lcd displays random characters brands

My LCD is showing random characters, see the picture below (the last character blinks, some characters change and over time there are slowly more and more characters). I"m starting to wonder if the LCD I chose has a driver compatible with the LiquidCrystal library, what do you think? If so what can I do to avoid buying another one?

When I start my code, it displays as expected the initial screen on the LCD (as defined in setup() function) and then the temperature. But suddenly the LCD displays random characters, see attached, and somehow never stop displaying random characters until i restart the board.

So I am ultimately trying to build a fun security system using a 4x4 number pad, arduino, and a solenoid. While trying to get the number pad and LCD to work together, I keep running into issues for reasons unknown to me. The code below is what I have so far:

I"m working on a project whose objective is to control two ac loads (one ac fan, controlled by phase angle control and one ac motor controlled by a 5V relay) and output to an LCD the room temperature and the % of fan speed.

First, I put the lcd.clear() function in my code to "rebuild" the info from time to time but it doesen"t work 100% and it"s not a "clean" solution for the pourpose.

After a few hours, even using the lcd module I recommended above, the random jibberish appeared again.  By using RUI’s example from his “Home Automation Using 8266, Project 6, Unit 4 (which uses an ESP8266 instead of ESP32, I no longer get jibberish.

I have been struggling for days with the same issue. what did help me getting rid of the “random gibberish” is to put 10k pullup resistors to VCC on both the data and clock lines

Also create a sketch that uses the 10K pullups using the same libraries, LCD and sensor with MQTT, in other words  just reading the temperature and displaying it to the LCD and then it works.

In place of lcd.clear(), use lcd.setCursor(0, row) where row is the row you want to clear, than fill it with spaces ” ” like this: lcd.print(std::string(” “, lcdColumns).c_str()). After go back to the init of the row with setCursor and write what you want.

For slow down and not have bad characters use this before print in lcd: Wire.setClock(10000), i tried only in setup() but it not worked, maybe because of rtos task in the example. you need to #include for this.

Previous examples connect the white LED backlight to power. The following example is specifically for those using an LCD with a RGB LED backlight. The only difference between the connection is the LED"s backlight on pins 15-18.

What to do when the controller displays random characters?The ATS controller may sometimes display random characters. In most cases, the transfer switch operation is not affected and the indicator lights may still show the correct status.

The main and auxiliary power can then be restored after confirming that the controller has been completely turned off for about 10 seconds. When off, the display backlight is dim and all the indicator lights are off. If the random characters do not go away after a controller reboot, the controller will need to be replaced.

The LCD screen is vital for operating the printer. Should you encounter any kind of trouble, such as a dead screen, corrupted text, or other issues, please refer to the guide below.

First of all, unscrew the LCD screen from the printer frame, remove both M3x10 screw holding it the LCD board in the plastic casing, and remove it from the casing. See if the problem still appears when the LCD is not pressed by the casing.

Firmware updates are necessary to keep your printer up to date. However, the installation of incorrect firmware can lead to letter corruption on the LCD screen. There"s an easy fix, though:

There is a small chance the printer"s LCD screen can glitch out by electrostatic discharge when inserting the SD card. Try to turn the printer off and on again.

This problem usually appears only on user-assembled printers. If your printer"s LCD screen remains blank or displays corrupted symbols after you turn on the printer, there is a chance it is caused by incorrect wiring. Follow these steps to fix the issue.

If you suspect that the LCD ribbon cables connectors are not firmly seated in the slots, disconnect the LCD ribbon cables and check the slots for any bent pins. If there are bent pins, you can use tweezers to fix them. However, be very careful not to break the pin(s) completely.

Will it damage my LCD screen if I display a stream of continuously changing randomly colored pixels, at the monitor"s refresh rate, for a long time? As in, will it damage it any more than displaying a more coherent image?

This issue can occur when the native display resolution of the computer and the resolution of the external monitor are not the same. When the graphic control detects two displays, it usually defaults to the lower resolution for both devices.

To use Windows to control the graphic display, connect both displays, right-click the desktop, select Screen Resolution, and then change the resolution for each display. On some models, you can select an advanced option to either Duplicate the same image on both displays or Extend the desktop image across both displays.

I bought the T6963C 240x128. On the mikroC help file it shows 20 pins, but it has 22 pins. The 21,22 pins are the backlight, but 3 pins show a different name on the help file than they do on the pin diagram for the lcd (i logically wired them though). I used the example code to initialize the lcd and all i can get is random symbols all over the screen.