DFRobot BOSON Starter Manual page 11

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Command:
This is the "tool section" of the stage. We need all kinds of tools to
give an excellent performance on the stage, and we can get more extra tools
in "Extensions" to support different hardware.
Script:
Here is the core of the "stage performance". All performances will be
acted under the instruction of "script". This is what we called graphical
Programming, easy and simple for beginners to understand. Just drag the code
blocks in the "Command" to here then you can program.
Code:
If you want to check the codes of the blocks in the "script", this is the right
place.
Serial Port:
How do you know whether you have made a successful
performance? -Interact with your audience. This is the place your audiences
give you their "opinion" about the performance. The downloading situation will
be displayed on there, so you can check whether your download is successful,
or if not, what's the reason. Besides, you can see the programs running here. The
serial port communication data will also be displayed. That is to say, if your
micro: bit board is connected with an external sound sensor, you can find the
related data here. This section also includes: serialport open/close, scroll display
open/close, clear output, baud setting, serialport input and output format
control.