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 TFT screen (ST7735S) to Arduino?

I'm learning to work with Arduino and I decided to work with a TFT display (driver ST7735S, I connect to Arduino Uno), but I encountered a problem in the form that my contacts are labeled differently ...
-1 votes
0 answers
25 views

Is there such thing as an 11.6", no touchscreen, color LCD tft screen, that works with Arduino Uno? [closed]

I am planning on making a game console that looks like a laptop, and I want an 11.6", with no touchscreen, color LCD TFT screen, that works with Arduino Uno (Actually a 30 Days Lost In Space HERO ...
0 votes
1 answer
348 views

Connecting microSD reader and e-paper display to Nano at the same time?

Pretty much as the question states, I'm wondering if it's possible to connect (this: https://www.waveshare.com/7.5inch-HD-e-Paper-HAT.htm ) 7.5" e-paper display that has raspberry pi HAT and an ...
0 votes
1 answer
60 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 ...
2 votes
1 answer
179 views

Adafruit OLED 7-pin display - Abbreviations

I can't remember for the life of me how exactly I set up this screen in previous models, partially because the references I'm using in my code have different names from the pins on the Adafruit ...
1 vote
1 answer
234 views

Multiple Arduinos connected to one display

I have one display screen, and 5 Arduino Nanos. They are checking to see if passwords in a text file hash to a specific hash, then display it on the screen when found. Since they aren't all sending ...
0 votes
1 answer
882 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, one word at a time. It ...
1 vote
1 answer
350 views

LILYGO TTGO T-Display cannot detect MPU 6050 Accelerometer, Gyroscope and Temperature Sensor

I've been trying to connect a MPU 6050 Accelerometer, Gyroscope and Temperature Sensor to a LILYGO TTGO T-Display to get readings displayed on the serial monitor (for starters). The wiring is pretty ...
0 votes
0 answers
78 views

Make encoder work together with OLED display in Arduino Nano Every

I tried to sketch code to make an encoder to generate a number by each step and show it on OLED display. The OLED will connect with I2C, working on in Arduino Nano Every ATmega4809. I separately made ...
2 votes
0 answers
255 views

GPS speedometer with NEO 6M - latency issue

I have built a speedometer, based on this youtube video: https://www.youtube.com/watch?v=gKuJxjxNP-k&t=34s The speedometer is for a car, so it needs to be in real-time and accurate, with the ...
-1 votes
2 answers
569 views

TFT display shows black stripes

I'm new to the field: I'm trying to drive a TFT ST7735S display (this is the model I'm currently using: https://www.amazon.it/dp/B078JBBPXK/ref=pe_24968671_487022601_TE_SCE_dp_1) with an Arduino Mega ...
2 votes
3 answers
560 views

Display images on Arduino LCD screen from PC

I am new to arduino and I am wondering if it is possible to store image data on my computer and send it to my arduino over the USB cable (which is also used for power) to display on a TFT LCD display ...
5 votes
1 answer
2k views

ST7789 TFT display only shows a correct image while Arduino reset button is held down - Why?

I am trying to get the ST7789 TFT display to work with Arduino. I followed online guides for connections and am using the fast library fron github and included workbench ino (https://github.com/...
1 vote
0 answers
247 views

display.begin(); function breaks working code

I've been setting up a system using an Arduino Uno board that reads from both an Adafruit MPU6050 6-way gyroscope and accelerometer and an Adafruit NAU7802 connected to a load sensor. I have code for ...
2 votes
1 answer
41 views

Having issues understanding what "#define GET_STATUS" does

I am trying to use a Waveshare 4.2inch e-paper display with an Adafruit Feather Adalogger M0, but am having issues with two separate instances of #define GET_STATUS being defined differently in ...
1 vote
0 answers
61 views

How to create 2 individual daisy chains using the MAX7219 Module and Mega2560

I am using MAX7219 8 digit 7 segment displays with Arduino Mega2560. Now, I have to physically space out the displays far from each other. Hence, after a certain distance the displays on the far end ...
1 vote
0 answers
64 views

Running a 5V, 4pin pwm fan with Mega2560

I have a Mega2560 and would like to use it to power a single fan and display. The fan is a 5V fan that draws 260mA and I can't find power specs for this display. I can't find a clear answer for how ...
0 votes
1 answer
894 views

How to scroll text on an OLED display using only the SSD1306Wire library?

