newfeatures:
1) Bootloader 2.4 is added.
2) Recovery firmware is added with possibility of manual (UPGRADERC) and automatic updating.
3) Recovery firmware supports removing scripts of old and new firmwares.

corrections:

annotations:
This firmware is designed only for upgrading a bootloader to version 2.0 and for upgrading a firmware from version 32 or lower to version 34 or greater.
Before updating the bootloader, make sure that the device is connected to an external power source with a voltage of at least 8V.
1. Send the UPGRADEBL command. A 4-digit code will be sent in response.
2. Send the UPGRADEBL command with the code received in the previous step.
3. The device will reboot and the bootloader will be updated.
4. Upgrade to firmware 34.0 or greater.

Revision 14
Commit SHA hash 8369995f 
