Previous Thread was locked.
http://www.8052.com/forum/read.phtml?id=93465
Just some updates from the previous thread.

Not enough time to test out the RS485 version.

So implemented a 2 UART situation.

Device A --> TX/RX --> Device B --> TX/RX --> ... --> Device X ...

Anyway, tested and works great. Able to link up and do communication with at least 42 devices, could be more.

So, now my problem is to do firmware upgrading. At the moment, need to physically disconnect the link and then update board by board.

Currently working on how to do firmware upgrading (flashing) using this method. May need more help from Eric and Michael on this later. Thanks for all the help previously.