How can i Rejoin with the previously paired network after power goes off ?

Hi,

The OpenThread stack should store the network dataset in flash during the commissioning procedure. When you power cycle the device, your application should be able to utilize the existing credentials to rejoin the network. See this post for more details.

You can use the function otDatasetIsCommissioned() to check if the dataset is commissioned, to determine if you should start joiner process or not.

Best regards,
Jørgen

is dataset stored in flash automatically after successfully got paired?

I can see now my device is getting reconnecting into the network. One issue i am facing now with this implementation. i.e while i am trying to change few parameters of the device, i observed in sniffer that sometimes parameters are getting changed and some times not, getting time out error. what may the cause would you let me know?

Please post a new ticket where you describe the issue in detail and include the sniffer logs. Then we will help you resolve it.

There is still issues while reconnecting into network. Some times device not getting connected. I can see in debugging the network key getting changed. 

I have attached sniffer data pls check and let me know.

Network key : ca fe ca fe ca fe ca fe ca fe ca fe ca fe ca fe

Following up this issue in the other thread.

no one responding since long time.

no one responding since long time.