Template:Sensor explain

Pins of the sensor：
- PIN1：GND
- PIN2：VCC
- General signal pins：
  - PIN3(IO1)：Digital signal/Analog signal
  - PIN4(IO2)：NC(void)
- Special signal pins：
  - IIC pin：IO1 is SDA, and IO2 is SCL
  - Soft serial pins：IO1 is soft serial port tx,and IO2 is soft serial port rx

TowardA sensor pins
- PIN1：GND
- PIN2：VCC
- PIN3(IO1)：Pin mode
- PIN4(IO2)：Pin mode

Microduino sensors cna communicate with core communication modules through being connected with Microduino-Module Sensor Hub.

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