LCD stands for "Liquid Crystal Display" and is commonly known as a screen. The tag should be used for questions related to LCD display.
1
vote
2answers
27 views
How to I press a button once to display text and again to remove it?
My code is displaying voltage and I want to have a button that when pressed it displays a text and when I pressed it again it would turn off the text. I put the word "YES" just for a test
float vPow =...
1
vote
1answer
27 views
Debug soldered connections of LCD 1602A
I am moving my first steps into Arduino and electronics and I have tried to program an LCD 1602A display following this tutorial.
I managed to complete the tutorial up to setting up the contrasts of ...
0
votes
1answer
23 views
Lcd display shield, no characters
So, I've been trying to make an Lcd display shield I got from ebay to work with arduino. Using this very simple code:
#include <LiquidCrystal.h>
#define RSPin 8
#define EnablePin 9
#define DS4 ...
-5
votes
1answer
32 views
No display on LCD
#include <Wire.h>
#include <LiquidCrystal.h>
#define sensor1 x = 9
#define sensor2 y = 8
#define colx 8
int sensor1,sensor2;
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
void setup()
{
...
0
votes
2answers
64 views
Arduino calculator: I'm struggling to write a sketch which parses inputted characters [closed]
I am attempting to make a calculator with arduino using a 16x2 Text-LCD and a 4x4 keypad. I've already programmed the part where the arduino board gets input from the keypad and displays characters on ...
-1
votes
0answers
7 views
Array's data type matter with function lcd.print() for printing 0000-9999
I use my arduino UNO R3 to write a code. But, there is a unexpected condition that LCD screen no-showing is. As the below code, there are 4 places marked on bold and italics letters. I am confused on ...
1
vote
2answers
39 views
How to switch on and off an HD44780 LCD Display?
I have an LCD Display HD44780 model and I was reading his datasheets
I saw the it has the functionality to be switched on/off as stated:
Display on/off control: D = 0; Display off // C = 0; Cursor ...
0
votes
2answers
28 views
use TFT lcd with uno and wifi shield
https://learn.adafruit.com/2-2-tft-display/test-the-display
I need to work with arduino Uno , lcd and wifi shield, and i was wondering if i can use the LCD in the above link with the Uno and wifi ...
2
votes
1answer
37 views
How do I change the I2C address on the LCD backpack?
The 20 x 4 LCD comes with a I2C backpack. I know it has A0, A1, A2 to set the address, as shown at the bottom here: https://tronixlabs.com.au/news/tutorial-serial-i2c-backpack-for-hd44780compatible-...
1
vote
1answer
59 views
How to add toggle button for LCD display text and backlight
I have set up BMP180 and DHT11 to display data on HD44780 20x4 LCD,
I want to be able to toggle the altitude meters to feet and temperature fro degree celsius to Fahrenheit and pressure from ...
0
votes
1answer
54 views
20x4 LCD will write but then won't update
I am controlling a solar tracker, and it needs to be reset every 10 minutes or it loses its mind. My program works fine, controlling power relays, so I have added I2C&Power to be able to see the ...
0
votes
1answer
54 views
Controling pump while displaying moisture value on a LCD at the same time with soil moisture sensor?
I'm new with Arduino (and I'm not very good at English). Recently with Arduino Nano I have tested:
Control water pump based on soil moisture (using relay) (1)
Display soil moiture (in percent) on a ...
1
vote
2answers
38 views
Use interrupts with analog pins in arduino or another possible solution?
I have a very simple circuit, but my program is some what complicated.
Here is the circuit diagram:
Here is the code:
/*
01 - GND -------- GND
02 - +5V -------- 5V
03 - V0 -------- ...
1
vote
1answer
29 views
lcd has no contrast pin
i just bought this lcd. I connected all pins as discripted on this datasheet (Page 8). However i noticed that there is no pin to control the contrast. I also didin't get the display to run yet.
Might ...
0
votes
1answer
30 views
lcd not doing anything
I just bought an LCD. I connected everything as explained in this sheet.
This is the code I am using :
#define RST 3
#define CE 2
#define DC 4
#define DIN 6
#define CLK 5
void LcdWriteCmd(byte cmd)
...
0
votes
1answer
31 views
VLcd pin to ground?
I just bought an ERC12864-655 LCD screen.
On the datasheet it says that I need to connect the vlcd pin to GND.
However in this (page 8) datasheet it says that vlcd is the main power supply. As far ...
-3
votes
1answer
36 views
What is LCD bias voltage and where do I have to connect it?
I noticed that I have VB0+, VB0-, VB1+ and VB1- pins on my LCD. In the datasheet it says they are for the "LCD Bias Voltage". I have never heard about that. So what is it? Where do I have to connect ...
1
vote
1answer
57 views
Arduino Text Scrolling on 16x02 I2c on NodeMcu (ESP8266-12)
I have managed to get my 1602 I2C LCD working on a NodeMCU devkit. I can display text parsed from the web but I am not sure how to set it to autroscroll if message is greater than 16 characters. I ...
-3
votes
1answer
40 views
Where can I get high-quality LCD's for projects [closed]
So I've recently started learning about LCD communication with arduino but I have one question: Devices like PC's and smartphones use very high quality LCD's and if I wanted to use one (not ...
1
vote
1answer
68 views
Arduino Uno with Camera and LCD
I would like to ask you if I can display real time view from Camera in Arduino Uno with LCD.
I have that components:
Camera OV7670 VGA 0.3 MPX
LCD TFT 2.4 SPI ILI9341
Arduino Uno R3
On a website: ...
4
votes
2answers
166 views
ATTiny85 I2C LCD
My setup is as follows:
Arduino IDE 1.6.11
Arduino Pro Mini as ISP
ATTiny85 1602A LCD with I2C board
The libraries I use are:
TinyWireM (source: https://github.com/adafruit/TinyWireM)
...
1
vote
3answers
65 views
FreqMeasure.h uncompatible with my code problem
I have written code to read temperatures on a motor which also has pulse feedback to see speed, (one hall sensor) and my previous version of the code does work fine, however when i add example ...
-5
votes
1answer
32 views
Printing on LCD screen in different languages
I need to write to an arduino LCD screen in different languages like Japanese or Chinese.
Someone knows how?
1
vote
1answer
85 views
LCD 16x2 Blank Display
I am using the following wiring diagram from a tutorial. I need to follow this configuration because later tutorials build on this example. I have looked at other solutions, but they follow a ...
-1
votes
1answer
64 views
DIY Arduino technical difficulties
I followed this ArduinoToBreadboard and I just added a 5V regulator just to be on the safe side.
So my questions are:
When I connect a Nokia LCD 5110 to the DIY arduino, nothing really happens but ...
0
votes
0answers
41 views
How to create and write a file on SD card using arduino
I'm trying to write an arduino program which will write and read data from the SD card using different methods apart from Void setup() and void loop(), but the initialization of SD card I have done in ...
2
votes
2answers
48 views
Arduino Wire.h send double to lcd
I'd like the double number 200.00 shown as 200.00 on my LCD screen.
For instance, when I pass just a number (int) like 40 to the LCD, it uses it as an ASCII code to show a character on the display.
...
0
votes
1answer
40 views
Sending LCD commands to a slave micro
I need to split up code which I've already developed for one micro into two different Arduinos connected by serial. The "remote" micro is directly connected to a 20x4 character LCD and the main micro ...
0
votes
2answers
92 views
Arduino Wire.h library how to communicate with an LCD
I am having an Arduino Uno and an C2042A LCD with I2C shield on it. Because the virtualwire library does not work for me I tried only the wire library but it's still not working:
My Code:
#include &...
1
vote
3answers
87 views
Why do my temperature sensor values become inconsistent when additional hardware is added to the board?
I have this strange problem. My TMP 36 sensor works fine when it is the only thing connected to my Arduino Uno board. The voltage measurements, and thus the temperature, are accurate and consistent. ...
0
votes
1answer
32 views
arduino mega_lcd
.i am doing lcd interfaced with arduino.Sometimes it happens it shows nothing after uploading the program.what to do?
0
votes
1answer
40 views
Arduino which library for led 4x20
I am having an Arduino Uno and I want to add a LCD to it. My LCD is a C2042A with I2C shield on it. I tried the LiquidCrystal_I2C library but it doesnt work. I am not getting any errors the LCD is ...
0
votes
2answers
137 views
Can't display text on LCD 1602
Today I tried to display some text with my Arduino UNO and a LCD 1602A screen. I did find some schemas online, but I cannot get any character or "black boxes" on the display.
I connect wires like ...
1
vote
1answer
99 views
Connecting multiple TFT panels to Arduino Uno via SPI?
Is it possible to connect more than one TFT screen (like this one or similar: https://www.adafruit.com/products/1651) to an Arduino Uno?
I'm wanting to connect and control two color screens at once; ...
0
votes
1answer
42 views
Who makes this cool Arduino display shield, and what model is it?
Anyone recognize Mfgr/model of this display that reads: "Wireless Internet Of Things". The Arduino board is a WIOT.
I've been looking and looking for a source for Arduino display like this, but ...
0
votes
3answers
50 views
Adding Date and Time to existing sketch
I am currently trying to add a clock functionality to my current sketch for a peristaltic pump [run by NEMA 23].
The current sketch waits for a button on my breadboard to be pressed, it then runs ...
0
votes
1answer
35 views
How could I display a iRC Chat on a Arduino i2c LCD
OK so how could I go about putting a iRC chat on a LCD?
I'm kinda new to arduino and LCDs and this seems like a cool project to do :)>
-Thanks
Here is code I'm using to display stuff on the lcd
...
1
vote
2answers
79 views
Arduino LCD Screen
I am newer to arduinos, and could use some help. I have a LCD screen hooked up to an arduino uno. I can get it to display whatever I type in, which is great. But, what i want it to display is a value ...
0
votes
1answer
111 views
Code: Switch case and loop problem
Please am working on this automatic drink dispenser, i got a sample code as am still an amature.
I seem to be stuck and i please need assistance.
Components:
I2C, keypad, LCD peristaltic pump.
...
0
votes
1answer
76 views
Why does my 1602a LCD not display text with this code
#include <SPI.h>
#include <MFRC522.h>
#include <LiquidCrystal.h>
#include <Servo.h>
#define RST_PIN 9 // Configurable, see typical pin layout above
#define ...
3
votes
1answer
61 views
Why does my lcd screen work fine and then display random characters?
It works as expected for a few seconds and then random letters appear on the second row. The wiring and the programming should be correct. I wired it according to an Arduino Starter Kit Book and coded ...
2
votes
1answer
783 views
Why do I get “invalid operands of types 'const char*'” error?
I am making an Arduino alarm. This is the error:
exit status 1
invalid operands of types 'const char*' and 'const char [2]' to binary 'operator+'
Here is the code that triggers it:
lcd.print("0"+...
0
votes
1answer
72 views
Button Relay Control
How can I fix this sketch to make it so that once the button is pressed, it performs some action for a certain amount of time and then returns back to a low state until it is pressed again. For ...
4
votes
1answer
140 views
RFID/NFC Tag get data from wordpress MySQL
I have a local workshop for students to teach them 3D printing/woodworking
I want to know if its possible to create RFID/NFC tags using wordpress data from MySQL or HTTP/HTTPS.
Web Scenario :
I ...
1
vote
1answer
69 views
Trouble using lcd.readButtons() in RGBLCDShield library
I am trying to create a state machine that loops in whatever state it's in until a button is pressed. I am using the Adafruit_RGBLCDShield library along with the LCD shield and 16x2 display. For ...
0
votes
2answers
178 views
Trying to print text on LCD display from Arduino trinket
I'm trying to simply program an Arduino trinket to display some text on an LCD display.
I'm basically trying to follow this, except connect it to a Trinket rather than an Arduino Uno. The background ...
0
votes
0answers
57 views
arduino nokia 5110 lcd problem
I have Arduino UNO and nokia 5110 LCD. And I have DHT 22 sensor,BMP180 sensor. I want to show temperature, pressure and huminity. My sensors are also work. I can see what they calculate in serial ...
0
votes
1answer
42 views
Need Help with Switch Case commands/receiver and lcd screen project?
I am doing a project with a receiver and transmitter and i am trying to get a message to print onto the screen. If anybody has any experience with this could you please help! I am trying to use a ...
0
votes
1answer
125 views
How to sleep a whole circuit?
I have just completed my first project, a clone of the Simon game of the eighties. The main parts of the circuit are an ATMega328, a 1602 2x16 LCD, and a small joystick.
It is powered directly from ...
1
vote
1answer
49 views
Working on a reaction test for the Arduino Uno using an led and an lcd shield
The situation involves some Asm inline practice and a basic circuit. The program turns an LED on after a somewhat random period of time then waits until the button is pressed to report back how many ...
