CC2530: Z-Stack 3.0 doesn't rejoin coordinator

When you download and debug from IAR, make sure IAR debug setting doesn't erase Flash of CC2530. Otherwise, network information on CC2530 will be wipe out.

I already checked that. Yet this problem still exists. How else can I fix this?

I suggest you to set a breakpoint on "bdb_StartCommissioning(BDB_COMMISSIONING_REJOIN_EXISTING_NETWORK_ON_STARTUP);" in UI_Init and step into to see what happens.

I set a breakpoint on that line and when it's hit, Ubiqua doesn't show a “NWK rejoin request". I hit F5 to continue, but still no rejoin request. I've tried everything I possibly could. I've messed around with the code, but it didn't fix the problem. What do you suggest I try?

When you download and debug your code in IAR, do you uncheck "Erase flash"?

I did uncheck “erase flash".

Do you enable NV_RESTORE?

I did enable NV_RESTORE.

I want the End Device to join or rejoin the coordinator at startup (not pressing any buttons). What code can achieve that?

You should call bdb_StartCommissioning(BDB_COMMISSIONING_REJOIN_EXISTING_NETWORK_ON_STARTUP);

YOu can use bdb_StartCommissioning(BDB_COMMISSIONING_MODE_NWK_STEERING).

How do I put this in an if statement?

if( "already connected to a coordinator" ){
bdb_StartCommissioning(BDB_COMMISSIONING_REJOIN_EXISTING_NETWORK_ON_STARTUP);
}
else if( "not connected to any coordinator" ){
bdb_StartCommissioning(BDB_COMMISSIONING_MODE_NWK_STEERING);
}



Note: I tried doing the below methods and they didn't allow the end device to rejoin the network. Please let me know if this may have caused the problem for not rejoining?

bdb_StartCommissioning(BDB_COMMISSIONING_REJOIN_EXISTING_NETWORK_ON_STARTUP |
BDB_COMMISSIONING_MODE_NWK_FORMATION |
BDB_COMMISSIONING_MODE_NWK_STEERING |
BDB_COMMISSIONING_MODE_FINDING_BINDING);

And

bdb_StartCommissioning(BDB_COMMISSIONING_REJOIN_EXISTING_NETWORK_ON_STARTUP);
bdb_StartCommissioning(BDB_COMMISSIONING_MODE_NWK_FORMATION |
BDB_COMMISSIONING_MODE_NWK_STEERING |
BDB_COMMISSIONING_MODE_FINDING_BINDING);

You can put it in application init function.

I wanted to know what parameters to put in the "if statement". What should I put in there?

Is there any value that is stored into the end device's memory that indicates it's connected to coordinator?

I found a solution as to why the device couldn't reconnect back to the coordinator and it's in the post: e2e.ti.com/.../2278650. I really appreciate all your help Yikai. Thanks a lot!

Cheers!