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.
231
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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 ...
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0
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19
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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 ...
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0
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30
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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 ...
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1
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97
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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 ...
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1
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68
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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 ...
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0
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38
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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 ...
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0
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31
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Problem with switching screens using U8glib
I'm making little project on my arduino nano using OLED display. I want to make 'boot screen'. If I will turn on device then Image1 should appear, wait few sec then Image2 should apear and then the ...
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1
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94
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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 ...
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1
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59
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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: &...
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0
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76
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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
...
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1
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71
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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);
...
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2
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1
answer
60
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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 ...
Samm
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0
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151
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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 ...
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2
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49
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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 ...
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1
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124
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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 ...
2
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4
answers
670
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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.
...
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1
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860
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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(...
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1
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101
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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,...
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1
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0
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52
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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 ...
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1
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138
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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 ...
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1
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178
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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
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1
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91
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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 ...
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0
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51
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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?
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1
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83
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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(), ...
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1
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292
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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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1
answer
225
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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 ...
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1
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447
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4 Digit 7 segment display flickering
I am attempting to make an Arduino counter using a 4 digit 7 segment display. The problem I am encountering is the display flickers. I am using an Arduino Uno and 5641AS digit display (so common ...
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2
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50
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Detect if a display is connected
I want to detect wether a display is connected or not.
This is the display: https://www.az-delivery.de/en/products/1-77-zoll-spi-tft-display
I read connecting a pin of the display with another pin ...
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1
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130
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Efficient workflow/tools for converting color images to hex arrays
I would like to display 65k color animated gifs on my oled. I'm using the adafruit library for https://learn.adafruit.com/096-mini-color-oled
Now I need to convert a significant number of images to ...
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2
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0
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770
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Sending a JPEG from one Arduino to another
I've got an Arducam OV2640 which takes a picture as a JPEG that I'd like to send to another Arduino using a pair of nRF24L01 wireless transceivers to eventually display it on an SSD1351 OLED.
...
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416
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Getting Trouble in multiple ST7789 SPI LCDs (without CS) with ESP32
I am developing a product in which i have to use 5 LCDs. The LCD i am using does not contain CS pin. SO i had to use MUX for muxing of complete SPI bus from one LCD to other.
But the issue i am facing ...
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2
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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 ...
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0
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686
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Nextion won't update text using data passed in Arduino Uno serial print
Q: Is it possible to send data in variables from Arduino to Nextion through SerialPrint? If so, what is the correct syntax?
I have an Arduino Uno connected to a Nextion NX4024T032 and a Sunfounder ...
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1
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60
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Use Android on Arduino TFT
I don't know whether this is possible or not but is there any way that I can run something similar to Android on a normal TFT. I want to make complex graphics but can't program those complex programs ...
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1
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Alternatives to Nextion display
I am wanting to have a display where I can design the GUI on a program and then somehow transfer it to the display. For the graphics I want to make, it would be really hard to manually write the code. ...
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1
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1k
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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/...
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177
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Help in personal alarm clock project, cant write time on seven segment display
I'm trying to make a type of Arduino alarm clock, which when the time I inputed is equals to the current time, a servo will turn on my lights. It basically consists of a Keypad, an RTC DS1307 and a ...
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1
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924
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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 ...
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Arduino Nano and 0.96 i2c oled screen not working
When I try to scan the i2c address it stays stuck on "i2c Address Scanner" which is the first line of the code.
My screen is connected with VCC-5V, GND-GND, SCL- 4.7K resistor->A5, SDA- 4....
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I want a bar type display for my Arduino Project
I am trying to make a smart table project. But I have stumbled upon one problem, that is I don't know which display should I use. I need a display that has roughly aspect ratio of 2:1 but also has a ...
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1
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174
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MD_Parola display issue when constructing test
I'm using ESP8266 and 4 dot Matrix Tiles, to display clock ( updates using NTP and WiFi ).
Everything is working well, but only when I'm constructing text using a const char* type.
But, since I wish ...
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How to use LCD display HD44780 with arduino without using any library
My professor wants me to implement a display to an old project prototype we had laying around on the lab.
But he wants me NOT to use LiquidCrystal.h library or any other to achieve that.
I read ...
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1
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750
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Measuring car speed between two points: What sensor to use and how to cover the distance?
PROBLEM
Cars regularly exceed the speed limit in our street
SOLUTION
Measure each car's speed and clearly display the speed to the driver
EXECUTION
Measure the time the car takes to cover a set ...
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1
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Can it time between blips, store the time between blips, subtract one time from the other and divide one time by another and display it?
I am counting rotations of a shaft and timing events that occur during that rotation. I wish to display
the event timing as a percentage of ~1/4 of the rotation timing. This would involve recording ...
0
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2
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1k
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How can I get my LCD display to display Chinese and Japanese characters?
I'm making a project that requires me to display Chinese and Japanese characters on an LCD. However, the 16x2 LCD display I have does not seem to support displaying Chinese and Japanese characters.
If ...
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194
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What does display.setSegments(&segto, 1, 1); do?
I am using a TM1637 display for my Arduino Uno. The goal was to just light up one point of the colon in the middle - what seems to be kind of impossible to accomplish. During research I stumbled over ...
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399
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esp32 e-paper driver not working
I am trying to setup waveshare 7.5 display (Waveshare_7_5) with esp32 e-paper driver using ESP32-e-Paper-Weather-Display
My code is here https://pastebin.com/raw/2zQDe9a9, have corresponding ...
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280
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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 ...
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2
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204
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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 ...
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3
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525
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240*320 transparent OLED display with Arduino
A long time ago I ordered this transparent OLED display (from a chinese supplier on alibaba) planning on interfacing it with an Arduino but didn't really have the skills to get the project going.
I ...
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