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UART Serial LCD Module

Character LCM screen is a common display device, we provide 16×2, 8×2, 20×4 with Yellow / Blue black light LCD on iStore. But these LCD need more than 6 pins for controlling and you need to know the control register and time series.

It’s a bit difficult for beginners to familiar registers and timing, so here we provide the UART Serial LCD module. It can be controlled easily by serial commands, and just need 2 data pins for connection.

We provide 7 commands to control the LCD display, Each command is composed by CMD+[Parameter]+’ ; ‘ . The [parameter] is optional but the ‘ ; ‘  is necessary.

1. Clean the Screen
CMD : sc  Parameter : Null;
Example : sc; [ Screen clean ]
2. Set backlight
CMD : sb  Parameter :1 or 0 [1: Set the backlight on; 0: Set the backlight off ]
Example :
sb1; [ Backlight on ]
sb0; [ Backlight off ]
3. Set coordinate
CMD : sd  Parameter :C,R [C: the column (C = [0:1]); R: the row (R = [0:15])]
Example :
sd0,0;  [ move the coordinate to column 0 and row 0 ]
sd1,15;  [ move the coordinate to column 1 and row 15 ]
4. Send string
CMD : ss  Parameter : Char String
ss12345;  [ Send the char string and display on LCD ]
5. Set the cursor on/off
CMD su Parameter: 0/1 [0: Set the cursor off, 1: Set the cursor on]
su0; [ Cursor off ]
su1; [ Cursor on ]
6. Set the cursor type
CMD sf, Parameter: 0/1 [0: Set the cursor blink off, 1: Set the cursor blink on]
sf0; [ Set the cursor blink off ]
sf1; [ Set the cursor blink on ]
7. Move the cursor
CMD sm  Parameter: 0/1 [0: Move the cursor left , 1: Move the cursor right ]
sm0; [ shift left ]
sm1; [ shift right ]

After you send the command, the LCD module will return the message of execution results – ‘O’ means action complete ; ‘E’ means command error. You should send the new command after you receiving the reply massage for LCD module.

It’s very easy to show the string on UART serial LCD module:

void setup()
  Serial.print("ssItead Studio;");
  Serial.print("ssSrial 1602 LCD;");

Download the datasheet of these UART Serial LCD module here.