{"id":103929,"date":"2021-05-05T10:29:02","date_gmt":"2021-05-05T10:29:02","guid":{"rendered":"https:\/\/www.snapwhole.com\/index.php\/ham-radio-digital-mode-frequencies-2\/"},"modified":"2023-01-17T01:05:10","modified_gmt":"2023-01-17T01:05:10","slug":"arduino-programming-the-lcd-1602-with-i2c-interface","status":"publish","type":"page","link":"https:\/\/www.snapwhole.com\/index.php\/arduino-programming-the-lcd-1602-with-i2c-interface\/","title":{"rendered":"Arduino – Programming the LCD 1602 with I2C Interface"},"content":{"rendered":"\n

Arduino – Programming the LCD 1602 with I2C Interface<\/strong><\/mark><\/p>\n\n\n\n

Return To Arduino Projects<\/a><\/d3><\/center>

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1602 LCD with I2C Interface<\/figcaption><\/figure>\n<\/div>\n\n\n\n
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Identify your I2C Port Addresses<\/h2>\n\n\n\n

Before attempting to program and I2C device with the Nano or UNO, use this I2C device scanner to find or confirm you I2C device HEX address<\/p>\n\n\n\n

LCD 1602 I2C and the UNO\/nano – Wiring Connections<\/strong><\/p>\n\n\n\n

LCD 1602 I2C Pin UNO Header\nGND             - GND\nVCC             - 5V\nSDA             - A4\nSCL             - A5<\/pre>\n\n\n\n
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1602 LCD with I2C Interface – Rear<\/figcaption><\/figure><\/div><\/div>\n\n\n\n
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1602 LCD with I2C Interface – Front<\/figcaption><\/figure><\/div><\/div>\n<\/div>\n\n\n\n
LCD 1602 I2C Address<\/strong><\/p>\n\n\n\n
To select the 1602 LCD for your project use:<\/p>\n\n\n\n
LiquidCrystal_I2C lcd(0x27,16,2);<\/p>\n\n\n\n
This is the hardware address (0x27) and the size of the LCD, Positions (16) and Lines (2)<\/p>\n\n\n\n
If you need to verify the hardware address of the 1602 LCD follow this link:<\/p>\n\n\n\nScan and Identify your Arduino I2C Port Addresses<\/a><\/d3>

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That utility will list all I2C devices, and their hardware addresses<\/p>\n\n\n\n
Sketch for Writing information to the 1602 LCD I2C<\/strong><\/p>\n\n\n\n
#include <LiquidCrystal_I2C.h> \/\/library for LCD\n\nLiquidCrystal_I2C lcd(0x27,16,2);\n\nvoid setup()\n{\nSerial.begin(9600);\nlcd.init(); \/\/initialize driver\nlcd.begin(16,2); \/\/16 by 2 character display\nlcd.backlight(); \/\/turn on backlight\nSerial.println(\"setup complete\");\n}\n\nvoid loop()\n{\ndelay(1000); \/\/wait a sec\nlcd.clear(); \/\/clear display\nlcd.setCursor(0,0); \/\/position 0 line 0\nlcd.print(\"Hello World\");\nSerial.print(\"Hello World\");\/\/ print to serial monitor\nlcd.setCursor(0,1); \/\/ position 0 line 1\nlcd.print(\"Goodbye World\");\/\/ print to serial monitor\n\n\/\/ rotate display lines to show sketch working\ndelay(5000); \/\/wait a sec\nlcd.clear(); \/\/clear display\nlcd.setCursor(0,1); \/\/position 0 line 1\nlcd.print(\"Hello World\");\nSerial.print(\"Hello World\");\/\/ print to serial monitor\nlcd.setCursor(0,0); \/\/ position 0 line 0\nlcd.print(\"Goodbye World\");\/\/ print to serial monitor<\/pre>\n\n\n\n
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Arduino – Programming the LCD 1602 with I2C Interface<\/strong><\/mark><\/p>\n\n\n\n
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Arduino – Programming the LCD 1602 with I2C Interface Return To Arduino Projects Identify your I2C Port Addresses Before attempting to program and I2C device with the Nano or UNO, use this I2C device scanner to find or confirm you I2C device HEX address LCD 1602 I2C and the UNO\/nano – Wiring Connections LCD 1602 […]<\/p>\n
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