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Questions tagged [display]

A visual output device typically capable of displaying text and/or graphics. Can include various technologies, such as LCD, OLED, and TFT.

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Adding oled library stops sound from working?

my code is using keypad library and oled display and piezo element. Without the oled code added everything works just fine. as soon as I add code for that, sound stops working. doesn't even call the ...
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1answer
2k views

need help hooking up an oled display

recently i bought this oled display . http://www.wvshare.com/product/0.96inch-OLED-A.htm how can i connect it with arduino . Driver Chip is SSD1306 . Supported Interface are 3-wire SPI, 4-wire SPI, ...
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2answers
723 views

Custom sleep function for Nextion

I have a Nextion 7 inch enhance type display. I have enabled sleep using thsp = 120 and thup = 1 line of code. Now display become sleep mode after 2min, if there is no any touch event. But, this ...
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1answer
32 views

What image formats are accepted for displays?

Sorry if there is information missing, im new to the topic. I have an ESP32 connected to a Waveshare 7,5" RWB display, and i can display images by converting them to .xbm and including the hex code ...
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1answer
61 views

Increase or decrease the brightness of Nextion display

I have a nextion display. I want to implement this issue of it. Start the program. If for example I don't touch the display for 15seconds, it should to turn off its brightness. If I touch the screen ...
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1answer
36 views

How to make a custom character on a TFT LCD display? (128x128)

I'm currently using the ucglib library. I'm new to arduino and I'm wanting to simply display a lcd smiley I made with the byte generator. I still have some of the original 'font hello world' stuff ...
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2answers
120 views

How to display float variables on oled display (0.96'')

I have a similar problem than the discussed here : How to display variables on 0.96" OLED with u8glib library? I'd like to know how can I show float variables in place of int variables. What ...
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0answers
29 views

TFT ST7735 Library - Can't Display Bitmap

Using a cheap Chinese ST7735 type 128x160 display with the TFT_ST7735 library (https://github.com/Bodmer/TFT_ST7735). I'm using an Arduino Mega 2560, hardware SPI. Example works perfectly, ...
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1answer
35 views

I´m trying to make a kind of videogame with Arduino UNO

it´s a school project, but I'm having some problems to create a menu selection. In the LCD, all the character are overwriting, I'm a beginer, so i dont have any idea of what i was doing wrong (ps.: ...
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1answer
431 views

Reading RAM from SH1106 OLED Controller through I2C

Summary: I'm having trouble with writing a program to get RAM data from an SH1106 OLED controller via i2c. In the first part of the question I've written the assumptions I've made to get informations ...
-1
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1answer
36 views

OLED not updating display

I'm trying to connect a GPS unit (GY-GPS6MV2) and an OLED screen as in the diagram below (green connector is GPS; VCC, RX, TX, GND left to right): Here's the code I've come up with: #include <...
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2answers
558 views

7 segment display blinking

I want to display the DHT22 temperature and humidity sensor in a 3 digit 7 segments display. It's always showing the sensor value and after 2 or 3 sec the display turns off, and then the display ...
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1answer
95 views

How to stop OLED flicker when using SSD1306Ascii.h?

Why does the OLED display flicker when using the SSD1306Ascii.h library? The Adafruit library does not have this issue, but I've been told uses a lot of memory and so I'm trying to use Ascii to ...
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1answer
788 views

Writing a value to 7-segment max7219 displays

I am new to arduino and I am trying to build an interface for my flight simulator. I am using a plugin for the simulator software which returns a float variable to my arduino, which I then want to ...
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3answers
883 views

Wemos: 16x2 display doesn't show anything

I connected a 16x2 LCD display to a Arduino Uno. Then I tested a "Hello, Word" code and it works perfect. Now I want to do the same with a Wemos D1 Mini but it doesn't work. Here the Wemos is not ...
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2answers
2k views

Why doesn't my 7 segment update every second like in the program?

I used sevseg.h library to write numbers to my 4 digit seven segment. The display should update every second with the current time since program started running. This is my code so far: #include <...
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1answer
25 views

How to detect V-SYNC on the SparkFun MicroView?

