Use Heartbeat to check alive LPN

Hello everyone,

I'm using Gateway (serial example) and send packet "Heartbeat Get" to Devices (Light Switch Server Example )to check alive of devices. But when check alive of Device (LPN), Devices don't response data to Gateway. 

I don't know Is LPN support heartbeat?. If you know this problem, please Let me know.

Thank you so much.

Best Regard,

Trong.

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