Questions tagged [display]
A visual output device typically capable of displaying text and/or graphics. Can include various technologies, such as LCD (liquid-crystal display), OLED (organic light-emitting display), and EPD (electronic paper display).
242 questions
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Difference between using GND and digital LOW for 7-segment display pin
I am using this 4-digit 7-segment display.
So my circuit is basically 220 ohm resistors for all the segments (display pins 6 through 16 on the bottom each go through a resistor before going to a ...
- 175
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2
answers
151
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LED Matrix for Arduino R4 Wi-Fi specific functions
I'm searching for the path and the source code for the builtin (I think) function, name is: renderBitmap().
This function appears as a member of the ArduinoLEDMatrix class but its name doesn't appear ...
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1
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192
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Wiring of Wemos/LOLIN D1 mini and 2.13" Tricolor e-Paper?
I'm just about starting with Arduino, ESP8266, etc.
The first project would be to get something diplayed on an e-paper.
My hardware:
LOLIN D1mini V4.0.0
Tri-Color ePaper 2.13 (SSD1680) Shield
...
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0
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1
answer
596
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How Can I Get My ESP32 to Work with a 3.5-inch ILI9486-Based RPi Display Using SPI in Arduino IDE?
I'm working on a project where I need to connect my ESP32 (WROOM) to a 3.5-inch, 480x320 resolution LCD designed for the Raspberry Pi, which uses the ILI9486 driver (as suggested by the lcd wiki). I’m ...
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1
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How do I fix display showing random pixels on ST7789V2 LCD Module?
Problem Description:
I’m trying to interface a Waveshare 1.69-inch LCD module (ST7789V2 driver, 240x280 resolution) with an Arduino UNO board. I’ve connected all the necessary ports as per the ...
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0
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1
answer
324
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SSD1306 i2c OLED display - not able to show images properly
So I am using this 0.96" i2c yellow/blue OLED display: https://www.makerhero.com/produto/display-oled-0-96-i2c-azul-amarelo/ and an Arduino UNO clone. I have generated an image using this site ...
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2
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1k
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TM1637 Decimal points
I am using the following TM1637 board with an Arduino Pro Micro clone.
I am attempting to use the "TM1637Display Library" written by Avishay Orpaz, but I cannot find any way to use the four ...
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0
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1
answer
1k
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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 ...
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2
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0
answers
655
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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 ...
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2
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3
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1k
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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 ...
1
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0
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811
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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
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1
answer
75
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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 ...
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1
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0
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103
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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 ...
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1
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0
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128
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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 ...
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0
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1
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2k
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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 ...
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1
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132
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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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1
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0
answers
230
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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 ...
1
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0
answers
65
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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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3
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1k
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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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1
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197
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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 ...
1
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0
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216
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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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1
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1
answer
1k
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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
answer
140
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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: &...
1
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0
answers
260
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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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0
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1
answer
173
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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
128
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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
1
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1
answer
589
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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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117
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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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2
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1
answer
396
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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 ...
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4
answers
1k
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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
answer
2k
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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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334
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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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0
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105
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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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270
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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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1
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365
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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
answer
189
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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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95
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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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255
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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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549
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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 ...
0
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1
answer
587
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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 ...
1
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1
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731
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Has 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. It says "MCUDEV_TFT1.44" below the display.
I can't find online how to connect it to Arduino. The pins are as follows:
BLK RS RST CS SC DI GND VCC
...
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2
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1
answer
1k
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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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192
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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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442
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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
answers
2k
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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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0
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667
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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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2k
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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 ...
1
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0
answers
1k
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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 ...
0
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1
answer
143
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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 ...
3
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1
answer
3k
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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. ...