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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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25 views

Just saw this question in Arduino CC, and want to know if there is any good ideas? [on hold]

http://forum.arduino.cc/index.php?topic=590532.0 What I still lack for the above display would be something like ON / OFF or SLEEPIN / SLEEPOUT. The used controller ILI9341 should be able to do that....
0
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1answer
29 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....
0
votes
1answer
23 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 ...
0
votes
1answer
93 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 ...
0
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2answers
91 views

7 segment display blinking

i'm not a professional in arduino code, when i want to display the DHT22 temperature and humidity sensor in 3 digit 7 segments , always the display show the sensor value and after 2 or 3 sec the ...
-1
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1answer
34 views

Adjustable temperature [closed]

How can I make a project where I can adjust a temperature with buttons and a display and if the temperature is higher than that I set, a led turn on ?
0
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1answer
51 views

Waveshare 1.54 inch ePaper display requires 5Vs from Arduino Uno

I have an Arduino Uno and I would like to attach a Waveshare 1.54“ display (red, black & white) to it. All the specs tell me that it consumes 3.3 V which I have readily available on the Arduino ...
0
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0answers
87 views

7,5" E-Paper with ESP32 - Avoid flickering

i want to display a static image on my E-Paper display, however, using a stripped-down example sketch from GxEPD, the screen is flashing from time to time - i dont know why and how to stop it, but its ...
1
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1answer
75 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 ...
0
votes
1answer
120 views

Reading text from sd card is returning weird characters?

I have an ebook which is converted to a .txt file saved on an sd card which is connected to the arduino. I'm trying to display the words from the book on a 16x2 lcd display on word at a time. It works ...
0
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3answers
70 views

Need help with a program for a button to change the display on an OLED display

So I am programming an OLED display from my Arduino Uno. I am trying to have a button that switches the different words on the display. (The words are just placeholders for programs as of now.) My ...
1
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1answer
37 views

Can I call functions from a different sketch? [closed]

I am a beginner at programming with Arduino and I am unsure on how can I call functions (such as, getData()) for the touchscreen LCD to display that data. The purpose of my device would be to listen ...
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1answer
53 views

Arduino code to run 2 thing simultaneously [closed]

I am making a project for my college in which I need to measure the rpm of the motor and show the real-time clock on the 128x64 GLCD simultaneously but when I run the project it only shows one thing ...
0
votes
1answer
43 views

1.54 e-ink without driver [closed]

i wan’t to know if is possible to use this raw e-ink display with arduino. if it’s possible to directly connect cables from this ribbon cable to arduino without any driver pcb and control it with 3 ...
1
vote
1answer
129 views

7-Segment, 3-digit display not displaying correctly

I have written the code that should work, but for some reason the numbers do not display correctly. When I choose to display 3 times the same number it works correctly (so pin connections are correct) ...
0
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0answers
55 views

Waveshare Display on ESP32 has weird graphic glitches

I am trying to pass an image to the display through the GxEPD module. I tested the display and its working fine with an example sketch. I am using a WEMOS LOLIN32 and a 7,5" B/W Waveshare display. ...
1
vote
0answers
86 views

Strange things happening with Arduino PROGMEM

I am currently working on a display library. The font should be stored in PROGMEM. The code looks something like this: unsigned int i = 0; Serial.println(pgm_read_byte(&font[1]),HEX); unsigned ...
0
votes
0answers
47 views

Arduino IDE Test-Sketch for 7,5" E-Paper not working

I have a LOLIN32 and want to connect it to a 7,5" Waveshare E-Paper. I select the GxEPD_SPI_TextExample and select the display class and then upload it. I do not get any errors, but the display simply ...
1
vote
2answers
200 views

How can I declare global array with its length stored in EEPROM?

I am working with Arduino UNO connected with BV4612 display. I am working on a simple code that controls several water pumps. Each pump has several modes it can run in. I store these modes in an array....
0
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0answers
494 views

SSD1306 - Is there a way to scroll a certain number of pixels only?

For a hobby project, I am trying to make some sort of little game with an ATtiny85 and an SSD1306 OLED display, mostly to see how much I can do with the least hardware possible. Something like Captain ...
0
votes
1answer
94 views

SH1106 - Transferring long buffer via SPI

I am using an SH1106 and am creating my own driver for it. Nearly everything is doing great with about 2/3ms send time using transfer16. I did notice however that I can use transfer with a buffer and ...
0
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0answers
144 views

SH1106 OLED display on Mega2560 not working?

I am trying to use an SH1106 display with the Mega2560 but simply can't get it too work. I have tried using various different libraries and pins but nothing. (Note I got it working on an Uno just fine)...
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0answers
334 views

SSD1331 7pin oled to 4 pin I2C

This is the SSD1331 display, is it possible to run it on 4 pins with arduino uno?
0
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1answer
212 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 ...
0
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0answers
194 views

Trying to connect to Cayenne IoT server after initalizing SPI display

I am trying to simultaneously view sensor values on Cayenne dashboard and on a TFT LCD touchscreen connected to my Aruino Uno (ATmega328p). I am using a Adafruit_ILI9341 touchscreen running on SPI ...
0
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0answers
111 views

Problems with ST7735

I have this Arduino display that looks very similar to an ST7735 SPI display. I found out that this is the pinout by testing the VCC, Ground and LED pins, but it is not the same one, it is supposed ...
0
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1answer
363 views

Problem to display Ntp time on an oled using U8G2 lib

So I have this code to get ntp time and display it on serial port. But I want to display it on a 1.30 inch I2C oled with a SH1106 controller using the U8G2 library. The only problem is I don't know ...
0
votes
1answer
170 views

