Digi International Inc.
System and methods for wireless firmware upgrades using one-way broadcast transmissions

Abstract:

Methods and systems for wireless firmware upgrades are provided. In one embodiment, a system comprises: at least one master source radio and one or more client radio devices in wireless communication with the master source radio. The master source radio transmits a firmware image block broadcast to the client radio devices comprising sequentially transmitted firmware image blocks, wherein the master source radio transmits each block a plurality of times. Each of the plurality of sequentially transmitted firmware image blocks is transmitted as payload within a broadcast block, the broadcast block further comprising metadata associated with the payload. The client radio devices each include a firmware memory and a boot loader. The boot loader assembles a firmware image from the firmware image block broadcast and stores the firmware image into the memory. Transmission of the firmware image block broadcast is not controlled using feedback from the client radio devices.