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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13 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 ...
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1answer
45 views

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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38 views

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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1answer
34 views

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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139 views

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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127 views

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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2answers
210 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 it in an SD Card with the time stamp. I keep getting: recvRetCommandFinished err on the serial ...
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103 views

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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1answer
24 views

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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1answer
207 views

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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First Arduino project questions

So basically I've been wanting to get into working with Arduino boards and such for a while (I actually have a couple of microcontrollers that support micro-python, a subset of my favorite programming ...
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66 views

Estimate soc battery and discharge time using Arduino Uno

I am currently learning to do a project for estimating the soc of LiPo batteries with coulomb counting and calculating discharge time using Arduino Uno to display a warning when the battery runs out. ...
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49 views

How to light up digits at the same time?

I'm measuring inclination with MPU6050, then transmitting data from the accelerometer to second Arduino, where I want to display the number on a 4 digit 7 segment display. I'm using one shift register ...
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1answer
343 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/...
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1answer
90 views

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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1answer
237 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 ...
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0.96 oled i2c display not working with my Arduino Nano [duplicate]

So what I've tried is: Changing the i2c address from 0x3D to 0x3C and it still doesn't work. Ive also tried an i2c scanner and it hasn't worked either. First I connected the screen like this: GND-...
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119 views

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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1answer
45 views

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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1answer
33 views

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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311 views

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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1answer
243 views

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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1answer
38 views

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 ...
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2answers
435 views

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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1answer
68 views

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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190 views

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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1answer
137 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 ...
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2answers
83 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 ...
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3answers
296 views

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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1answer
172 views

FC-16 led matrix module based on MAX7219

EDIT: const char *pc[NUM_ZONES] = { "ROOM", //0 "SUBJECT", //1 "GRADE",//2 }; I did this and I can't get them to display every row simultaneously. void loop(void) { DateTime now = rtc....
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48 views

Waveshare E Ink 4.2 inch library usage

I want to know how to properly use the following functions in E-Ink GitHub library here: https://github.com/waveshare/e-Paper/blob/master/Arduino/epd4in2bc/epd4in2b.cpp void SetPartialWindow(char* ...
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1answer
247 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.
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64 views

Arduino Uno and 7 segment display - wrong value displayed

I am working at this project and I found that if I have set the temperature by rotating the pot to 312 C, the iron started heating up, but when it was at about 60 C then on the display (7 segment, 3 ...
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1answer
96 views

Controllino Mega and Fatek HMI

I have a setup that controls the rotation of two stepper motor using Arduino UNO, HBS860H stepper drivers, 4X4 keypad and LCD screen. I have replaced the Arduino Uno by a Controllino Mega and it works ...
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54 views

How to pause the analog value according to input signal applied to a particular digital pin?

I'm working with a digital blood pressure meter using arduino nano. I need to display the pressure reading during inflation and deflation of the cuff instantly. And when an input signal applied to a ...
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2answers
1k views

Slow refresh rate of 1.8 TFT display

I have 1.8 TFT display for Arduino Nano and it changes color very slow. When I try to change the color of the whole screen I see how it changes color line by line. I use "Adafruit GFX graphics core" ...
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1answer
46 views

Nokia 5110 LCD number display problem

I have a problem regarding a Nokia 5110 LCD display. I am currently building a soldering station based on a PID controller. The original code was using a 7 segment display and I adapted the code to ...
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1answer
359 views

Scroll Left to Right on MAX7219 Display

For scrolling from left to right (Arabic letters) I need a function to print words/sentences on the MAX7219 display. [By setpixel(x, y) function] I did a lot of searching and my efforts failed. I ...
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1answer
45 views

How does the ssd1306 handle different screen sizes?

I noticed that if I have two SSD1306 displays, the 128x32 display will lose every other row if written in x64 mode, and the 128x64 display will show blank horizontal lines if written in x32 mode. How ...
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1answer
106 views

How can I display text on OLED?

I'm trying to print the information, which is received from the other ESP32 by CAN transceiver, on an OLED. The CAN bus is working perfectly, as the 'HELLO WORLD' is already be received. But I can't ...
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211 views

Generate & Display QR using Nodemcu on TFT Display ST7789 240*240

I have NodeMCU & ST7789 TFT display. I want to generate QR Code of any dynamic input and display it on my TFT display. Not able to find any suitable reference. All Standard QR code libraries only ...
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59 views

Topic: How to draw a circle on LCD128x64?

I want to know what's the default or recommended arithmetic to draw a circle on the LCD128x64 using ST7920 driver. I've done the following functions: drawing a pixel at any point on the LCD sending ...
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1answer
379 views

How to control segments with SevSeg library

The SevSeg library by Dean Reading seems to have a keyword to control individual segments on SSD's. I am using four common cathode, single digit displays. Does anyone know how to program individual ...
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984 views

SSD1306 recognized in I2C scaner, can't get it to display

The gist of my issue is in the title. I have a cheap ebay SSD1306 128x64 display which I hooked up to my arduino, and checked the wiring at least 50 times and the address is correct, the display has ...
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1answer
254 views

How to configure 8*8 Dot Matrix LED display with this particular code?

I'm making a cryptocurrency ticker using NodeMCU ESP8266 and have this code so far, I don't know how to configure a dot matrix led 4 segments of 8*8 each with this particular code. The only thing I ...
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1answer
152 views

How to fill a triangle using the LCD5110 Graph library?

Good day! I'm currently trying to create a small 3D engine using C++, an Arduino UNO as well as a Nokia 5110 display with a library. Now I have successfully drawn a cube using triangles, but I want to ...
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36 views

Dim 4k LCD panel in response to ambient light

Warning: I'm completely new to Arduino, and not even sure if it's the right solution here. I'm trying to make a better digital picture frame. Got almost all the way there by just buying a nice flat-...
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1answer
139 views

Adafruit ImageReader Library 2.3.5 added several library dependencies

Why has Adafruit ImageReader Library v2.3.5 recently added six dependencies on other libraries for hardware I'm not using? I used the v2.3.2 of the Adafruit ImageReader Library successfully two ...
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1answer
964 views

How to get text to flash on ssd1306 i2c screen

I am trying to alternate a string back and forth on the SSD1306 oled screen. So I want the display to show "test1" for 0.5 seconds, then "test2" for 0.5 seconds, repeating. the code below is just ...
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Text got scrambled on Tinyscreen+

Yesterday when I was trying to reset my Tinyscreen+ by using a needle to flick its power switch (because the case made it hard to do it with my fingers). It was a bit clumsy and I may had shorted some ...

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