Is there a way to detect the start of the OLED screen refresh cycle (V-SYNC) on the SparkFun MicroView? There is no code for this functionality in the Arduino library; in fact it looks like the ...
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0answers
63 views

Using a 122x32 LCD display with u8g2

I recovered a 122x32 graphic LCD display, its reference is NMTB-S000087FYHSAY-04. Here are some pics It was retrieved from a completely rusted object, but the screen seems to work. It is a 122x32 ...
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0answers
79 views

DA8620 8-Bit Parallel OLED with Arduino

I have had a 2.4” transparent OLED on my desk for a while now and think now I have a years more experience, I can attempt hooking this up to an Arduino again. My interest was sparked when I realised ...
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1answer
434 views

Looking for light-weight Arduino OLED library that supports text and bitmaps

I'm trying to incorporate a screen into my Arduino code which is quite large already. The Adafruit SSD1306 library is overly large and has a lot of unnecessary things in it. I've found the ...
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2answers
30k views

How to display variables on 0.96" OLED with u8glib library?

I have Arduino Uno and 0.96" I2C Oled 4 Pinned display. These are my Arduino codes: #include "U8glib.h" U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE); // VDD=5V SCL=A5 SDA=A4 int a = 10; void ...
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0answers
5k views

Making CS (chip select) work in SPI (for and SD card and OLED)

I'm working on a project that will log data to an SD card and display a user interface on an OLED. The SparkFun OLED breakout was super easy to set up. I was also able to get the SD-Card library ...
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0answers
24 views

TM1637Display is not updating on loop

Alright so I've been trying to update/change the number on the display during a loop, but nothing really happens. It doesnt change/update, the value is always exactly same. #include <TM1637Display....
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1answer
73 views

Which Arduino microcontrollers are able to drive a parallel 8-bit ILI9341 display at 320x240@60fps with DMA or extra CPU core or both and how?

I've always wanted to make my own game console. I don't know why the existing Arduino game consoles have this issue with framerate when a 2006's Sony handheld PC had 1GB of RAM and an Intel CPU ...
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0answers
25 views

TouchScreen GUI Reference Guide Help

Recently I have gotten some Touchscreens to add to my projects and I am very excited to use them. However, I am not sure where I can find a guide to help me create my own GUI with the touchscreens. ...
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2answers
231 views

Waveshare 1.54 inch ePaper display requires 5Vs from Arduino Uno

I have an Arduino Uno and I would like to attach a Waveshare 1.54“ display (red, black & white) to it. All the specs tell me that it consumes 3.3 V which I have readily available on the Arduino ...
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0answers
37 views

Arduino 3.5" TFT Display going blank after sending data through I2C

I'm trying to use I2C to send and receive commands between an Arduino UNO R3 and an Arduino Mega R3, with a 3.5" TFT display connected to the Mega. I have verified that my display is fully functional ...
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3answers
551 views

ILI9163C screen not working properly

I've just tried out my new TFT_ILI9163C display with TFT_ILI9163C library but I'm having an issue with it. The graphics has moved down (the "hello world" should be in the top left) and the leftover ...
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1answer
82 views

HD44780 DDRAM addressing on the second line

I write bytes to HD44780 display DDRAM to display characters and it works weird on the second line. I use 16x2 model and I write "0123456789" string from address X on. According to the datasheet: ...
4
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2answers
523 views

Image Breakdown

I've been trying to figure out a way to store an image on the Arduino, and I couldn't figure it out. What I've been trying to do with this image is the following: Test that the arduino has the image ...
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4answers
3k views

Running a 7 pin OLED with 4 pins (I2C)

I have an OLED with this 7 pin pinout: I want to use an existing code i found that makes use of U8Glib. But in the example, use uses 4 pins to control the OLED via I2C. This is the pinout he uses: ...
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2answers
1k views

Arduino freezing with OLED display

I have a 0.96" OLED display hooked up to my Arduino Mega via SPI. I installed the Adafruit library and GFX library. I can run through the little graphical demo from Adafruit just fine as well as ...
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3answers
10k views

How to show the º character in a LCD?

