User Manual

XBee® Wi-Fi RF Modules

Verifying the New Application

For an uploaded application to function correctly every single byte from the .ebin file

must be properly transferred to the GPM. To guarantee that this is the case GPM VERIFY

functions exist to ensure that all bytes are properly in place. The FIRMWARE_VERIFY

function reports whether or not the uploaded data is valid. The

FIRMWARE_VERIFY_AND_INSTALL command will report if the uploaded data is invalid. If

the data is valid it will begin installing the application. No installation will take place on

invalid data.

Installing the Application

When the entire .ebin file has been uploaded to the GPM of the target node a

FIRMWARE_VERIFY_AND_INSTALL command can be issued. Once the target receives

the command it will verify the .ebin file loaded in the GPM. If it is found to be valid then

the module will install the new firmware. This installation process can take up to 8

seconds. During the installation the module will be unresponsive to both serial and RF

communication. To complete the installation the target module will reset. AT parameter

settings which have not been written to flash (using the WR command) will be lost.

Things to Remember

• The firmware upgrade process requires that the module resets itself. Because of

this reset parameters which have not been written to flash will be lost after the

reset. To avoid this, write all parameters with the WR command before doing a

firmware upgrade.

• Because explicit API Tx frames can be addressed to a local node (accessible via

the SPI or UART) or a remote node (accessible over the RF port) the same

process can be used to update firmware on a module in either case.