How Useful Is The New Uno R4 WiFi LED Matrix As A Text Display? - Sponsored by Solderstick

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The new Arduino Uno R4 WiFi has in addition to an ESP32 co processor, an LED matrix made up of 96 LEDS in a 12x8 grid. Great for graphics and animations. But is it really useful for displaying text using the Arduino Graphics library or is more of an educational tool to learn coding?
Arduino Uno R4 Wifi $28.50 - amzn.to/3SExGDS
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[@learnelectronics]

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/*
###########################################################
# The Hikers Buddy v2 #
# 15 Feb 2024 #
# by learnelectronics #
# th-cam.com/users/learnelectronics #
# email: arduino@[e-mail] #
# Do what you want with the code, please #
# attribute to LadyAda & learnelectronics #
###########################################################
*/
// We need these libraries to talk to the sensor and the LED matrix
#include
#include "ArduinoGraphics.h"
#include "Arduino_LED_Matrix.h"
// we need to tell the cpu what we mean when we call bmp & matrix
Adafruit_BMP085 bmp;
ArduinoLEDMatrix matrix;
// This is where we tell the Arduino how we want it to behave for this program
void setup() {
Serial.begin(9600);
if (!bmp.begin()) {
Serial.println("Could not find a valid BMP085 sensor, check wiring!");
while (1) {}
}
matrix.begin();
matrix.beginDraw();
matrix.stroke(0xFFFFFFFF);
// add some static text

const char text[] = "HBY";
matrix.textFont(Font_4x6);
matrix.beginText(0, 1, 0xFFFFFF);
matrix.println(text);
matrix.endText();
matrix.endDraw();
delay(2000);
}
// This is the repeating logic of the program
void loop() {

float ftemp = ((bmp.readTemperature())* 9/5 + 32); // read the temp from the bmp180 and convert to F
/*
Serial.print("Temp: ");
Serial.print (ftemp);
Serial.println(" F");
Serial.println();
*/

float psipress = (bmp.readPressure()*.0001450377); // read the barimetric pressure and convert to psi
/*
Serial.print("Pressure: ");
Serial.print (psipress);
Serial.println(" PSI");
Serial.println();
*/
float altfeet = (bmp.readAltitude()*3.28084); // read the altitude and convert to feet
/*
Serial.print("Altitude: ");
Serial.print (altfeet);
Serial.println(" Ft.");
Serial.println();
*/
// matrix stuff--------------------------------------------------
// temp section-----------------------------------------
matrix.beginDraw();
matrix.clear();
matrix.stroke(0xFFFFFFFF);
matrix.textScrollSpeed(90);
matrix.textFont(Font_5x7);
matrix.beginText(0, 1, 0xFFFFFF);
matrix.println("Temp: ");
matrix.endText(SCROLL_LEFT);
matrix.endDraw();
matrix.beginDraw();
matrix.clear();
matrix.stroke(0xFFFFFFFF);
matrix.textScrollSpeed(90);
matrix.textFont(Font_5x7);
matrix.beginText(0, 1, 0xFFFFFF);
matrix.println((ftemp));
matrix.endText(SCROLL_LEFT);
matrix.endDraw();
delay(2000);
// pressure section--------------------------------------
matrix.beginDraw();
matrix.clear();
matrix.stroke(0xFFFFFFFF);
matrix.textScrollSpeed(90);
matrix.textFont(Font_5x7);
matrix.beginText(0, 1, 0xFFFFFF);
matrix.println("Pres: ");
matrix.endText(SCROLL_LEFT);
matrix.endDraw();
matrix.beginDraw();
matrix.clear();
matrix.stroke(0xFFFFFFFF);
matrix.textScrollSpeed(90);
matrix.textFont(Font_5x7);
matrix.beginText(0, 1, 0xFFFFFF);
matrix.println((psipress));
matrix.endText(SCROLL_LEFT);
matrix.endDraw();
delay(2000);
// alt section--------------------------------------
matrix.beginDraw();
matrix.clear();
matrix.stroke(0xFFFFFFFF);
matrix.textScrollSpeed(90);
matrix.textFont(Font_5x7);
matrix.beginText(0, 1, 0xFFFFFF);
matrix.println("Alt: ");
matrix.endText(SCROLL_LEFT);
matrix.endDraw();
matrix.beginDraw();
matrix.clear();
matrix.stroke(0xFFFFFFFF);
matrix.textScrollSpeed(90);
matrix.textFont(Font_5x7);
matrix.beginText(0, 1, 0xFFFFFF);
matrix.println((altfeet));
matrix.endText(SCROLL_LEFT);
matrix.endDraw();
delay(2000);
}

[@warrenking1815]

I think the lcd multi line display is still my favorite

[@shagreobe]

My opinion is if the arduino is in a box, the matrix wont be seen anyway

[@cremvustila]

Arduino (the official Arduino) tweeted and linked to this video of yours, Paul! Nice!

[@learnelectronics]

Really? Cool. Thanks for telling me!

[@hoboken5224]

In your sketch, put in a space and/or spaces to stop the glitch in the scrolling text.

[@twbrkfd1733]

I'm using the display and it works quite well with the scrolling text function. The speed can be adjusted. Take that crap plastic off and maybe you will be able to read it better!

[@bblod4896]

Nice. Now, test is hiking up the hill 😊 I wonder if you could use your current barometric pressure to adjust for variances sort of like what aircraft do.
☮️ brother.

[@yurkshirelad]

I can’t read the code on my phone’s small screen, but if you’re delaying after displaying the text, maybe that delay is screwing things up? If you delay, maybe you’re stopping the library from updating whatever it’s rendering, and it’s appearing as static junk?

[@learnelectronics]

Check the pinned comment.

[@colramsha2754]

Does the library need updating?

[@geneirwin645]

Pad the things you are displaying with spaces and you will not have the trailing garbage. "Temp: "

[@tvtoms]

Can't see the code yet, but try initializing the text variable as blank to begin with.

[@learnelectronics]

Check the pinned comment.

[@EdSym1]

Where is the sensor link?

[@learnelectronics]

Bmp180 buy one wherever you like

[@larryplatzek9017]

CODE what CODE WHERE? Good video. HAVE A Good Day. How ia Doggly?

[@learnelectronics]

Check the pinned comment.