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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how to connect a 4.3" tft touchscreen lcd with arduino UNO using a FT800 driver through SPI protocole?

i bought a 4.3" tft touchscreen LCD and a ft800 driver to display my arduino UNO outputs using SPI protocol on it but i have no idea about pinouts also no clue about which libraries i should use to ...
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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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18 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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28 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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1answer
31 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: ...
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49 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
69 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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2answers
59 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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55 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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104 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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92 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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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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132 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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1answer
33 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
281 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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2answers
298 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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116 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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64 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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83 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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1answer
734 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....
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1answer
29 views

LCD Identification FPC-JG00467-01B SR36 [closed]

I salvaged an old LCD from a calculator (Texas Instruments) and I want to interface it with a microcontroller (preferably an Arduino). I‘ve searched the whole internet but I simply can‘t find any ...
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149 views

Frequent ON OFF in SSR

I am working on a project on Arduino OLED MAX6675 thermocouple and SSR for my oven. My problem is when my SSR goes in LOW or HIGH state it turn ON and OFF several times before going to permanent HIGH ...
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2answers
375 views

7 segment display blinking

i'm not a professional in arduino code, when i want to display the DHT22 temperature and humidity sensor in 3 digit 7 segments , always the display show the sensor value and after 2 or 3 sec the ...
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1answer
40 views

Adjustable temperature [closed]

How can I make a project where I can adjust a temperature with buttons and a display and if the temperature is higher than that I set, a led turn on ?
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168 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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1answer
294 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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1answer
236 views

Reading text from sd card is returning weird characters?

I have an ebook which is converted to a .txt file saved on an sd card which is connected to the arduino. I'm trying to display the words from the book on a 16x2 lcd display on word at a time. It works ...
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3answers
197 views

Need help with a program for a button to change the display on an OLED display

So I am programming an OLED display from my Arduino Uno. I am trying to have a button that switches the different words on the display. (The words are just placeholders for programs as of now.) My ...
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1answer
46 views

Can I call functions from a different sketch? [closed]

I am a beginner at programming with Arduino and I am unsure on how can I call functions (such as, getData()) for the touchscreen LCD to display that data. The purpose of my device would be to listen ...
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1answer
62 views

Arduino code to run 2 thing simultaneously [closed]

I am making a project for my college in which I need to measure the rpm of the motor and show the real-time clock on the 128x64 GLCD simultaneously but when I run the project it only shows one thing ...
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1answer
92 views

1.54 e-ink without driver [closed]

i wan’t to know if is possible to use this raw e-ink display with arduino. if it’s possible to directly connect cables from this ribbon cable to arduino without any driver pcb and control it with 3 ...
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1answer
250 views

7-Segment, 3-digit display not displaying correctly

I have written the code that should work, but for some reason the numbers do not display correctly. When I choose to display 3 times the same number it works correctly (so pin connections are correct) ...
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85 views

Waveshare Display on ESP32 has weird graphic glitches

I am trying to pass an image to the display through the GxEPD module. I tested the display and its working fine with an example sketch. I am using a WEMOS LOLIN32 and a 7,5" B/W Waveshare display. ...
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106 views

Strange things happening with Arduino PROGMEM

I am currently working on a display library. The font should be stored in PROGMEM. The code looks something like this: unsigned int i = 0; Serial.println(pgm_read_byte(&font[1]),HEX); unsigned ...
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76 views

Arduino IDE Test-Sketch for 7,5" E-Paper not working

I have a LOLIN32 and want to connect it to a 7,5" Waveshare E-Paper. I select the GxEPD_SPI_TextExample and select the display class and then upload it. I do not get any errors, but the display simply ...
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2answers
376 views

How can I declare global array with its length stored in EEPROM?

I am working with Arduino UNO connected with BV4612 display. I am working on a simple code that controls several water pumps. Each pump has several modes it can run in. I store these modes in an array....
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716 views

SSD1306 - Is there a way to scroll a certain number of pixels only?

For a hobby project, I am trying to make some sort of little game with an ATtiny85 and an SSD1306 OLED display, mostly to see how much I can do with the least hardware possible. Something like Captain ...
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1answer
132 views

SH1106 - Transferring long buffer via SPI

I am using an SH1106 and am creating my own driver for it. Nearly everything is doing great with about 2/3ms send time using transfer16. I did notice however that I can use transfer with a buffer and ...
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1answer
347 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 ...
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1answer
522 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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1answer
231 views

SD begin affecting OLED display

Okay, I'm using u8g2 library for my OLED display. After calling SD.begin(4) function, I cannot display anything on my OLED. I'm using U8G2_SH1106_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ ...
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1answer
3k views

SSD1306 / U8glib display fonts and commands

I cannot seem to find any reference for the SSD 1306 or U8glib display font library or any command reference, like all the options for display() etc. For my fonts I been going into the utility folder ...
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2answers
756 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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1answer
40 views

Drive graphics on iphone using headphone jack [closed]

I want to have user controlled animated cartoon eyes on a puppet that I have been commissioned to build. Can I use an Arduino to drive graphics via the headphone jack on an iPhone or Android? I am a ...
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2answers
101 views

Less hardware dependent development?

I'm working on a little Arduino game project that uses neopixel strips as a display. Uploading every code change to the Arduino and testing it on the LEDs is slow and drains hardware lifetime. ...
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123 views

Adafruit FT6206 controller won't start after unrelated code changes

I am using an Adafruit HUZZAH32 Feather with the ESP WROOM32 module and an Adafruit 2,8" cap touch Display. When trying my code I encountered a strange problem: one specific line of code lets the ...
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2answers
1k views

Adafruit 128x64 OLED not turning on

I ordered a 128x64 pixel OLED display from Adafruit and wired it according to their guide. (To an Arduino Uno) I'm using SPI right now and the display will not turn on or do anything. I haven't tried ...
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1answer
495 views

MAX7219 library that can compensate for poorly designed/miswired 8x32 panel?

I have this sample code: #include <MD_Parola.h> #include <MD_MAX72xx.h> #include <SPI.h> #define MAX_DEVICES 4 #define CLK_PIN 11 #define DATA_PIN 12 #define CS_PIN 10 ...
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3answers
8k 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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287 views

Trying to connect a 1.3" IIC OLED display to an Arduino M0 board (not Uno)

I'm trying to connect an OLED display to the Arduino M0. I got the code example (ssd1306_128x64_i2c) from the Adafruit SSD1306 library I downloaded. Video showing at 8:14 how it should look However, ...