arduino lcd displays garbage manufacturer

The lcd.clear function is slow and can lead to screen flicker especially if done every time through loop(). Overwrite old data with spaces, reset the cursor position and print the new data and only update the screen when the data changes will help prevent flicker.

Hi, i have and LCD 16x2 connected to my Leonardo. I works properly with all the examples son the connection is ok. But I add the LCD to another sketch and it"s just showing garbage, and i have no idea why. I just want to show "Writing:" in the first row, and the variable nombrearchivo in the second row. All of this works using serial, so my only problem is the LCD.

4 - I"m calling lcd.begin(16,4) at the setup, however I was still having an offset when trying to change lines, hence why I had to cobble up those offsets. Maybe I"m missing something here, as I"m pretty sure this shouldn"t be needed.

Troubleshooting Code Problems: Start with a known good code base. Many times, pin port directions or the pin assignments have errors. One good technique is to write test code that toggles only one of the control pins, then verify that the correct pin at the LCD is toggling. Repeat this for each of the other pins. This exercise checks the signal path from the code all the way to the LCD.

If it is a serial LCD with a stream-style interface (CFA-632 or CFA_634) check to make sure that the baud rate set on the module matches the baud rate in your code.

Whether it is bringing up a new design, finding a new display for an existing design, or even getting an LCD to work on a Raspberry Pi or Arduino project, we are here to help.

Hello, guys! I am new to Arduino and I am trying to make digital thermometer. Everything works, but problem appears with Lcd screen. I searched through various topics on forums, but none of them seem to solve my problem.

There are 2 LCD displays connected to identical pins on the Teensy. That is to say that one set of microcontroller outputs connects to 2 displays. Again, they work properly when uploaded through Arduino IDE, but they are both different when uploaded through VS Code. This leads me to believe I have something setup inproperly within VS Code / PlatformIO

In this tutorial we will learn how the HC-SR04 ultrasonic sensor works and how to use it with Arduino. This is the most popular sensor for measuring distance and making obstacle avoiding robots with Arduino.

The sensor has 4 pins. VCC and GND go to 5V and GND pins on the Arduino, and the Trig and Echogo to any digital Arduino pin. Using the Trigpin we send the ultrasound wave from the transmitter, and with the Echopin we listen for the reflected signal.

The Ground and the VCC pins of the module needs to be connected to the Ground and the 5 volts pins on the Arduino Board respectively and the trig and echo pins to any Digital I/O pin on the Arduino Board.

First we have to define the Trig and Echo pins. In this case they are the pins number 9 and 10 on the Arduino Board and they are named trigPin and echoPin. Then we need a Long variable, named “duration” for the travel time that we will get from the sensor and an integer variable for the distance.

The code measuring the distance is pretty much the same as the basic example. Here, instead of printing the results on the serial monitor we print them on the LCD. If you need more details how to use and connect an LCD with Arduino you can check my particular tutorial for it.

There are actually a simpler and better way to program the Arduino to measure distance using the HC-SR04 ultrasonic sensor, and that’s using the NewPing library.

So, we have covered pretty much everything that we need to know about using the HC-SR04 Ultrasonic sensor with Arduino. It’s a great sensor for many DIY electronics projects where we need a non-contact distance measuring, detection of presence or objects, level or position something etc.

I already mentioned the projects that I have made with this sensor at the beginning of the post. Here are some other cool projects using the HC-SR04 sensor and Arduino:

I hope you enjoyed this tutorial and learned something new. Feel free to ask any question in the comments section below and don’t forget to check out my full collection of 30+ Arduino Projects.

This is a new Pi Pico display from Waveshare with many more pixels. It is a 2inch LCD display module, designed for Raspberry Pi Pico, with an embedded ST7789VW driver, 65K RGB colours, 320x240 pixels and an SPI interface. A Pi Pico can be plugged into the rear of the screen for very easy connection without any soldering. It sports 4 simple button switches for user input. It is bright, colourful and easy to program. The makers supply an example program (see below), which includes the display driver, making it very easy to get started. The manufacturer"s wiki can be found at: