Specification:

The module is compatible with Arduino UNO R3 sensor expansion board substrates, electronic building blocks related to functional modules and compatible with Arduino UNO R3 bridge connection between the motherboard. SPI interface board leads the motherboard, UART interface, the part of the digital interface and analog interface, easy DIY enthusiasts, arduino interactive designers will soon be quickly attached to the Arduino module on the motherboard, accelerate project development progress.

Expansion board features are as follows:

1. For Arduino UNO R3, Catduino and other compatible motherboard.
2. on-board reset circuit, power supply and reset the indicator.
3. can continue to stack additional features Arduino expansion boards.
4. Operate voltage:5V

Pin interface leads Resources:
1. SPI interface: two SPI interfaces shared SPI bus, chip select pin is not the same, you can enable the board to mount two SPI interface module;
2. Digital Interface: 7, each interface contains two signal lines and two with the power cord, can be articulated 3-wire or 4-wire module;
3. UART interface: TTL serial port, serial port module can be mounted.
4. Analog interface: 2, each interface contains two ADC signal and two with the power lines, analog signal output can be mounted sensor module can also be used as a normal digital interface;
5. I2C interface: 4, which can mount four addresses are not the same as the I2C interface module can also be used as an analog interface, the common digital interface (non-I2C interface use, the interface is not reusable);
6. Reset button: Press the touch of a button the side, making the reset operation more convenient;
7. Indicator: Red LED is reset LED, reset the light; Green LED for the power indicator, the motherboard provides a 5V power supply is normal that is lit;
8. Power Interface: from the motherboard 5V, direct supply various interfaces described above;