Reader Appeared/Disappeared

RFID SDK for Android 2.0.4.192

Applicable Devices : RFID integrated Mobile Computers

Overview

This tutorial provides scenarios when a reader disappears and reappears.

Details

Below are the scenarios when a reader disappears when it is connected.

  • Reader disappears while charging or USB cable is connected.
  • Reader disappears when Battery switchs to critical state.
  • Reader disappears when Airplane mode is ON.

Below are the scenarios when a reader appears when it is connected.

  • Reader appears USB cable is removed.
  • Reader appears when Battery switchs to optimal state.
  • Reader appears when Airplane mode is OFF.
NOTE :
  • We introduced new limitation "stop while charging" to avoid operating RFID when device is in charge (for conducted emission). However, for debug purpose, you can workaround this limitation by sending intents.
  • Allow connecting to reader

    adb shell am broadcast -a rfid.intent.action.OPERATE_WHILE_CHARGING --ez ON 1

    Revert to default limitation

    adb shell am broadcast -a rfid.intent.action.OPERATE_WHILE_CHARGING --ez ON 0
  • Cohabitation with RFDXX : when the user try connecting RFID Integrated mobile computers to RFDXX devices with RE40 connected , the integrated RE40 will disconnect(disappear) and it will connect for RFDXX devices.
  • For handling the availability and unavailability with corresponding rfid devices, please refer to the link reader availability/unavailability.