Serial LCD - I2C Backpack
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- เผยแพร่เมื่อ 6 พ.ค. 2016
- This LCD backpack is built on port expander IC PCF8574T which converts the parallel interface of LCD to I2C interface.Only 2 wires SDA & SCL needed apart from Vcc,Gnd for communication with uC.
Can be soldered on to 16 x 2 , 16 x 4 & 20 x 4 LCDs.
Download Arduino Library & example code here :
www.alselectro.com/files/Libra... - แนวปฏิบัติและการใช้ชีวิต
Just got to connecting a 1602 last night and never would have gotten it going without this covert well made video on pause between steps. Thank you sir
Really Helpful! I tried almost every blog on the internet regarding this but only this one paid off!
Thank you my friend...your video was the best tutorial I had seen. I was surprised when instead 0x27 address I found that my factory address was 0x3F...I put it in it place and my LCD alived...thanks again...you are doing great job...
Thank you. Your link is particularly straight forward working.
nice. awesome! I had a sketch for my display. but didn't get it to work. So I ran the I2Cscanner you provided. I found out that the 0x3F was wrong in my code. thanks!
Thank you for the tutorial. Greetings from Italy!
Thanks so much for the helpful code to find the address.. I'm doing just fine now thanx to your video. Outputting tempature displayed on my new 20x4 Blue LCD, and controller an air conditioner with an n-Channel MOSFET and a SSR. BEAST MODE !!
Extremely Useful! Thank you so much!
Very helpful video, thanks for posting.
Thank you so much great lesson Extremely Useful!
you are always my saver sir.....i didnt know to find address of my module...using scanner code i found solution to my problem...thanku sir
Thanks for the video
Is it necessary to use a logic level converter to 3.3V when I connecting the LCD backpack to a Nodemcu ESP8266
Thanks. Everything was very clear
Works fine, thank you!
Yes, we need an I2C address scanner before use it. Nice job Sir.
sir, I'm trying from last several days, without i2c and with i2c, several codes I tried, successfully uploaded to ide, but the results are same, it lights up brightly, tuning pot make no difference, pls help.
Nice video sir..Good explanation..
Very helpful; thank you sir!
Great presentation.
hello, sir, i want to make conductivity meter by using Arduino nano and 16x2 LCD. please help.
Greate video.
But you should avoid placing the libraries under "Program files", they disapears when you upgrade Arduino.
A better place is "Documents\Arduino\libraries", and to import it you can use the menu "Sketch | Include Library | Add .ZIP Library..." to install libraries in ZIP files.
Yes that is always a good practice to import & install library.Thank you for the tip.
how to connect ds18b20 and 16*2 lcd with i2c backpack on raspberry pi 3
Is it possible to attach the backpack to the LCD without soldering?
sir im using 20×4 LCD of JHD204A. when machine is on during the mode selecting process some chinese letters and unknown letters are arrived but i get output what is the prob .how to rectify? pls give me a solution Imediately
Great explanation. But the link is broken. Can you please re upload?
i need pcf8574 need to connect to 128*64 GLCD ,how it can be done ?
saravanan can u help me i have a serial display like the one u are showing from the video i dont know how to show the humidity and temperature from the display i mean i dont know the code but i can write the code for the humidity temperature sensor DHT11 and i can show it from serial monitor in arduino IDE from my laptop only thing i dont know is showing it from I2C display and the code for the display i even download DHT11 zipfile can u help me on this plz your video is very helpful thankyou very much sir
Works on Mega using SDA & SCL. but I dont get it to work on UNO using A4 & A5.
Hi! I'm trying to use with Galileo but it's failling :'(
someone can help me with that?
How to I use the dis play without LCD module
Great tutorial, clear and simple!!!
Hi just asking can you make video of ADXL 345, Sensor it uses processing software and we can make pattern in processing software but i dont know how to make diiferent patterns this sensor is Accelerometer, thanks Ami
What is the problem i cant see what on the displace well. can see one help me ?
Hi very good explanation thank you
This is excellent!
I have a 20 x 4 lcd and I changed the code lcd.begin(20,4); but all I get on the screen is just a black square that appears in random positions.
It worked for me with this code.
