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 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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17 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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45 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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56 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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56 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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70 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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40 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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23 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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48 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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93 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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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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31 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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44 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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55 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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97 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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82 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
34 views

What image formats are accepted for displays?

Sorry if there is information missing, im new to the topic. I have an ESP32 connected to a Waveshare 7,5" RWB display, and i can display images by converting them to .xbm and including the hex code ...
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546 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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139 views

How to make a custom character on a TFT LCD display? (128x128)

I'm currently using the ucglib library. I'm new to arduino and I'm wanting to simply display a lcd smiley I made with the byte generator. I still have some of the original 'font hello world' stuff ...
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118 views

TFT ST7735 Library - Can't Display Bitmap

Using a cheap Chinese ST7735 type 128x160 display with the TFT_ST7735 library (https://github.com/Bodmer/TFT_ST7735). I'm using an Arduino Mega 2560, hardware SPI. Example works perfectly, ...
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448 views

How to display float variables on oled display (0.96'')

I have a similar problem than the discussed here : How to display variables on 0.96" OLED with u8glib library? I'd like to know how can I show float variables in place of int variables. What ...
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50 views

OLED not updating display

I'm trying to connect a GPS unit (GY-GPS6MV2) and an OLED screen as in the diagram below (green connector is GPS; VCC, RX, TX, GND left to right): Here's the code I've come up with: #include <...
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322 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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28 views

How to detect V-SYNC on the SparkFun MicroView?

Is there a way to detect the start of the OLED screen refresh cycle (V-SYNC) on the SparkFun MicroView? There is no code for this functionality in the Arduino library; in fact it looks like the ...
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97 views

Using a 122x32 LCD display with u8g2

I recovered a 122x32 graphic LCD display, its reference is NMTB-S000087FYHSAY-04. Here are some pics It was retrieved from a completely rusted object, but the screen seems to work. It is a 122x32 ...
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47 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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92 views

DA8620 8-Bit Parallel OLED with Arduino

I have had a 2.4” transparent OLED on my desk for a while now and think now I have a years more experience, I can attempt hooking this up to an Arduino again. My interest was sparked when I realised ...
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26 views

TM1637Display is not updating on loop

Alright so I've been trying to update/change the number on the display during a loop, but nothing really happens. It doesnt change/update, the value is always exactly same. #include <TM1637Display....
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107 views

Which Arduino microcontrollers are able to drive a parallel 8-bit ILI9341 display at 320x240@60fps with DMA or extra CPU core or both and how?

I've always wanted to make my own game console. I don't know why the existing Arduino game consoles have this issue with framerate when a 2006's Sony handheld PC had 1GB of RAM and an Intel CPU ...
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31 views

TouchScreen GUI Reference Guide Help

Recently I have gotten some Touchscreens to add to my projects and I am very excited to use them. However, I am not sure where I can find a guide to help me create my own GUI with the touchscreens. ...
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51 views

Arduino 3.5" TFT Display going blank after sending data through I2C

I'm trying to use I2C to send and receive commands between an Arduino UNO R3 and an Arduino Mega R3, with a 3.5" TFT display connected to the Mega. I have verified that my display is fully functional ...
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1answer
148 views

HD44780 DDRAM addressing on the second line

I write bytes to HD44780 display DDRAM to display characters and it works weird on the second line. I use 16x2 model and I write "0123456789" string from address X on. According to the datasheet: ...
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53 views

Can't swipe between RTC and some event

Some ideas please? I'm stuck and also don't judge me for how i wrote the code. I'm new into coding and still learn. So, the idea is that i want to display data and clock on lcd but when the lamp is on ...
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147 views

Mirror text on 8 way 7219 [closed]

While this was seemingly answered in another forum question, the answer given of using an alternative library of... #define HARDWARE_TYPE MD_MAX72XX::FC16_HW was tested and resulted in a worse ...
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2answers
63 views

7 LED Number Display

I need to write a string of number such as 1234567 on a 7 LED display. For example 1 will be lit up on display for 0.5 seconds, it will turn off then 2 will light up and so on. In the end I need to ...
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123 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 ...
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202 views

16 X 2 LCD display blank with Arduino Uno

So I am following this tutorial to make my arduino display hello world and millis(), I got it to work for a minute, but then it stopped updating the milliseconds, and when I pushed the reset button it ...
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202 views

Arduino OLED Display strange output

I am trying to use the Adafruit SSD1306 lib with my OLED display for arduino but I've encountered an strange error. I am using the default example "ssd1306_128x64_spi" but the display is odd, the ...
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238 views

What am I missing? ST7735 TFT white screen

I followed this guy's guide with regards to wiring, etc., and all I seem to be getting is a white screen, as shown in these pictures. Is there an issue with the guy's guide, I'm missing or there is an ...
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396 views

How can I put this display SSD1306 to sleep?

I have built a kitchen timer and it is supposed to spend most of its life in sleep mode in order to save power. I am using the SSD1306Ascii library (SPI) by William Greiman. In this library I have ...
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40 views

Displaying characters as bitmaps

I have resorted to creating bitmaps for each number and a few letters for a 128x64 Oled module. This was to save memory and get around limitations of libraries such as the u8glib. If I had linux I ...
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1answer
894 views

I need help with U8GLIB library

I have a project which uses a 128x64 oled display. I have to use the U8GLIB as the available displays change from SSD1306 to SSH1106 depending on when you buy it which that library covers both ...
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1k 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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238 views

White squares LCD display

for a school project I need to program a display. I've got in almost working. I made a setup screen in the setup() that just says our groupname and the name of our project for 8 seconds (this works ...
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85 views

Arduino nano -> 74HC595 -> LCD display

Greeting to all, Newbie in the contraption above (Arduino nano -> 74HC595 -> LCD display); I would like some help from the experts. I connect the 74HC595 to the LCD display using the 4 wires as ...
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159 views

Serial.print prints but lcd.print does not

The following code reads a txt file from a SD card, finds the corresponding character and prints the next 12 characters: ... char temp; byte who = random(1, 13); // 1 to 12 temp = ...
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2k views

SSD1306 allocation failed when adding a constant

I am trying to get this code working: #include <Button.h> #include <SPI.h> #include <Wire.h> #include <Adafruit_GFX.h> #include <Adafruit_SSD1306.h> #include <RTClib....
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1answer
34 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 ...
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222 views

Frequent ON OFF in SSR

I am working on a project on Arduino OLED MAX6675 thermocouple and SSR for my oven. My problem is when my SSR goes in LOW or HIGH state it turn ON and OFF several times before going to permanent HIGH ...