Thankyou blynk team for making IOT easy. I have a doubt regarding LCD widget in blynk can i able to display the character of my choice from blynk widget to 5110 screen or a IIC oled display? please help me in using LCD widget
LCD widget interfacing to 5110 or OLED
krishnan
#3
Please forgive for my english and some basic . i Am new to blynk and coding. After referring many example i am able to get information from code to 5110 display but not from Blynk widget screen to 5110 display.Please help me with highlighted code what should i do to get the code from LCD widget to 5110 lcd screen or there any simple method to transfer from blynk widget to real LCD screen.i am just geeting from LCD string.Thanks in advance
#define BLYNK_PRINT Serial
#include SPI.h
#include Ethernet.h
#include ESP8266WiFi.h
#include BlynkSimpleEsp8266.h
define PIN_SCE 12 //pin GPIO12 ON ESP , pin SCE ON LCD
define PIN_RESET 2 //pin GPI02 on ESP , pin RST on LCD
define PIN_DC 14 //pin GPIO14 on ESP , pin DC on LCD
define PIN_SDIN 4 //pin GPIO4 on ESP , pin SDIN on LCD
define PIN_SCLK 5 //pin GPIO5 on ESP , pin SLCK on LCD
define LCD_X 84
define LCD_Y 48
define LCD_COMMAND 0
define LCD_DATA 1
char auth[] = "xxxxxxxxxxxxxxx";
char ssid[] = "krishnan";
char pass[] = "xxxxxx";
void LCDWrite(byte data_or_command, byte data) {
digitalWrite(PIN_DC, data_or_command);
digitalWrite(PIN_SCE, LOW);
shiftOut(PIN_SDIN, PIN_SCLK, MSBFIRST, data);
digitalWrite(PIN_SCE, HIGH);
}
static const byte ASCII[][5] = {
{0x00, 0x00, 0x00, 0x00, 0x00} // 20
,{0x00, 0x00, 0x5f, 0x00, 0x00} // 21 !
,{0x00, 0x07, 0x00, 0x07, 0x00} // 22 "
,{0x14, 0x7f, 0x14, 0x7f, 0x14} // 23 #
,{0x24, 0x2a, 0x7f, 0x2a, 0x12} // 24 $
,{0x23, 0x13, 0x08, 0x64, 0x62} // 25 %
,{0x36, 0x49, 0x55, 0x22, 0x50} // 26 &
,{0x00, 0x05, 0x03, 0x00, 0x00} // 27 '
,{0x00, 0x1c, 0x22, 0x41, 0x00} // 28 (
,{0x00, 0x41, 0x22, 0x1c, 0x00} // 29 )
,{0x14, 0x08, 0x3e, 0x08, 0x14} // 2a *
,{0x08, 0x08, 0x3e, 0x08, 0x08} // 2b +
,{0x00, 0x50, 0x30, 0x00, 0x00} // 2c ,
,{0x08, 0x08, 0x08, 0x08, 0x08} // 2d -
,{0x00, 0x60, 0x60, 0x00, 0x00} // 2e .
,{0x20, 0x10, 0x08, 0x04, 0x02} // 2f /
,{0x3e, 0x51, 0x49, 0x45, 0x3e} // 30 0
,{0x00, 0x42, 0x7f, 0x40, 0x00} // 31 1
,{0x42, 0x61, 0x51, 0x49, 0x46} // 32 2
,{0x21, 0x41, 0x45, 0x4b, 0x31} // 33 3
,{0x18, 0x14, 0x12, 0x7f, 0x10} // 34 4
,{0x27, 0x45, 0x45, 0x45, 0x39} // 35 5
,{0x3c, 0x4a, 0x49, 0x49, 0x30} // 36 6
,{0x01, 0x71, 0x09, 0x05, 0x03} // 37 7
,{0x36, 0x49, 0x49, 0x49, 0x36} // 38 8
,{0x06, 0x49, 0x49, 0x29, 0x1e} // 39 9
,{0x00, 0x36, 0x36, 0x00, 0x00} // 3a :
,{0x00, 0x56, 0x36, 0x00, 0x00} // 3b ;
,{0x08, 0x14, 0x22, 0x41, 0x00} // 3c <
,{0x14, 0x14, 0x14, 0x14, 0x14} // 3d =
,{0x00, 0x41, 0x22, 0x14, 0x08} // 3e >
,{0x02, 0x01, 0x51, 0x09, 0x06} // 3f ?
