Analog pin voltage readings seem to depend critically on the voltage of the power supply to the Arduino.
模拟管脚电压读数紧密取决于Arduino的供电电压。
When a time-out occurs or the input supply is removed, the CHRG pin goes high impedance.
当发生超时或输入电源被拿掉，该chrg引脚变高阻抗。
The COM port 9-pin could not be set to VCC (5V power supply). Please check your cable or connected equipment.
不能将COM端口的第9 针脚色或者为VCC （5V电源）。请检查该COM接口的连接电缆及与之连接的设备。然后复位该设备或确认在工程的脚本设置中设置了5V电源。
The COM port 9-pin could not be set to VCC (5V power supply). Please check your cable or connected equipment.
不能将COM端口的第9 针脚色或者为VCC （5V电源）。请检查该COM接口的连接电缆及与之连接的设备。然后复位该设备或确认在工程的脚本设置中设置了5V电源。
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