As from firmware 3.01, all BL-521's can have their firmware upgraded in the field. BL-521's with firmware earlier than 3.01 will have to be returned to Brainboxes for upgrading. The firmware version is displayed on the Configuration Menu screen when accessed from Hyperterminal Go to the following webpage for the latest details and downloads for your BL-521/730: BL-521 Information

This FAQ Applies to the following Brainboxes Product Ranges: