rt1602s

[radium98]

Hello people of the edaboard forum .Long time not posting.I faced a problem , if anyone can give me a hand .
i have an lcd wich PN rt1602s lcd mini green 16x2 lines , i do not find the real datasheet of it . i made a little circuit , and flashed two mcu but still read dots . the fw is working,but i need pinout of it , i do not know the manufacturer. the 3 pin Vo is not found for brightness things , wich i guess is two high or low to see the char .
Thanks.

 

[betwixt]

If you can see dots the contrast is OK, I guess it is pre-set on that board with internal resistors. There are many LCDs marked '1602' with different letters but I think they all use HD44780 or compatible controllers so your problem is probably in firmware.

When you say 'the fw is working', how do you know this?

Brian.

 

[radium98]

If you can see dots the contrast is OK, I guess it is pre-set on that board with internal resistors. There are many LCDs marked '1602' with different letters but I think they all use HD44780 or compatible controllers so your problem is probably in firmware.

When you say 'the fw is working', how do you know this?

Brian.

Brian how are you. I guess like you about a preset for the contrast .I say the about the few is okay cause it is flashed twice with different ic and succesfull and the project is working .it is an rds decoder.

 

[KlausST]

Hi,

Basically what you need:
* correct power supply (usually 5V)
* correct contrast
* correct wiring
* correct port setup
* init for 4 bit mode (according HD44780, 2 lines)
* communication in 4 bit mode (according HD44780)
--> check one after the other or give us enough informations to check.

For your case:
There are thousands of wiring examples, there are thousands of code examples, there are thousands of tutorials.
No need to re invent the wheel.

Klaus

 

[danadakk]

Problems with the 1602a LCD display

DEFESTED, Where did you get the display ? Take a photo of the back of it and post it. I may know what the problem is but not until I see the photo.

forum.arduino.cc

In-Depth Tutorial to Interface 16x2 Character LCD Module with Arduino

Learn interfacing 16x2 LCD module with Arduino UNO. This tutorial includes datasheet, working, Pinout, Wiring/Schematic, Code & Custom Character Generation.

lastminuteengineers.com

[SOLVED] LCD 1602A won't display Data

I successfully find the code which works well! Thank you for your guide this whole time 🙂 For those having the same problem this is the code I used for my project (for reference): #include <LiquidCrystal.h> #include "DHT.h" //including the dht22 library #define DHTPIN 9 //Declaring pin 9 of...

forum.arduino.cc

https://www.edaboard.com/threads/lcd-4-bit-mode-is-not-working.405427/page-2#post-1747397

The above might help.


Regards, Dana.

 

[DonaldSabol]

Problems with the 1602a LCD display

DEFESTED, Where did you get the display ? Take a photo of the back of it and post it. I may know what the problem is but not until I see the photo.

forum.arduino.cc

In-Depth Tutorial to Interface 16x2 Character LCD Module with Arduino

Learn interfacing 16x2 LCD module with Arduino UNO. This tutorial includes datasheet, working, Pinout, Wiring/Schematic, Code & Custom Character Generation.

lastminuteengineers.com

[SOLVED] LCD 1602A won't display Data

I successfully find the code which works well! Thank you for your guide this whole time 🙂 For those having the same problem this is the code I used for my project (for reference): #include <LiquidCrystal.h> #include "DHT.h" //including the dht22 library #define DHTPIN 9 //Declaring pin 9 of...

forum.arduino.cc

https://www.edaboard.com/threads/lcd-4-bit-mode-is-not-working.405427/page-2#post-1747397

The above might help.


Regards, Dana.

Thanks Dana for those links, you made my day.