I have a 16x2 LCD and I want to show a temperature: 23 ºC. But the º symbol is not properly shown. It shows a strange character instead of the º symbol .
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2answers
71 views

HD44780 display incorrectly black-on-blue instead of white-on-blue

I have a generic HD44780 compatible 16x2 LCD display, with an already soldered on PCF8574 module. Its backlight is blue, and the characters are supposed to be white (on blue). It is connected to a ...
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1answer
50 views

Can't swipe between RTC and some event

Some ideas please? I'm stuck and also don't judge me for how i wrote the code. I'm new into coding and still learn. So, the idea is that i want to display data and clock on lcd but when the lamp is on ...
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1answer
104 views

Mirror text on 8 way 7219 [closed]

While this was seemingly answered in another forum question, the answer given of using an alternative library of... #define HARDWARE_TYPE MD_MAX72XX::FC16_HW was tested and resulted in a worse ...
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1answer
588 views

Problem to display Ntp time on an oled using U8G2 lib

So I have this code to get ntp time and display it on serial port. But I want to display it on a 1.30 inch I2C oled with a SH1106 controller using the U8G2 library. The only problem is I don't know ...
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2answers
62 views

7 LED Number Display

I need to write a string of number such as 1234567 on a 7 LED display. For example 1 will be lit up on display for 0.5 seconds, it will turn off then 2 will light up and so on. In the end I need to ...
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1answer
157 views

16 X 2 LCD display blank with Arduino Uno

So I am following this tutorial to make my arduino display hello world and millis(), I got it to work for a minute, but then it stopped updating the milliseconds, and when I pushed the reset button it ...
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0answers
137 views

Arduino OLED Display strange output

I am trying to use the Adafruit SSD1306 lib with my OLED display for arduino but I've encountered an strange error. I am using the default example "ssd1306_128x64_spi" but the display is odd, the ...
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0answers
165 views

What am I missing? ST7735 TFT white screen

I followed this guy's guide with regards to wiring, etc., and all I seem to be getting is a white screen, as shown in these pictures. Is there an issue with the guy's guide, I'm missing or there is an ...
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0answers
253 views

How can I put this display SSD1306 to sleep?

I have built a kitchen timer and it is supposed to spend most of its life in sleep mode in order to save power. I am using the SSD1306Ascii library (SPI) by William Greiman. In this library I have ...
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3answers
276 views

One free pin. Need to display output for the user?

I'm working with lightblue bean. I have a device that writes data to an SD card on a long button press and switches what will be written (from a list of 5 items) on short button press. The output, ...
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1answer
36 views

Displaying characters as bitmaps

I have resorted to creating bitmaps for each number and a few letters for a 128x64 Oled module. This was to save memory and get around limitations of libraries such as the u8glib. If I had linux I ...
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1answer
562 views

I need help with U8GLIB library

I have a project which uses a 128x64 oled display. I have to use the U8GLIB as the available displays change from SSD1306 to SSH1106 depending on when you buy it which that library covers both ...
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0answers
159 views

White squares LCD display

for a school project I need to program a display. I've got in almost working. I made a setup screen in the setup() that just says our groupname and the name of our project for 8 seconds (this works ...
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0answers
72 views

Arduino nano -> 74HC595 -> LCD display

Greeting to all, Newbie in the contraption above (Arduino nano -> 74HC595 -> LCD display); I would like some help from the experts. I connect the 74HC595 to the LCD display using the 4 wires as ...
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1answer
119 views

Serial.print prints but lcd.print does not

The following code reads a txt file from a SD card, finds the corresponding character and prints the next 12 characters: ... char temp; byte who = random(1, 13); // 1 to 12 temp = ...
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4answers
5k views

Can't get 4 digit 7 segment display to show different values

I'm an Arduino newbie having problems getting a 4 digit 7 segment display to work. The display is connected to a 74HC595 and the setup is from the elegoo tutorial 28 (I think it is download only). I ...
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1answer
1k views

SSD1306 allocation failed when adding a constant

I am trying to get this code working: #include <Button.h> #include <SPI.h> #include <Wire.h> #include <Adafruit_GFX.h> #include <Adafruit_SSD1306.h> #include <RTClib....