I need help in getting my display to work with my arduino. 

I bought 2.4" LCD display UART/SPI/I2C True Color 320x240 display (DS320240CIPS-61) in July and just now getting around to testing.  I am trying to add this to a new version of an IoT project for 1000's of deployments.

I placed some solder across the jumper (from the middle to i2c of jumper) on back of the display for I2C mode.

My arduino powered by USB from laptop.  The LCD display is powered from the 3.3Vout on the arduino.  

I installed the DigoleSerial library in my Arduino IDE v1.8.1.  I opened up an example script in library folder called TextLCDAdapterDemo.ino and changed the #define _Digole_Serial_UART_ to _Digole_Serial_I2C_.  Compiled and transfered to arduino.  

I power up the arduino, and all I get is a quick flicker of gray boxes and something that looked like colored Digole text/logo (very faint) and disappears.

I have no idea what to do next...

any help is appreciated.

Thanks

Jim

 

Script below (from library examples):

/#_________________NOTE _____________________

new version of lib will save you compiled code size for the sample

The size for 2 version(@Arduino 1.0.1):

      UART  I2C    SPI

OLD   8998  8988   9132

NEW   6966  7566   6354

------------------------*/

#define _Digole_Serial_I2C_  //To tell compiler compile the special communication only, 

//all available are:_Digole_Serial_UART_, _Digole_Serial_I2C_ and _Digole_Serial_SPI_

#include <DigoleSerial.h>

//--------UART setup

#if defined(_Digole_Serial_UART_)

DigoleSerialDisp mydisp(&Serial, 9600); //UART:Arduino UNO: Pin 1(TX)on arduino to RX on module

#endif

//--------I2C setup

#if defined(_Digole_Serial_I2C_)

#include <Wire.h>

DigoleSerialDisp mydisp(&Wire,'\x27');  //I2C:Arduino UNO: SDA (data line) is on analog input pin 4, and SCL (clock line) is on analog input pin 5 on UNO and Duemilanove

#endif

//--------SPI setup

#if defined(_Digole_Serial_SPI_)

DigoleSerialDisp mydisp(8,9,10);  //SPI:Pin 8: data, 9:clock, 10: SS, you can assign 255 to SS, and hard ground SS pin on module

#endif

#define LCDCol 16

#define LCDRow 2

 

int ptr;

const char a[] = "disp char array";

const char b = 'Q';

int c = 3456;

String d = "I'm a string";

float pi = 3.1415926535;

double lg10;

 

void resetpos(void) //for demo use, reset display position and clean the demo line

{

    mydisp.setPrintPos(0, 1);

    delay(2000); //delay 2 seconds

    mydisp.println("                "); //display space, use to clear the demo line

    mydisp.setPrintPos(0, 1);

}

 

void setup() {

    mydisp.begin();

    /*----------for text LCD adapter and graphic LCD adapter ------------*/

    mydisp.clearScreen(); //CLear screen

    //mydisp.displayConfig(1);    //set config display ON, 0=off

    mydisp.setI2CAddress(0x29);  //this function only working when you connect using I2C, from 1 to 127

    delay(1000);

    //mydisp.setLCDColRow(16,2);  //set LCD Col and Row, only time set up is OK

    mydisp.disableCursor(); //disable cursor, enable cursore use: enableCursor();

    mydisp.drawStr(4, 0, "Demo now"); //display string at: x=4, y=0

 

    //Test print function

    mydisp.setPrintPos(0, 1);

    mydisp.print(a); // display a char array

    resetpos();

    mydisp.print("display a char:");

    mydisp.print(b); //display a char

    resetpos();

    mydisp.print("int as DEC:");

    mydisp.print(c); //display 3456 in Dec

    resetpos();

    mydisp.print("as HEX:");

    mydisp.print(c, HEX); //display 3456 in Hex

    resetpos();

    mydisp.print("as OCT:");

    mydisp.print(c, OCT); //display 3456 in Oct

    resetpos();

    mydisp.print("BIN:");

    mydisp.print(c, BIN); //display 3456 in Bin

    resetpos();

    mydisp.print(d); //display String object

    resetpos();

    mydisp.print("float pi=");

    mydisp.print(pi); //display float of PI

    resetpos();

    mydisp.print("Pi6=");

    mydisp.print(pi, 6); //display PI in 6 Accuracy

    resetpos();

    mydisp.print("Pi*3=");

    mydisp.print(pi * 3, 6); //display PI time 3 in 6 Accuracy

    resetpos();

    mydisp.print("lg5=");

    mydisp.print(log(5), 8); //display log(5) in 8 Accuracy

    resetpos();

    for (uint8_t j = 0; j < 4; j++) //making "Hello" string moving

    {

        for (uint8_t i = 0; i < 10; i++) //move string to right

        {

            mydisp.setPrintPos(i, 1);

            mydisp.print(" Hello ");

            delay(100); //delay 100ms

        }

        for (uint8_t i = 0; i < 10; i++) //move string to left

        {

            mydisp.setPrintPos(9 - i, 1);

            mydisp.print(" Hello ");

            delay(100);

        }

    }

    delay(2000);

    mydisp.clearScreen();

    mydisp.print("Turn Off backlight after 2 seconds");

    delay(2000);

    mydisp.backLightOff();

    delay(2000);

    mydisp.clearScreen();

    mydisp.print("Turn On backlight");

    mydisp.backLightOn();

    mydisp.setPrintPos(0, 1);

    mydisp.print("Enjoy it! www.digole.com");

    mydisp.enableCursor(); //enable cursor

}

void loop() {

}

This line:
mydisp.setI2CAddress(0x29);  //this function only working when you connect using I2C, from 1 to 127
Changed the I2C address on the display.

You need to modify this line in code:
DigoleSerialDisp mydisp(&Wire,'\x27');  //I2C:Arduino UNO: SDA (data line) is on analog input pin 4, and SCL (clock line) is on analog input pin 5 on UNO and Duemilanove

to the newer I2C address:

DigoleSerialDisp mydisp(&Wire,'\x29');  //I2C:Arduino UNO: SDA (data line) is on analog input pin 4, and SCL (clock line) is on analog input pin 5 on UNO and Duemilanove

and then recompile and reload the code to Arduino

 Thank you for your quick reply. 

I changed the line as you described to '\x29' and recompiled.  No change.

I also commented out the line mydisp.setI2CAddress(0x29) using the new address above and recompiled.  No change.

I also tried '\x27' with the mydisp.setI2CAddress(0x29) commented out. I also tried '\x27' with the mydisp.setI2CAddress(0x27) and recompiled and no change.

No combination works.  I understand they need to be matching addresses :)

What is the address supposed to be for the device?  What do I do now?

Thanks and I look forward to your reply.

 

 

 

 

The I2C address will show on the screen when the display powered up, if not, unsolder the jumper, then power the display on (UART), then solder the jumper, then power the display on (I2C).

The display always show the new config data when the communication mode is different than last time of power on.