Hei! tällaista kysymystä tuli mieleen:
tarviiko tätä jos haluaa arduinolla ohjata lcd-näyttöä?:
http://paeae.com/serial-lcd-backpack.html[/quote}

Ei välttämättä, mutta pinnejä menee paljon vähemmän jos käytät tuollaista serial boardia.

ja sisältääkö nämä lcd-näytöt sen HD44780 -piirin?
http://paeae.com/components/lcd/lcd-128x64gfx.html

Tuossa ei ole HD44780 vaan KS0108B piiri. Graafiset näytöt on suht monimutkaisia käyttää verrattuna tavallisiin HD44780 merkkinäyttöihin mutta on niihin kirjastoja kirjoitettu kuitenkin.

Hello everybody!

I bought this display and thought that it would be easier to control than other displays on the market. Oh boy was i wrong...
I am a novice with arduino but damn this thing makes me wanna cry

My problem is that i can't really do anything with the display since it doesn't respond to my programming..

Get touch screen status for example:

Code:

int incomingByte;
int lcdResetpin = 2;
int ledPin = 13;

void setup() {
 
  pinMode(ledPin, OUTPUT);
  pinMode(lcdResetpin, OUTPUT);
  digitalWrite(lcdResetpin, LOW); //reset lcd screen.
  delay(30);
  digitalWrite(lcdResetpin, HIGH);
  delay(1000);
  Serial1.begin(9600); // initialize serial 1 communication:
  Serial.begin(9600);  // initialize serial communication:
  delay(2000);
 
  Serial1.print(0x55, BYTE); //Autobaud command
  Serial1.print(0x59, BYTE); //Enable touch screen command
  Serial1.print(0x05, BYTE);
  Serial1.print(0x00, BYTE);
  Serial1.print(0x56, BYTE); //version request command
  Serial1.print(0x01, BYTE);
  delay(2000);
 }
 
void loop() {
 
Serial1.print(0x6F, BYTE); //Get touch screen status
Serial1.print(0x04, BYTE);

if (Serial1.available() > 0) {
  incomingByte = Serial1.read();
 Serial.println(incomingByte);
  delay(100);
 if (incomingByte == '2') {
    digitalWrite(ledPin, HIGH);}
 
  else{ digitalWrite(ledPin, LOW);
}}}

That just starts to throw weird characters to the serial monitor and the screen does not give any feedback = byte 2.

I know there are some libraries for different 4D Systems displays but i would like to learn to do something without using libraries that aren't really for this particular display.

- Timo

You can read data from the lcd or something. If not needed, just ground the pin and it works.

What exact model are you using? Are you using the lcd4bit or the liquidcrystal library? Tie pin 5 to ground. See if that helps.

I did some some research and this is what i think i need to get going:

Arduino receives what the other arduino sends, and stores the data in a string of some sort. When a correct character is received ( enter key etc ), it prints what is received to the screen.

I did a test with this:

if (val == 97) {    
  Serial.print('a');
if (val == 98) {    
  Serial.print('b');

It sorta works, but that really doesn't make this useful. This really isn't the "right" way of doing this anyway i guess

( N00b alert.. )

Hi everybody, i have a problem which is probably a piece of cake to solve, but i can't get my head around this..

1. I have 2 arduinos connected to each other using xbee modules ( no problem here )

2. I am sending characters H and L from arduino A to arduino B using code on arduino.cc/en/Guide/ArduinoXbeeShield

3. I am receiving the data with the physical pixel sketch and led on pin 13 lights as set in the sketch.

4. When i try to print the received data to an HD44780 lcd, i get numbers like 79 and 76 ( not the real numbers here ). What is happening here??

I've tried to seek information about dealing with this but with no luck

One more thing. How do i send ( human readable ) messages from arduino to another? Let's say i want to make some sort of a messaging thing.

I really appreciate if someone explains this to me or points to some good info!!

- Timo

I suggest you read this http://www.ladyada.net/make/mshield/use.html

You can switch "push the button" with a transistor

http://todbot.com/blog/bionicarduino/ <- class 3 page 11 about transistors as switches. Great stuff!