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I vaguely know there is a cost with Strings when using Arduino, but I've not investigated that cost yet, so this is coded in ignorance of that sorry. It's on my list of stuff to learn and work ways around it / understand the trade-offs.
there are only trade-ups when using C strings over String class.  Try something like this:
Code: [Select]
void BlinkText(char *msgtxt, int col, int row) {
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis > Blink_interval)   {
    lcd.setCursor(col, row);
    previousMillis = currentMillis;
    if (BlankOnOff) {
    } else {
      //for loop creates a string of spaces same length as word specified
      char spaceBuffer[strlen(msgtxt) +1] = "";
      for (int i = 0; i < strlen(msgtxt); i++) {
        strcat(spaceBuffer, " " );
    BlankOnOff = !BlankOnOff;
Nederlands / Re: url van active browserwind...
Last post by fratsc - Today at 12:17 pm

Tja, dat zou ook kunnen maar ik schrijf de software niet van het epd.
Wat ik wil voorkomen is dat het password (dat versleuteld op de rfid staat) in volle glorie op een andere plaats wordt ingelezen.

En toetsen op veiligheid en toepasbaarheid in het kader van de komende AVG is wel een goede tip.
Dank je wel daarvoor.

Groet Fratsc
please find attached the links to the lib and test sketch

modified Libraby MD_MAX72XX with the new FONT: MD_MAX72xx_font_new.h

Test sketch

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Dear community,
After asking my previous question, I now have another one.
I am attempting to make Serial work on my ATtiny85. I am using the SoftwareSerial library that comes with the Arduino 1.6.4, and the Arduino IDE version 1.6.4. For some reason, Serial refuses to work at all, only working when I jiggle the pins. I can see that when I attach my LED to the serial port of the ATtiny something is happening, but I can't read it with my Uno.

ATtiny85 Code
Code: [Select]

#include <SoftwareSerial.h>

const int RX = 2;
const int TX = 3;
SoftwareSerial mySerial(RX, TX);

const int ledPin = 1;

int state = 0;

void setup()
  pinMode(RX, INPUT);
  pinMode(TX, OUTPUT);
  pinMode(ledPin, OUTPUT);

void loop()
    state = mySerial.readString().toInt();
  digitalWrite(ledPin, state);

Obviously, this is not the code that I wish to use, but it recreates the problem well enough.

Arduino Uno code
Code: [Select]

#include <SoftwareSerial.h>

int RX = 2;
int TX = 3;
SoftwareSerial mySerial(RX, TX);

void setup()
  pinMode(RX, INPUT);
  pinMode(TX, OUTPUT);

void loop()
  if(Serial.available() > 0)

Pin 2 on the Arduino is connected to pin 3 on the ATtiny, and pin 2 on the ATtiny is connected to pin 3 on the Arduino.

I have flashed the bootloader to internal 8 MHz, and I am using the "Arduino as ISP" programmer. The ATtiny is on a common ground with the Arduino, being powered by it, and it has 5V from the Arduino on-board power supply. A tantalum 0.1uF capacitor is attached between the ATtiny's power and ground.

What am I doing wrong?

Thank you!
Software / Re: HC-05 problemi di connessi...
Last post by gpb01 - Today at 12:13 pm
>brunello22: ... ma quanto proponi, lui lo ha già escluso in parteza ...

... sto pensando di alimentarlo con l'arduino e qualora va in sleep mode gli taglio l'alimentazione per riprisinarla al risveglio , mi piace poco questa gestione in quanto ho un lasso di tempo in cui tutto quello che succede viene perso, oltre a questo problema se ho il programma in ascolto sulla seriale, scollegando la batteria e ricollegadola  non ricevo piu' nulla, per ripristinare il tutto devo chiudere il programma di ascolto sulla seriale e ricollegare, questa gestione non è perseguibile in quanto il tutto si deve ricollegare e rifunzionare , consigli su come gestire questa problematica?
Last post by surbyte - Today at 12:13 pm
Français / Re: Programme Arduino Help plz
Last post by icare - Today at 12:12 pm
+1 avec infobarquee

Bonjour, je suis en sti2d et je fais un projet pour le bac, je suis en galere pour vous avouez on a un prof pas terrible et je suis nul sur arduino je cale rien et pourtant je fais des efforts pour comprendre bref.....
Juste une petite remarque :
Ton professeur a suivi un minimum de formation pour le poste qu'il occupe ;)
Tu es en galère : oui tout est une question d'organisation (le projet ne date pas d'hier).
Lorsqu'on arrive au niveau bac, il faut commencer à se prendre en main et devenir indépendant (cela fait partie de la formation).
Pour l'utilisation de la sphère Arduino : la meilleure formation qui existe est celle que tu te donnes toi même (c'est d'ailleurs celle de la plus part des membres de ce forum).

Proyectos / MOVED: Elección panel solar pa...
Last post by surbyte - Today at 12:12 pm
Software / Re: Wemos wifi uno development...
Last post by brunello22 - Today at 12:10 pm
e comunque il pin D1 non corrisponde al pin 1, ma al 5

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