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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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82 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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21 views

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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1answer
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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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1answer
36 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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16 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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1answer
81 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.: ...
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21 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
44 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
36 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
63 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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59 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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112 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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3answers
375 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
27 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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54 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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2answers
94 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
74 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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1answer
63 views

How will I display values from arduino to JTextArea (Java Netbeans)?

I want to display float values in JTextArea but it doesn't show any. It only displays on the systemout. Pls help me out. This is my Java code. import jssc.SerialPort; import jssc.SerialPortException; ...
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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
1k views

Writing a value to 7-segment max7219 displays

I am new to arduino and I am trying to build an interface for my flight simulator. I am using a plugin for the simulator software which returns a float variable to my arduino, which I then want to ...
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1answer
51 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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51 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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49 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
290 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
39 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
1k views

Increase or decrease the brightness of Nextion display

I have a nextion display. I want to implement this issue of it. Start the program. If for example I don't touch the display for 15seconds, it should to turn off its brightness. If I touch the screen ...
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2answers
9k views

10k ohm Potentiometer vs 10k ohm Resistor on LCD Display

I'm trying to use a LCD Display with my Arduino, but I don't have a potentiometer and all of the guides I find always require one, usually a 10k ohm potentiometer. The point is that I'm not very good ...
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1answer
178 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
36 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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101 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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2answers
797 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
194 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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51 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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3answers
2k 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
154 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
84 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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31 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
87 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
450 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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26 views

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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309 views

Reducing the noise of an SSD1306 display by reducing pre-charge in Adafruit SSD1306 library

I have issues with electrical noise on my board (>300mV switching noise on top of 3.3V rail, its quite a lot), which is generated by my I2C SSD1306 OLED display. After some research I found that the ...
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1answer
701 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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2answers
895 views

How to stop OLED flicker when using SSD1306Ascii.h?

Why does the OLED display flicker when using the SSD1306Ascii.h library? The Adafruit library does not have this issue, but I've been told uses a lot of memory and so I'm trying to use Ascii to ...
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1answer
58 views

New OLED seems dead, how can I be sure?

I bought this 2.8" OLED from Aliexpress a few weeks ago: https://www.aliexpress.com/item/32988174566.html?spm=a2g0s.9042311.0.0.72304c4dAWcHG8 And after a ridiculous amount of searching for a ...
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1answer
69 views

7 segment display with common anode

I am brand new to electronics. I am trying to use a seven segment display breakout module with my arduino uno. My problem is that the display has a common positive instead of negative common. How do I ...
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0answers
348 views

Arduino nano with 128x64px OLED freezing

I have an arduino nano, MCP3424 i2C ADC and a 128x64px i2C OLED display. The function is quite basic; the arduino receives information from the ADC and prints it to the screen as described in the code ...
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2answers
159 views

8 digit 7 segment display issues

I've been trying to follow a few tutorials on how to get the 7 segment to display simple output but none seem to work 100%. It starts out fine. It increments the number across the screen and then ...
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1answer
2k views

need help hooking up an oled display

recently i bought this oled display . http://www.wvshare.com/product/0.96inch-OLED-A.htm how can i connect it with arduino . Driver Chip is SSD1306 . Supported Interface are 3-wire SPI, 4-wire SPI, ...
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2answers
2k 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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