Base Shield V2


enter image description here As an expansion board, Base Shield v2 has many Grove connectors, making it convenient for you to use Grove products together. And It is compatible with a series of Arduino products.


Click to get more info about Grove System.


  • Power Compatible: Every Grove connector has four wires, one of which is Vcc. However, not every micro-controller main board needs a supply voltage of 5V, some need 3.3V. That’s why we add a power switch to Base Shield v2. In this way, you can adjust the voltage of Vcc via this switch, making sure the voltage of Vcc is the same as supply power of the main board.

So While using Arduino UNO with Base Shield v2, please turn the switch to 5v position; While using Seeeduino Arch with Base Shield v2, please turn the switch to 3.3v.

  • Board Compatible: The number of pinout is the same as that of Arduino UNO R3.

Added SDA and SCL pins that are near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board. In future, shields will be compatible with both the board that uses the AVR, which operates with 5V and with the Arduino Due that operates with 3.3V. The second one is a not connected pin, that is reserved for future purposes. ---- According to Arduino UNO


If using Base Shield v2 with Seeeduino V3, please solder the pads, P1 and P2.

Grove connectors: Base Shield v2 has sixteen Grove connectors.

Specification Name Qty
Analog port A0/A1/A2/A3 4
Digital port D2/D3/D4/D5/D6/D7/D8 7
UART port UART 1
2C port I2C 1
  • Dimension: 2.1 * 2.7 inch
  • LED indicator: The Green LED would be lighted up while powering.


We have produced a lot of extension board that can make your platform board more powerful, however not every extension board is compatible with all the platform board, here we use a table to illustrate how are those boards compatible with platform board.


Please note that “Not recommended” means that it might have chance to work with the platform board however requires extra work such as jump wires or rewriting the code. If you are interested in digging more, welcome to contact with

Click to see full picture


We have used Grove - LED and Grove - Button with Base Shield v2. All Grove products have Grove connectors, and can be plugged onto Base Shield directly.

enter image description here

 The circuit:
* LED attached from pin 3 to ground
* Button attached to pin 2 from +5V
* 10K resistor attached to pin 2 from ground
* Button Control An LED

const int button = 2;       // the Grove port No. you attached a button to
const int LED    = 3;       // the Grove port No. you attached an LED to
void setup()
    pinMode(button, INPUT); //set button as an INPUT device
    pinMode(LED, OUTPUT);   //set LED as an OUTPUT device
void loop()
    int btn = digitalRead(button); //read the status of the button
    digitalWrite(LED, btn);


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