DFR0334

  GPIO Shield for Arduino V1.0 SKU: DFR0334 Contents      1 Introduction 2 Specification 3 Board Overview 3.1 PCA9555DB IIC Address 3.2 VCC Jumper Caps 4 Tutorial 4.1 Requirements 4.2 Connection Diagram 4.3 Sample Code 5 FAQ Introduction An Arduino UNO has a limited number of GPIO pins - but what if it is not enough? The GPIO expansion shield specifically designed for Arduino UNO-type boards. This shield greatly expands the GPIO resources to 36 pins in total, including 14 digital pins, 6 analog pins and 16 I2C pins. In addition digital and analog pins include the DFRobot "Gravity" interface, giving you in-line power and ground pins and saving you having to connect millions of jumper wires for a single sensor. Specification   Arduino Digital Pins: 14, D0 - D13 Arduino Analog Pins: 6, A0 ~ A5        IIC - GPIO Digital Pins: 16, P0.0 ~ P0.7; P1.0 ~ P1.7 IIC Port: 1 UART Port: 1 Power Supply: 5 VDC / External Power Supply (jump cap switch) Reset Button: 1 Dimensions: 53.34 x 54.48 mm / 2.1 x 2.14 inches Weight: 30g Board Overview NumName Description 1 External Power 5 VDC 2 VCC Jumper Caps Choose to power from board or shield external power 3 PCA9555DB IIC Address Setting Set PCA9555DB I2C Address 0x20~0x27 4 Arduino Digital I/O Pins D0~D13 5 Arduino Analog input Pins A0~A5 6 IIC to GPIO Digital Pins P0.0~P0.7; P1.0~P1.7 7 IIC Port IIC Communication 8 UART Port UART Communication PCA9555DB IIC Address  Config PCA9555 IIC Address with A0~A2 Jumper Caps (0x20~0x27) Plug = 0 Unplug = 1 A2 A1 A0 I2C Address 0 0 0 0x20 (Default) 0 0 1 0x21 0 1 0 0x22 0 1 1 0x23 1 0 0 0x24 1 0 1 0x25 1 1 1 0x26 1 1 1 0x27 "D": represents digital signal "A": represents analog signal One of the biggest benefits of the I/O expansion shield is more power and GND pins, allowing you to connect more sensors. * Green: digital signal * Blue: analog signal * Red: VCC * Black: GND  This is DFRobot's Gravity Interface. Digital and analog connections are easy to recognize and support most of DFRobot's I/O expansion shields and modules. Search "Gravity" in the DFRobot store to find compatible modules. VCC Jumper Caps There are two Jump caps, you can change the position of two caps for the different VCC power input. See the following schematic for details: The middle pin is the shield VCC pin. If you connect caps on the left side, VCC pins get power from the shield external port; If you connect caps on the right side, VCC pins get power from the board 5V port; This is suitable for some applications that require greater current. Tutorial Requirements  Hardware DFRduino UNO x1 GPIO Shield for Arduino x1 Button module LED module  Software Arduino IDE Click to Download Arduino IDE from Arduino® https://www.arduino.cc/en/Main/Software Connection Diagram Sample Code In this section, we will use an Arduino library written by nicoverduin Github Library. About Library installation. https://github.com/nicoverduin/PCA9555 https://www.arduino.cc/en/Guide/Libraries#.UxU8mdzF9H0 #if defined(ARDUINO) && ARDUINO >= 100 #include "Arduino.h" #else #include "WProgram.h" #endif #include "clsPCA9555.h" #include "Wire.h" PCA9555 ioport(0x20); void setup() { ioport.pinMode(8, OUTPUT); //Set GPIOs pinMode LED ioport.pinMode(15, INPUT); //Button } void loop() { if (ioport.digitalRead(ED15) == LOW) { ioport.digitalWrite(8, LOW); //Turn off Led } if (ioport.digitalRead(ED15) == HIGH) { ioport.digitalWrite(8, HIGH); } } //Turn on Led FAQ For any questions/advice/cool ideas to share, please visit DFRobot Forum.       Powered By DFRobot © 2008-2017