Manual

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Result: pin 8 is connected to the touch module. Whenever the touch module outputs a high level,
the 5 * 5 dot matrix LED displays a bitter face, until the touch module outputs a low level, the 5 * 5
dot matrix LED displays a smiling face.
Microbit graphic programming
Supplement: there is a two lattice dial on the module. There are four combinations of dial dial dial,
namely 00, 01, 10 and 11 respectively. That is to say, the touch module can realize four touch modes
according to the combination of encoder. 00 and 01 will change the current level when touching the
module. The difference between them is that 00 means that when the module is powered on, the
module will start with output high level first, while 01 means that when the module is powered on,
the module will first start with output high level; 10 is that when touching the module, it will output
low level, otherwise it will output high level; 11 is when touching the module, it will output high power
Flat, otherwise output low level. It should be noted that because of the Unigrid capacitor on the
module, after modifying the touch mode of the module, disconnect the power supply to discharge
the module!