Re: A4 and A5 of arduino is ??? on ESP8266
Posted:
Sat Nov 26, 2016 1:32 pmby martinayotte
You seems that have declared your lcd as "u8g" not "ldc", so, you should call it "ug8.begin(0,2);"
Re: A4 and A5 of arduino is ??? on ESP8266
Posted:
Sat Nov 26, 2016 2:27 pmby Lxx33
When I put u8g.begin(0,2); I get an error
Code: Select allvoid draw(void) {
u8g.begin(0,2); // Here I put it, but don't know if this is the right place.
// graphic commands to redraw the complete screen should be placed here
u8g.setFont(u8g_font_unifont);
//u8g.setFont(u8g_font_osb21);
u8g.drawStr( 0, 22, "Hello World!");
}
void setup(void) { The error show
Code: Select allno matching function for call to 'U8GLIB_SSD1306_128X64::begin(int, int)'
u8g.begin(0,2); I really appreciate you all helping me
Re: A4 and A5 of arduino is ??? on ESP8266
Posted:
Sat Nov 26, 2016 3:28 pmby edwin
Some of these replies confuse me a bit as I thought that the GPIO numbers did not directly translate to D numbers. Thus if one uses D0 and D2 as SDA and SCL the declaration Wire.begin(0,2) is wrong as that initializes pins D3 and D4.
If one uses D0 and D2, the initialization shld be Wire.begin(D0,D2) or Wire.begin(16,4)
Or have Icompletely misunderstood things??
Re: A4 and A5 of arduino is ??? on ESP8266
Posted:
Sat Nov 26, 2016 7:59 pmby ex-egll
Hi, also new to this, I got the following code to work on an OLED with Pins
VCC
GND
SCL
SDA
Code: Select all-- OLED Display demo
-- March, 2016
-- @kayakpete | pete@hoffswell.com
-- Hardware:
-- ESP-12E Devkit
-- 4 pin I2C OLED 128x64 Display Module
-- Connections:
-- ESP -- OLED
-- 3v3 -- VCC
-- GND -- GND
-- D1 -- SDA
-- D2 -- SCL
-- Variables
sda = 1 -- SDA Pin
scl = 2 -- SCL Pin
function init_OLED(sda,scl) --Set up the u8glib lib
sla = 0x3C
i2c.setup(0, sda, scl, i2c.SLOW)
disp = u8g.ssd1306_128x64_i2c(sla)
disp:setFont(u8g.font_6x10)
disp:setFontRefHeightExtendedText()
disp:setDefaultForegroundColor()
disp:setFontPosTop()
--disp:setRot180() -- Rotate Display if needed
end
function print_OLED()
disp:firstPage()
repeat
disp:drawFrame(2,2,126,62)
disp:drawStr(5, 10, str1)
disp:drawStr(5, 20, str2)
disp:drawCircle(18, 47, 14)
until disp:nextPage() == false
end
-- Main Program
str1=" Hello World!!"
str2=" @kayakpete"
init_OLED(sda,scl)
print_OLED()