Usage of EFR32 as sniffer for Zigbee/Thread

Using EFR32 as a sniffer for Zigbee/Thread
Silicon labs' EFR32 can use EFR32 as a sniffer by burning the railtest program and executing some CLI commands.

Sniffer related CLI commands:

• status: Display the working status of Railtest Dangdang
• rx 0: Let the radio enter the idle state, railtest can change the frequency setting only in the idle state.
• config2p4GHz802154: configure railtest to 802.15.4 physical layer
• setBleMode 1: configure railtest as the physical layer of Bluetooth LE
• enable802154 rx 100 192 864: enable 802.15.4 accept mode
• setPtiProtocol 5: Set PTI protocol mode for Network Analyzer, 0=Custom 2=Thread 3=BLE 4=Connect 5=Zigbee 6=Z-Wave
• setPromiscuousMode 1: put the radio into promiscuous mode, sniffer requires the radio to work in promiscuous mode
• setChannel 11: Set the channel of the radio, the channel number of 2.4Ghz 802.15.4 is 11-26
• setnotifications 0: sniffer messages are not displayed on the CLI
• rx 1: put the radio into receive mode

railtest scripting mode:
The command scripting feature built into RAILtest allows the railtest program to automatically execute CLI commands without going back and forth on the command line.Commands to be executed can be queued in RAILtest and executed in sequence after railtest is powered on and restarted.Command scripts can be saved to flash (NVM3) and any saved scripts will run automatically when the device boots.

For railtest to support command script mode, the "CLI Storage in NVM3" component needs to be installed when building a railtest project.
Zigbee sniffer's Script:

enterscript 1statusrx 0config2p4GHz802154enable802154 rx 100 192 864setPtiProtocol 5setPromiscuousMode 1setChannel 11setnotifications 0rx 1endscript

Using Network Analyzer:

• Select Window >Preferences>Network Analyzer >Decoding > Stack Versions in Simplicity studio to set Network Analyzer to decode the correct protocol.Then start Network Analyzer.
• Network Analyzer->Decoding->Security Keys, then add Network Key
• Running Network Analyzer on Simplicity studio starts sniffer.The text box above Network Analyzer can be used to filter messages.Right click on the packet you want to filter and click "Show only summary: Many..." and change the condition from "==" to "!=".
  
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