio transmitter on/off commands and events.
Yaroslav Slipchuk
yarn add llrp-ts
You can provide a config object with the following values:
ipaddress - IP of the RFID reader (default 192.168.0.30)
port - port of the RFID reader (default 5084)
and radio operation configuration according to the llrp protocol https://www.gs1.org/standards/epc-rfid/llrp/1-1-0
connect(), disconnect(), disableRFTransmitter(), enableRFTransmitter()
import { LLRP, RfidReaderEvent } from './index';
import { ReaderConfig, TagInformation } from './interfaces/llrp';
// reader tcp/ip config
const config: ReaderConfig = {
ipaddress: '192.168.1.90',
port : 5084,
radioOperationConfig: {
enableReadingTid: true,
modeIndex: 3,
tagPopulation: 4,
channelIndex: 1,
inventorySearchMode: 1, // 1 - Single target (impinj custom parameter)
antennasConfig: [
// NOTE:
// if no object in array it is switch all antennas on
// { number: 0, power: 31.5 } - switch all antennas on with 31.5 dBm
// { number: 1, power: 10.0 } - switch the first antenna on with 10 dBm
{ number: 1, power: 31.5 },
// { number: 2, power: 31.5 },
// { number: 3, power: 31.5 },
// { number: 4, power: 31.5 }
]
}
};
const reader: LLRP = new LLRP(config, console);
reader.connect();
reader.on(RfidReaderEvent.Timeout, () => {
console.log('timeout');
});
reader.on(RfidReaderEvent.Disconnect, (error: Error) => {
console.log('disconnect', error);
});
reader.on(RfidReaderEvent.Error, (error: any) => {
console.log(`error: JSON.stringify(${ error })`);
});
reader.on(RfidReaderEvent.DisabledRadioOperation, () => {
console.log('disabledRadioOperation');
});
reader.on(RfidReaderEvent.StartedRadioOperation, () => {
console.log('startedRadioOperation');
});
reader.on(RfidReaderEvent.LlrpError, (error: Error) => {
console.log('protocol error:', error);
});
reader.on(RfidReaderEvent.DidSeeTag, (tag: TagInformation) => {
console.log(`Read: ${ JSON.stringify(tag) }`);
// if (tag.EPC96) console.log('EPC96: ' + JSON.stringify(tag.EPC96));
// if (tag.EPCData) console.log('EPCData: ' + JSON.stringify(tag.EPCData));
// if (tag.TID) console.log('TID: ' + JSON.stringify(tag.TID));
});
setInterval(
() => {
reader.disableRFTransmitter();
console.log('RFID:disable rfid');
},
10000
);
setTimeout(
() => setInterval(
() => {
reader.enableRFTransmitter();
console.log('RFID:enable rfid');
},
10000
),
5000
);
function normalExit(): void {
reader.disconnect();
setTimeout(() => { process.exit(0); }, 1000);
}
process.on('SIGINT', () => {
console.log('SIGINT');
normalExit();
});
process.on('SIGQUIT', () => {
console.log('SIGQUIT');
normalExit();
});
process.on('SIGTERM', () => {
console.log('SIGTERM');
normalExit();
});
// catches uncaught exceptions
process.on('uncaughtException', () => {
console.log('uncaughtException');
normalExit();
});
// catches unhandled promise rejection
process.on('unhandledRejection', () => {
console.log('unhandledRejection');
normalExit();
});
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