SD begin affecting OLED display

Okay, I'm using u8g2 library for my OLED display. After calling SD.begin(4) function, I cannot display anything on my OLED. I'm using U8G2_SH1106_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ ...
0
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1answer
2k views

SSD1306 / U8glib display fonts and commands

I cannot seem to find any reference for the SSD 1306 or U8glib display font library or any command reference, like all the options for display() etc. For my fonts I been going into the utility folder ...
0
votes
2answers
541 views

Wemos: 16x2 display doesn't show anything

I connected a 16x2 LCD display to a Arduino Uno. Then I tested a "Hello, Word" code and it works perfect. Now I want to do the same with a Wemos D1 Mini but it doesn't work. Here the Wemos is not ...
0
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0answers
219 views

ATtiny85 I2C SSD1306 (screen not working)

I have been on this issue for more than 3 days now after I got my SSD1306 I2C in the mail. I have a Tiny Programmer from Sparkfun, which I use with a breadboard. This is my pin layout: pin2-->SDA, ...
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1answer
38 views

Drive graphics on iphone using headphone jack [closed]

I want to have user controlled animated cartoon eyes on a puppet that I have been commissioned to build. Can I use an Arduino to drive graphics via the headphone jack on an iPhone or Android? I am a ...
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2answers
74 views

Less hardware dependent development?

I'm working on a little Arduino game project that uses neopixel strips as a display. Uploading every code change to the Arduino and testing it on the LEDs is slow and drains hardware lifetime. ...
0
votes
0answers
93 views

Adafruit FT6206 controller won't start after unrelated code changes

I am using an Adafruit HUZZAH32 Feather with the ESP WROOM32 module and an Adafruit 2,8" cap touch Display. When trying my code I encountered a strange problem: one specific line of code lets the ...
1
vote
2answers
655 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 ...
0
votes
1answer
388 views

MAX7219 library that can compensate for poorly designed/miswired 8x32 panel?

I have this sample code: #include <MD_Parola.h> #include <MD_MAX72xx.h> #include <SPI.h> #define MAX_DEVICES 4 #define CLK_PIN 11 #define DATA_PIN 12 #define CS_PIN 10 ...
5
votes
3answers
4k views

How to show the º character in a LCD?

I have a 16x2 LCD and I want to show a temperature: 23 ºC. But the º symbol is not properly shown. It shows a strange character instead of the º symbol .
1
vote
1answer
185 views

Trying to connect a 1.3" IIC OLED display to an Arduino M0 board (not Uno)

I'm trying to connect an OLED display to the Arduino M0. I got the code example (ssd1306_128x64_i2c) from the Adafruit SSD1306 library I downloaded. Video showing at 8:14 how it should look However, ...
0
votes
2answers
884 views

Confused between SPI and I2C for SSD1306 OLED

I recently got myself an SSD1306 OLED display: I haven't been able to successfully wire it to an Arduino (Mega 2560) however. I have been reading up on I2C and SPI and checked some libraries from ...
0
votes
1answer
532 views

Using Multiple 4 Digit displays with the same pins

I currently have a ton of 4 Digit 7 Segmented displays(TOFD-5465GGH-B). The display is driven by a PT6961 LED Driver. Using a Library that I found here I was able to use the display with no issues. ...
0
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1answer
44 views

Arduino Pong game Circuit Board Troubleshoot

I am following a tutorial online to make a pong game. I have managed to make quiet a lot work apart from my paddles in the game keep on shaking. The buttons do work fine, up and down on both ends. ...
0
votes
1answer
517 views

MAX7219 7-segment 8-digit display in wrong order

I have daisy-chained three MAX7219 7-segment 8-digit displays and wired it according to this diagram: but no matter what library I use, the middle segment is in the wrong order when I display it. So ...
0
votes
1answer
503 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 ...
1
vote
2answers
434 views

for loop iterated only once

I have written a little project, it works so far as it should but the for loop is only iterated once, then the result is displayed on the LCD. #include <LiquidCrystal.h> #include <stdlib.h&...
0
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1answer
364 views

mcufriend SPI connection

Bought a cheap LCD form china (mcufriend, pictured below) and I cant understand which pin is which to use it with the SPI interface (starting to get worried that I can't use it), I've figured out this ...
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1answer
239 views

Two data outputs to be displayed on one 16x1 lcd display

Before pursuing this very far, I would like to know if I can get two different data outputs (one on the left 8 and the other data on the right 8). And if so, are there any requirements on the display ...
1
vote
1answer
167 views

OLED on Hardware SPI, on DUE

I want to use an OLED with DUE. I plan to connect it via hardware SPI. The Due has a 3X2 pin connector labeled SPI. Is it here where i connect the SCK and MOSI? If indeed, i connect it here, then ...
0
votes
1answer
130 views

Atmega328p screen + midi, possible?

I'm trying to build this Midi2CV (control voltage for analog synths) using a Arduino Nano: https://photos.app.goo.gl/3IhhFL3PrLELLODB3 I was hoping to use this Nokia screen too for settings and ...
1
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1answer
41 views

HD44780 Extended non-display DDRAM?

According to page 10 of this PDF https://www.sparkfun.com/datasheets/LCD/HD44780.pdf The HD44780 has enough DDRAM to operate an 80 character display. A 16x2 display has 32 characters meaning we have ...
3
votes
1answer
626 views

Yet another display 16x2 not working with arduino

I found hundreds of questions about display not working with arduino. However, no matter how trivial this looks like I am having the same problem I cannot understand by reading the other posts. I ...