,{0x32, 0x49, 0x79, 0x41, 0x3e} // 40 @
,{0x7e, 0x11, 0x11, 0x11, 0x7e} // 41 A
,{0x7f, 0x49, 0x49, 0x49, 0x36} // 42 B
,{0x3e, 0x41, 0x41, 0x41, 0x22} // 43 C
,{0x7f, 0x41, 0x41, 0x22, 0x1c} // 44 D
,{0x7f, 0x49, 0x49, 0x49, 0x41} // 45 E
,{0x7f, 0x09, 0x09, 0x09, 0x01} // 46 F
,{0x3e, 0x41, 0x49, 0x49, 0x7a} // 47 G
,{0x7f, 0x08, 0x08, 0x08, 0x7f} // 48 H
,{0x00, 0x41, 0x7f, 0x41, 0x00} // 49 I
,{0x20, 0x40, 0x41, 0x3f, 0x01} // 4a J
,{0x7f, 0x08, 0x14, 0x22, 0x41} // 4b K
,{0x7f, 0x40, 0x40, 0x40, 0x40} // 4c L
,{0x7f, 0x02, 0x0c, 0x02, 0x7f} // 4d M
,{0x7f, 0x04, 0x08, 0x10, 0x7f} // 4e N
,{0x3e, 0x41, 0x41, 0x41, 0x3e} // 4f O
,{0x7f, 0x09, 0x09, 0x09, 0x06} // 50 P
,{0x3e, 0x41, 0x51, 0x21, 0x5e} // 51 Q
,{0x7f, 0x09, 0x19, 0x29, 0x46} // 52 R
,{0x46, 0x49, 0x49, 0x49, 0x31} // 53 S
,{0x01, 0x01, 0x7f, 0x01, 0x01} // 54 T
,{0x3f, 0x40, 0x40, 0x40, 0x3f} // 55 U
,{0x1f, 0x20, 0x40, 0x20, 0x1f} // 56 V
,{0x3f, 0x40, 0x38, 0x40, 0x3f} // 57 W
,{0x63, 0x14, 0x08, 0x14, 0x63} // 58 X
,{0x07, 0x08, 0x70, 0x08, 0x07} // 59 Y
,{0x61, 0x51, 0x49, 0x45, 0x43} // 5a Z
,{0x00, 0x7f, 0x41, 0x41, 0x00} // 5b [
,{0x02, 0x04, 0x08, 0x10, 0x20} // 5c
,{0x00, 0x41, 0x41, 0x7f, 0x00} // 5d ]
,{0x04, 0x02, 0x01, 0x02, 0x04} // 5e ^
,{0x40, 0x40, 0x40, 0x40, 0x40} // 5f _
,{0x00, 0x01, 0x02, 0x04, 0x00} // 60 `
,{0x20, 0x54, 0x54, 0x54, 0x78} // 61 a
,{0x7f, 0x48, 0x44, 0x44, 0x38} // 62 b
,{0x38, 0x44, 0x44, 0x44, 0x20} // 63 c
,{0x38, 0x44, 0x44, 0x48, 0x7f} // 64 d
,{0x38, 0x54, 0x54, 0x54, 0x18} // 65 e
,{0x08, 0x7e, 0x09, 0x01, 0x02} // 66 f
,{0x0c, 0x52, 0x52, 0x52, 0x3e} // 67 g
,{0x7f, 0x08, 0x04, 0x04, 0x78} // 68 h
,{0x00, 0x44, 0x7d, 0x40, 0x00} // 69 i
,{0x20, 0x40, 0x44, 0x3d, 0x00} // 6a j
,{0x7f, 0x10, 0x28, 0x44, 0x00} // 6b k
,{0x00, 0x41, 0x7f, 0x40, 0x00} // 6c l
,{0x7c, 0x04, 0x18, 0x04, 0x78} // 6d m
,{0x7c, 0x08, 0x04, 0x04, 0x78} // 6e n
,{0x38, 0x44, 0x44, 0x44, 0x38} // 6f o
,{0x7c, 0x14, 0x14, 0x14, 0x08} // 70 p
,{0x08, 0x14, 0x14, 0x18, 0x7c} // 71 q
,{0x7c, 0x08, 0x04, 0x04, 0x08} // 72 r
,{0x48, 0x54, 0x54, 0x54, 0x20} // 73 s
,{0x04, 0x3f, 0x44, 0x40, 0x20} // 74 t
,{0x3c, 0x40, 0x40, 0x20, 0x7c} // 75 u
,{0x1c, 0x20, 0x40, 0x20, 0x1c} // 76 v
,{0x3c, 0x40, 0x30, 0x40, 0x3c} // 77 w
,{0x44, 0x28, 0x10, 0x28, 0x44} // 78 x
,{0x0c, 0x50, 0x50, 0x50, 0x3c} // 79 y
,{0x44, 0x64, 0x54, 0x4c, 0x44} // 7a z
,{0x00, 0x08, 0x36, 0x41, 0x00} // 7b {
,{0x00, 0x00, 0x7f, 0x00, 0x00} // 7c |
,{0x00, 0x41, 0x36, 0x08, 0x00} // 7d }
