Inventory Tutorial

Overview

This Tutorial provides a walk-through of the steps to perform Inventory operation using RFID API3

Create The Project

• Start by creating a new project in Android Studio. For help, see the Android Studio tutorial.
• Refer Hello RFID to prepare basic setup to work with RFID Reader and then follow this guide

Details

A Simple continuous Inventory operation reads all tags in the field of view on all antennas of the connected RFID reader. It uses no filters (pre-filters or post-filters) and the start and stop trigger for the inventory is the default - immediate type. forexample, start immediately when reader.Actions.Inventory.perform() is called, and stop immediately when reader.Actions.Inventory.stop() is called

Setting it up

Event and Trigger configuration to setup operation

        // tag event with tag data
        reader.Events.setTagReadEvent(true);
        // application will collect tag using getReadTags API
        reader.Events.setAttachTagDataWithReadEvent(false);
        
        TriggerInfo triggerInfo = new TriggerInfo();
        triggerInfo.StartTrigger.setTriggerType(START_TRIGGER_TYPE.START_TRIGGER_TYPE_IMMEDIATE);
        triggerInfo.StopTrigger.setTriggerType(STOP_TRIGGER_TYPE.STOP_TRIGGER_TYPE_IMMEDIATE);
        // set start and stop triggers
        reader.Config.setStartTrigger(triggerInfo.StartTrigger);
        reader.Config.setStopTrigger(triggerInfo.StopTrigger);

Performing operation

start and stop inventory calls

    try {
        // perform simple inventory 
        reader.Actions.Inventory.perform();

        // Sleep or wait
        Thread.sleep(5000);

        // stop the inventory 
        reader.Actions.Inventory.stop();

    } catch (InvalidUsageException e) {
        e.printStackTrace();
    } catch (final OperationFailureException e) {
        e.printStackTrace();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }

Grab the results

Gets results in eventreadnotify when reader starts reporting the read tags

        public void eventReadNotify(RfidReadEvents e) {
            TagData[] myTags = reader.Actions.getReadTags(100);
            if (myTags != null) {
                for (int index = 0; index < myTags.length; index++) {
                    Log.d(TAG, "Tag ID " + myTags[index].getTagID());
                }
            }
        }

Closer look

• API call Inventory.perform() starts operation on reader
• API call Inventory.stop() stops operation on reader
• API call getReadTags request to retrieve 100 tags from SDK's internal queue of tags, one can change this number as per tag reading speed or application processing speed

What's Next

• Print various status notification in eventStatusNotify to see inventory start and stop events
• setAttachTagDataWithReadEvent to true and receive each tag data in RfidReadEvents