ZigeBee Newtork persistence - need for clarifications
dario bonino
Dear Jemma developers,
I'm writing to get a clarification about survival of the ZigBee network after power losses. We (The Dog Gateway development team) are currently using an old version of the GAL server (C/C++) and the old closed source libraries contributed by Telecom Italia (latest version before the first Jemma release), and we are currently experiencing network instability problems on power losses.
Typically, when we power down the system running the GAL server and disconnect ZigBee devices from the power line (e.g., for moving the devices), at the subsequent re-start we get a GAL error on packet encryption / decryption. In such case, the only way for getting the network up again is to manually "disassociate" every device and the re-include them in the network. The real problem is that such an issue occurs almost any time we shutdown the machine running the GAL. To better clarify, the machine running the GAL is a RaspberryPi type B (with a flexygrid usb key for getting ZigBee connectivity), and is typically turned off by disconnecting the power chord (non-clean shutdown).
Is there any parameter in the GAL configuration who must be set to persist the network (key) and let it survive to power losses? we are currently using StartUpControl = 0 in the config.ini file used by the server. (I can provide the full config.ini if needed)
Thanks very much for your kind support
Best regards
Dario Bonino
Ranalli Andrea
Dear Dario,
You need to carefully se the “startupMode” attribute. There are in fact three possible scenario to startup a ZigBee network:
· 0 - StartupSetMode=0x18 (CommissioningMode) AND StartupControlMode=0x00 (Association) --> To be used the first time, when the network is created
· 1 - StartupSetMode=0x00 (use NVM) AND StartupControlMode=0x04 (SilentStart) --> To be used at running time
· 2 - StartupSetMode=0x18 (CommissioningMode) AND StartupControlMode=0x04 (SilentStart) --> To be used for TC
Thus, the first time you create a ZigBee network you should use the value “0”, then for all the rest of the times you shall set this value to “1” so that you’re sure that even after a power loss the network can restart using the previous setting, stored in the NotVolatileMemory.
Another alternative, every time before to launch a StartGatewayDevice procedure be sure to run a Reset procedure having the NotVolatileMemory as parameter: this would guarantee you that independently on the value set on the config.ini, the GAL will start always taking into account the previously stored settings.
Best regards,
Andrea
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Telecom Italia
Andrea Ranalli
Open Innovation Research – Future Internet Trial (SI.OIR.FIT)
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Da: jemma-...@googlegroups.com [mailto:jemma-...@googlegroups.com]
Per conto di dario bonino
Inviato: mercoledì 30 aprile 2014 10:31
A: jemma-...@googlegroups.com
Oggetto: [jemma-general] ZigeBee Newtork persistence - need for clarifications
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Dario Bonino
thank you very much,
I'll amend the startup management according to your suggestion.
best regards
Dario
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