CC2531: Don't receive data after the coordinator power loss in HA network

I would suggest you to use sniffer to check what exactly happens over the air.

I can't send my packet at the moment because I don't have enough tools.

My problem is when the dispatcher suddenly loses power after power is back, the child devices don't send data anymore.

What should I do to get the end devices to send data back?

When coordinator is back, you might need to wait a while for sleeping end device to rejoin. You should see device announcement if device joins back. After that, your device should be able to communicate again.

Do I need to submit any request for the device to re-join or is it a previous binding ?

Can you specify what device you are using? 3rd party device or your own design?

The coordinator is built on top of Z-tool 2.0 by a few command lines 

I mean to ask what is your end device.

I'm using Door Sensor (ZB-DS01) of SONOFF

I suppose commercial door sensor should have its own rejoin timer. You have to wait and see device announcement to communicate with it. For binding, I don't think you need to do it again with rejoin case.

I received a response from my coordinator :
Serial response: fe 06 41 80 00 02 00 02 07 02 c2
I checked the docs and it looks like the coordinator has been reset

Can you tell me what commands I need to run on Ztool to build a complete coordinator?

Can you give me some references on using Wireshark latest version to sniffer zigbee network ?

Thank you very much

Try to refer to [FAQ] Zigbee Packet Sniffing Solutions

Please note that the SimpleLink sniffer firmware and Packet Sniffer 2 software have only been known to work with Wireshark v3.0.x

Regards,
Ryan