FYI. There is a bug which makes the lcd don't work with the library in arduino.cc ide 1.6.6 and 1.6.7.

Please install the library from this Github repo:
https://github.com/johnrick...

What is the type and part number or source for the mating connector for the I2C connection to the display?

SOLVED!
I added pull-up resistors on the SCL and SDA lines.
Solved all issues.

Hi
How do i use this display with AtmelStudio7 on an atmega328pb-xplained? Open an arduino sketch with atmelstudio didn´t work. Thanks in advance.

if you mean to an external dc power supply, that did not help. the LCD has power. Is something wrong with the address?

Is this LCD compatible with Arduino Uno Wifi Rev2.? When I upload a sample LiquidCrystal_I2C/Hello world example nothing hapens.

Hello do you have the datasheet of the LCD? and not the datasheet of the driver chip. I want to know the operating temperature range of this LCD.

I just testing a sample as follows. But words was displayed but I can hardly see the words. What could have been the problem?

#include <wire.h>
#include <liquidcrystal_i2c.h>

LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x3F for a 16 chars and 2 line display

void setup()
{
lcd.init(); // initialize the lcd
// Print a message to the LCD.
lcd.backlight();

lcd.setCursor(0,0);
lcd.print("Hello world");
lcd.setCursor(1,1);
lcd.print("MICROBIT");
lcd.noCursor();
}

void loop()
{
}

Thank you this has worked. The lcd Module is connected only on A4 and A5 port of the Arduino? Is there a way to define other ports, because i already use them for an accelerometer?

i was able make it work but the contrast its so low you can bear it see it using microbit. i have tested on mind+ and i was able to make it work on make code using https://makecode.microbit.o... . i have the contrast into maximun

i tested on arduino works perfect. i tested using microbit and macqueen the textt its not shown. finally i did use the dfrobot driver expansion board for microbit and you can bear see the text written on the lcd its useless.

fyi if i power down the lcd from the expansion board and i power it again, i get some odd characters (not what i ment to write on the program) but with good contrast. but when i power on the microbit to initialize the lcd you can bear see what its written on the lcd.

oi have also used 2 different microbit to be sure its not something related to one board.

i have also powered with a 1amp charger to avoid powering issues and the problems continue

is there any recommendation?

https://uploads.disquscdn.c...

What softwares can I use to program the code?

Hi, what is the proper connection to the I2C communication interface (e.g., JST Jumper 4 Wire Assembly)? I wish to connect 4 wires assembly directly to it.

To avoid the confliction of I2C address with other I2C devices, such ultrasonic sensor, IMU, accelerometers and gyroscope, the I2C address of the module is configurable from 0x20-0x27. And its contrast can be adjusted manually.

I download the Arduino I2C 1602 LCD Library, but when run the HelloWorld example, the LCD only diplay the first letter.

Hi, I am currently having issues when connected to an Arduino Due, the LCD screen displays nothing at all.
Does any one have a solution for this please?

Any news related to the bug that affect newer versions of arduino ???

It will only show the first letter e.g. in Hello World - H only...

With arduino.org 1.7.x no bugs based on my test.

Of course, Romeo BLE is using Atmega328 as MCU, it is totally compatible.