DFR0013

    IIC to GPIO Shield V2.0 SKU: DFR0013  Contents       1 Introduction 2 Specification 3 Board Overview 4 Tutorial 4.1 Requirements 4.2 Connection Diagram 4.3 Sample Code 5 Library Explanation 5.1 Library Functions 5.2 Pin map 6 FAQ Introduction Having troubles with inadequate digital I/O when using Arduino with robots or interactive media? This IIC to GPIO shield helps you solve the problem, Arduino has only two data lines (SCL-Analog PIN5, SDA-Analog PIN4) and IIC can transfer I / O module communication, to convert the 16 digital IO ports, read-write. 8 simultaneous parallel modules, each module can be set to address. Specification      Module power supply: +5 V 16 Digital I/O port comes with internal pull-up Can be set to eight addresses (address range of 0x20 ~ 0x27) 8 modules simultaneously in parallel (IIC bus need to pull together) Module Size: 56x53mm (2.21x2.08 in) Board Overview   Plug = 0 Unplug = 1 A2 A1 A0 IIC 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 Tutorial Requirements  Hardware DFRduino UNO x1 IIC to GPIO Shield V2.0 x1 Button module LED module  Software Arduino IDE V1.6.5 Click to Download Arduino IDE from Arduino® Connection Diagram Sample Code In this section, we will use an Arduino library written by nicoverduin Github Library. About Library installation. 1 #if defined(ARDUINO) && ARDUINO >= 100 2 #include "Arduino.h" 3 #else 4 4 #include "WProgram.h" 5 #endif 6 7 #include "clsPCA9555.h" 8 #include "Wire.h" 9 10 11 PCA9555 ioport(0x20); 12 13 void setup() 14 { 15 ioport.pinMode(7, OUTPUT); //Set GPIOs pinMode LED 16 ioport.pinMode(8, INPUT); //Button 17 } 18 19 void loop() 20 { 21 if (ioport.digitalRead(ED8) == LOW) { 22 23 ioport.digitalWrite(7, LOW); //Turn off Led } 24 25 if (ioport.digitalRead(ED8) == HIGH) { 26 27 ioport.digitalWrite(7, HIGH); } 28 29 } Library Explanation Library Functions    pinMode() same as standard Arduino digitalRead() same as Arduino digitalWrite() same as Arduino //Turn on Led Pin map P0.0~P0.7 map to GPIO 0 ~ 7 or ED0 - ED7 P1.0~P1.7 map to GPIO 8 ~ 15 or ED8 - ED15 FAQ There are no questions about this product yet. If you have any problems or suggestions, you are welcome to email us or post on the DFRobot forum! For any questions/advice/cool ideas to share, please visit the DFRobot Forum. Powered By DFRobot © 2008-2017