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.
- 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.
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