I'm a 13 years old boy and I am doing a project with esp01 and an OLED screen to display project ideas on the OLED with the ChatGPT API. The answer is displayed on the OLED but I would like it to ...
2 votes
1 answer
1k views

OLED 'SH1106_WHITE' was not declared in this scope

I was following FREE Functions to draw graphs on OLED displays on YouTube but mine OLED display doesn't support Adafruit_SSD1306 library,but it works on Adafruit_SH1106.h driver. The code that is ...
1 vote
1 answer
142 views

WS2812b - Interpolate pixels on neopixel matrix with mask

simplified my goal is to display a transitional Background and some shapes. This shapes are not moving hard rasterized by 1 pixel, more like .1 each cycle. So I need a way to interpolate the movement ...
-1 votes
1 answer
82 views

strange behaviour with a single 7seg display

I'd like to display a sentence character by character on a single seven-segment display. What happens is that if my sentence is longer than 48 characters the central segment doesn't light up. It works ...
1 vote
0 answers
120 views

Converting code for driver IC IL0373 to SSD1680

I'm working on epaper display, and writing code in Segger embedded studio for nRF52840DK. Below is code for Driver IC IL0373 epaper display, has no response on paper display as it have driver IC ...
1 vote
0 answers
110 views

Problems using HC-SR04 with LED displays

I'm having problems using an HC-SR04 ultrasonic sensor in conjunction with an LED display module. The sensor appears to work fine when outputting values to the serial monitor, measuring distances up ...
1 vote
0 answers
46 views

Things stop working if I use Serial.println(tt) and when I use display.drawPixel(i - ii, 64 - Harray[ii], SSD1306_WHITE);

Things stop working if I use line 131 Serial.println(tt); and when I use line 145 display.drawPixel(i - ii, 64 - Harray[ii], SSD1306_WHITE); Also Serial Monitor gives very strange reading. Serial ...
13 votes
4 answers
37k 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 .
-3 votes
1 answer
86 views

displaying double variable problem (Arduino)

so I have a problem with displaying a double variable in OLED & IR remote calculator, like this (using u8g2): displayTextOnRight(String(100000, 0)); //ex. of an void and a number It displays: &...
1 vote
1 answer
538 views

Display issues with 4 Digit, 14 segment

I have this HT16K33 4 Digit 14-segment display I got brand new. I connected it to my Arduino UNO, wired it up and uploaded some quick test code. However, the display looks completely broken (see image ...
0 votes
1 answer
1k views

2 digit number to 2x 1 digit

Suppose I have a number with 2 digits, 42. It is an integer, received from my RTC Now for my 7 segment displays, I will need 2 separate numbers: 4 on display 1. 2 on display 2. How do I slice this ...
1 vote
0 answers
133 views

Strange characters on display st7920

My Display is showing texts with strange characters in Chinese. how can i fix this #include <Arduino.h> #include <U8g2lib.h> #ifdef U8X8_HAVE_HW_SPI ...
3 votes
2 answers
2k views

Nextion Display not getting updated data

I am using an Arduino Mega to display the readings of 4 pots on a Nextion Display as well as store them on an SD Card with a time stamp. I keep getting: recvRetCommandFinished err on the serial ...
-1 votes
3 answers
1k 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 ...
1 vote
1 answer
413 views

anyone heard of MCUDEV_TFT1.44 display? I can't figure out how to connect it to Arduino

I bought this tft display on Aliexpress: https://www.aliexpress.com/item/1005001579367288.html?spm=a2g0s.9042311.0.0.72164c4doyqAub it says "MCUDEV_TFT1.44" below the display. I can't find ...
1 vote
1 answer
662 views

i2c scanner stuck on scanning for my 0.96in OLED screen with my Arduino Nano

My pins are connected as follows; vcc-3v3, gnd-gnd, sda-A4, scl-A5.
1 vote
4 answers
8k 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: ...
0 votes
1 answer
113 views

