- Fri Nov 18, 2016 10:41 am
#58316
I used one of those $1 Chinese 1602 parallel to I2C adapters and the code below to test with the ESP8266 ... worked OK.
Code: Select all
/*
Arduino 1.6.7 on Linux Mint 17.3 tested 20160204
ESP8266-Arduino Core: http://arduino.esp8266.com/staging/package_esp8266com_index.json
Sketch uses 233,292 bytes (53%) of program storage space. Maximum is 434,160 bytes.
Global variables use 31,525 bytes (38%) of dynamic memory, leaving 50,395 bytes for local variables. Maximum is 81,920 bytes.
Get the LCD I2C Library here (LiquidCrystal 1.2.1: https://bitbucket.org/fmalpartida/new-liquidcryst...
Download the ZIP, copy the LiquidCrystal folder to ~/Arduino/libraries/LiquidCrystal_I2C
*/
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// Set the pins on the I2C chip used for LCD connections:
// addr, en, rw, rs, d4, d5, d6, d7, bl, blpol
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
void setup()
{
Serial.begin(9600); // Used to type in characters
lcd.begin(16, 2); // initialize the lcd for 16 chars 2 lines and turn on backlight
// ------- Quick 3 blinks of backlight -------------
for (int i = 0; i < 3; i++)
{
lcd.backlight();
delay(250);
lcd.noBacklight();
delay(250);
}
lcd.backlight(); // finish with backlight on
//-------- Write characters on the display ----------------
// NOTE: Cursor Position: CHAR, LINE) start at 0
lcd.setCursor(2, 0); //Start at character 4 on line 0
lcd.print("hello rayburne");
delay(1000);
lcd.setCursor(2, 1);
lcd.print("SofKinetics");
delay(1000);
lcd.setCursor(0, 2);
lcd.print("16x2 Line Display");
lcd.setCursor(0, 2);
delay(2000);
lcd.print("http:hackster.io");
delay(8000);
// Wait and then tell user they can start the Serial Monitor and type in characters to
// Display. (Set Serial Monitor option to "No Line Ending")
lcd.setCursor(0, 0); //Start at character 0 on line 0
lcd.print("Start Serial Monitor");
lcd.setCursor(0, 1);
lcd.print("Type chars 2 display");
}
void loop()
{
if (Serial.available()) {
// wait a bit for the entire message to arrive
delay(100);
// clear the screen
lcd.clear();
// read all the available characters
while (Serial.available() > 0) {
// display each character to the LCD
lcd.write(Serial.read());
}
}
}
/*
Source: http://www.instructables.com/id/I2C-LCD-Controller-the-easy-way/?ALLSTEPS
Exact I2C adapter: http://www.aliexpress.com/item/IIC-I2C-Interface-LCD1602-2004-LCD-Adapter-Plate-for-Arduino-FZ0519-Free-Shipping-Dropshipping/1798929219.html
LiquidCrystal library: https://bitbucket.org/fmalpartida/new-liquidcrystal/downloads
General Notes:
The specific LCD I2C adapter must be specified:
// Set the pins on the I2C chip used for LCD connections:
// addr, en, rw, rs, d4, d5, d6, d7, bl, blpol
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
No other LiquidCrystal_I2C library can be in the user /Arduino/libraries directory.
*/