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); // Set the LCD I2C address
TO ANYONE WHO HAD A PROBLEM OF BLUE BOXES or the error "LiquidCrystal_I2C lcd(............." ,SOLUTION: in the fist you can wirte this: LiquidCrystal_I2C lcd(0x27,16,4);
BUT at the void setup you must add this line on the top: Wire.begin();
I figured it out ;)
well explained
helloworld:5: error: no matching function for call to 'LiquidCrystal_I2C::LiquidCrystal_I2C(int, int, int, int, int, int, int, int)'
I have only been able to scan the IC, but i cannot compile, the error message is shown above.
i got rid of the problem by liquidCrystal_I2C(0x3f,x,x) but i still cant get it to display a message..
me too ,any solution ?
Same problem here...
same problem
delete the old liquidcrystal library before placing the new lcd library
thanks but can you make omething else from it
nice video!!!
Sir I have RG2004A 20*4 Display can it compatible with?
please help. i have to convert serial to i2c . (gps module)
please tell me how
nice vedio thanks
terimakasih banyak. sukses selalu :D
Awesome
Thank you sir
u saved my life
Sir it is very helpfull video for me as a student. But from many days i am searching a diagram or project for proffessional Led Stroboscope which is used for printing industries. Can you help me for that.
thank you
sir I am trying from several days, different libraries, different codes, without i2c,with i2c but the results are same, it successfully uploaded to arduino ide, only the back light lights up no boxes, no text to be seen, pls help.
same
TO ANYONE WHO HAD A PROBLEM OF BLUE BOXES or the error "LiquidCrystal_I2C lcd(............." ,SOLUTION: in the fist you can wirte this: LiquidCrystal_I2C lcd(0x27,16,4);
BUT at the void setup you must add this line on the top: Wire.begin();
I figured it out ;)
Caution: I had a header soldered to my LCD 1602. It is very tedious removing these headers but, I , carefully got it done.
how to program with pi16f877a in mplap sir.
pls guide me sir
DİD YOU FİND ?
Fehler 16x2 geht nicht bei mir alles logisch angeschlossen,mamamia wer soll das alles Wissen,werde Testen
Thanks sir
I followed the steps. - the address was 0x3F with all the resistors REMOVED.
I had to modify the scetch to this one: and only after it was modified as I will show bellow- it worked. I had tried 2 LCDs
#include
#include
// Address,EN,RW , RS, D4,D5,D6,D7,BackLight,BL_Polarity
//LiquidCrystal_I2C lcd1(0x26, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
LiquidCrystal_I2C lcd2(0x3F, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
void setup()
{
//lcd1.begin(20,4);
// lcd1.backlight();
// lcd1.print("LCD 20 X 4 ");
// lcd1.setCursor(0,1);
// lcd1.print("I2C Address 0x26");
// lcd1.setCursor(0,2);
// lcd1.print("Line 3");
// lcd1.setCursor(0,3);
// lcd1.print("Line 4");
lcd2.begin(16,2);
lcd2.backlight();
lcd2.print("LCD 16 x 2");
lcd2.setCursor(0,1);
lcd2.print("I2C Address 0x3F");
delay (2000);
}
void loop ()
{
lcd2.scrollDisplayLeft();
delay (1000);
lcd2.scrollDisplayLeft();
delay (1000);
lcd2.scrollDisplayLeft();
delay (1000);
//---
//lcd.noDisplay();
//delay (200);
//lcd.disaply();
//-------
lcd2.clear();
}
Didn't work for me :(
hai sir ,thisis ravi kanth from ananthapur.....i watched your video....it is too good .....sir i followed your video carefully..........i ordered a backpak pcf8574t... but in delivery the board is pcf8574AT.....in the video you used first one pcf8574t...........i connected accordind to the procedure......but the display is blank with back light......sir please tell me What is the difference between pcf8574AT & 4T....and how to program pcf8574AT.....THANK U SIR.
I am trying to add a flowmeter to an lcd. All I am getting is a bunch of weird characters in my display any ideas how to get real values from the below code?
#include
#include
#include #define I2C_ADDR 0x27 //
Just can't handle the music anymore too repetitive endlessly looping going to drive me crazy don't care how good the instructions are I can't handle the music being so repetitive
TO ANYONE WHO HAD A PROBLEM OF BLUE BOXES or the error "LiquidCrystal_I2C lcd(............." ,SOLUTION: in the fist you can wirte this: LiquidCrystal_I2C lcd(0x27,16,4);
BUT at the void setup you must add this line on the top: Wire.begin();
I figured it out ;)
in3l tbon mk
I appreciate you sharing this tutorial, but for heaven's sake that background music is awful. Please be mindful that your viewers will be watching for over thirteen minutes and have to listen to that music...
Dead frickin' links boo hoo