,{0x10, 0x08, 0x08, 0x10, 0x08} // 7e ~
,{0x78, 0x46, 0x41, 0x46, 0x78} // 7f DEL
};
//Clears the LCD by writing zeros to the entire screen
void LCDClear(void) {
for (int index = 0 ; index < (LCD_X * LCD_Y / 8) ; index++)
LCDWrite(LCD_DATA, 0x00);
}
void LCDCharacter(char character) {
LCDWrite(LCD_DATA, 0x00); //Blank vertical line padding
for (int index = 0 ; index < 5 ; index++)
LCDWrite(LCD_DATA, ASCII[character - 0x20][index]);
//0x20 is the ASCII character for Space (' '). The font table starts with this character
LCDWrite(LCD_DATA, 0x00); //Blank vertical line padding
}
//Given a string of characters, one by one is passed to the LCD
void LCDString(char *characters) {
while (*characters)
LCDCharacter(*characters++);
}
void LCDInit(void) {
//Configure control pins
pinMode(PIN_SCE, OUTPUT);
pinMode(PIN_RESET, OUTPUT);
pinMode(PIN_DC, OUTPUT);
pinMode(PIN_SDIN, OUTPUT);
pinMode(PIN_SCLK, OUTPUT);
//Reset the LCD to a known state
digitalWrite(PIN_RESET, LOW);
digitalWrite(PIN_RESET, HIGH);
LCDWrite(LCD_COMMAND, 0x21); //Tell LCD that extended commands follow
LCDWrite(LCD_COMMAND, 0xB0); //Set LCD Vop (Contrast): Try 0xB1(good @ 3.3V) or 0xBF if your display is too dark
LCDWrite(LCD_COMMAND, 0x04); //Set Temp coefficent
LCDWrite(LCD_COMMAND, 0x14); //LCD bias mode 1:48: Try 0x13 or 0x14
LCDWrite(LCD_COMMAND, 0x20); //We must send 0x20 before modifying the display control mode
LCDWrite(LCD_COMMAND, 0x0C); //Set display control, normal mode. 0x0D for inverse
}
**WidgetLCD LCD(V1);**
void setup()
{
// Debug console
Serial.begin(9600);
Blynk.begin(auth, ssid, pass);
LCDInit();
LCDClear();; //Use it to clear the LCD Widget
**lcd.print(4, 0, "Hello");**
lcd.print(4, 1, "World");
**LCDString("krishnan");**
**}**
void loop()
{
Blynk.run();
}
'''
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First… Always >FORMAT YOUR CODE< when posting it in the forums… makes it easier to read.
LCD Widget doesn’t send data to anything. You send simple text and/or numbers to it.
It is NOT a graphical display like the 5110 or OLED.
http://docs.blynk.cc/#widgets-displays-lcd
WidgetLCD lcd(V1); // In app assign virtual pin V1 to the Widget LCD in advanced mode.
lcd.clear(); // Clear the LCD Widget screen
lcd.print(4, 0, "Hello"); // print Hello on the 1st line, starting at the 4th character in.
lcd.print(6, 1, "World"); // print World on the 2st line, starting at the 6th character in.
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