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• Add the support for reading the ultrasonic sensor in Mind+.
• Both the one-pin and two-pin ultrasonic sensors are supported.

Fixed the following bugs:

1. The SkillComposer cannot tune Nybble's eye colors.
2. After closing the color picker, The main window will cover the eye color window.
3. When changing the product to Bittle X, the Mainboard's version is not updated to BiBoard.

• Prompt warning to connect the battery power when opening the Calibrator and Skill Composer.
• Tune Nybble's behaviors.

• Allow changing the volume of BiBoard: use b0~10 to change the volume. b0 will mute the buzzer, while b will toggle mute/unmute. If the volume is set to 0 and muted, it will be set to 5 when unmuted.
• Allow the Firmware Uploader to factory reset the BiBoard.

• Fix the bug that after switching the voice module's language using the mobile app's customized button, the robot may not respond to new app commands.

• Add BiBoard V0_1 and V0_2 in the Firmware Uploader's board options.
• In OpenCatESP32, print the robot's messages to all connected ports.

• When exporting a skill from Skill Composer, automatically save it to /Users/{username}/.config/Petoi/SkillLibrary/. Note the .config is a hidden directory but can be visited in the terminal or through a specific view setting.
• Allow Mind+ to call multiple skills saved in the SkillLibrary.
• Add Bittle X as an explicit model in the Firmware Uploader of the desktop app.
• Fix bugs.

• Unify the format of the path string.
• Fix bugs.

• Fix bugs

• Include the creator information in the skill file exported from the Skill Composer.
• Fix bugs.