The firmware upgrade tool usually updates your device to the latest available firmware version. If you require to downgrade your device to a previous firmware there are two methods to achieve this.
Here you can download Pycom firmwares. Note that these are all available in the Pycom Firmware Update tool.
Prior to version
1.16.0.b1the firmware for modules with LoRa functionality was frequency specific. From
1.16.0.b1and onward, the firmware is region agnostic and this can either be set programatically or via the config block (see here).
As of version
1.12.0.b0 of the firmware update tool, you can now provide a
.tar.gz archive of the firmware you wish to upload to the board. Check out the procedure here
You can also use the CLI version of the update tool to downgrade your device. Will need to get a
.tar.gz archive of the firmware you wish to upload to the board. Then run the following commands:
$ pycom-fwtool-cli -v -p PORT flash -t /path/to/firmware/archive.tar.gz