LiquidCrystal issue with HD44780 display

Here my sample code for an Arduino Leonardo-based custom board: #include <LiquidCrystal.h> const int rs = 3, en = 0, d4 = 4, d5 = 30, d6 = 12, d7 = 6; LiquidCrystal lcd(rs, en, d4, d5, d6, d7); ...
3 votes
4 answers
3k views

Reading a 10 pin 7 segment (2 digits) sing Arduino 1. Please Help!

thanks for taking the time to read this, I really appreciate it. I am very new to Arduino and the Micro controller world so please forgive my ignorance. So I have an old 7 segment display that ...
2 votes
1 answer
85 views

Can this display's address be changed?

I need two displays hooked up to an Arduino MKR Wifi 1010, and I saw this video which shows how to do it: this video. I also would like to have a full color oled display about 1 inch big so I would ...
-1 votes
2 answers
58 views

reading strings from multiple Arduinos

So I have 5 Nanos all trying to crack a password, the idea is each one has one fifth of the list so they can test 5 at a time, then when it is found, I want it to be displayed on a screen I have, the ...
2 votes
1 answer
129 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.: ...
2 votes
4 answers
906 views

My program is using too much memory

I work in a warehouse and I was tasked to make a device which will show the location of any product when Product ID is given. All of our product has 3 things. Product ID, Rack Number and Gap number. ...
0 votes
1 answer
1k views

Convert String to const unsigned char

String abc ="0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff"; const unsigned char displaydata={reinterpret_cast<const unsigned char*>(abc.c_str())}; display.drawBitmap(...
-1 votes
1 answer
205 views

How to light up middle points in a display with 4 digits? [closed]

How to light up the two points that is in the middle? It only lights up when the digB is set to LOW, and it lights up all 3 points that is in the middle. Example code: const int displayPins[] = {2,3,...
1 vote
0 answers
75 views

Adafruit TFT 1.3 inch display with arduino-rotate the font

I am using Arduino MKR1500 with adafruit 1.3 inch display(https://www.adafruit.com/product/4313) and I want to rotate the font on the screen by 90 degree. I tried setRotation() and added an angle in ...
1 vote
2 answers
465 views

How to write to the second line of a display?

I got this 4 line display from Mouser: https://www.gravitech.us/20chbllcd.html, and I get it to work fine for lines 1 and 3 (as line 3 is just the 21st character of line 1). But I am struggling to get ...
0 votes
1 answer
205 views

ESP32 WROOM32 SPI EMF issues

I'm trying to run Waveshare SSD1327 128x128 screen via SPI on ESP32 WROOM32 board. On ESP8266 (D1R1?) it works flawlessly while using HW SPI but when I run it on esp32, anything connected to mains ...
1 vote
1 answer
278 views

how to display text to 8x8 matrix with 64-bit long integers?

I have an array of 64-bit integers to display on an 8x8 led matrix const int LEN1 = sizeof(Hours); const uint64_t Hours[] = { 0x00043c3c3c3c3c00, 0x000c3c3c3c3c3c00, 0x001c3c3c3c3c3c00, ...
0 votes
1 answer
126 views

Artefacts on display when adding seemingly unrelated code

I have this simple program, where I am implementing a menu structure on an OLED display and a rotary encoder. The code works functionally as intended, however when I add more menu items, then I get ...
1 vote
0 answers
56 views

Program an lcd display with 12 pins

I have a screen just like this (is the datasheet). My question is, Can I use it to an Arduino board?
1 vote
1 answer
146 views

Arduino lcd displays random chracters

I have connected arduino nano every to my lcd display. It works perfect when i put all my code in setup() part. But when i put the code in loop() it does werid things. I have to put my code in loop(), ...
0 votes
1 answer
458 views

ESP32 FREERTOS crash using Adafruit ST7789 in tasks with the Wifi enabled

I am trying to create a clock using a ST7789 display and a DS3231 RTC. In this clock I want to use NTP to keep it synced and maybe use the WiFi to anything else. My problem started when I have tried ...

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