Editing Wemos D1 Mini (section)

=Shields=
==lithium (LiPo) Battery shield==
[[File:Battery v1.3.0 1 16x9.jpg|640px|left]]<br clear=all>
<br>
lithium (LiPo) Battery shield, charging & boost Specifications:

{| class="wikitable"
! style="font-weight:bold;" | Features
! style="font-weight:bold;" | 
|-
| Charging Voltage
| max: 10V, recommend: 5V
|-
| Charging Current
| max: 1A
|-
| Lithium Battery voltage
| 3.3-4.2V
|-
| Boost Power Supply
| 5V(max: 1A)
|}

<br><br>
;Pins used:
{| class="wikitable"
! style="font-weight:bold;" | D1 mini
! style="font-weight:bold;" | Shield
|-
| 5V
| 5V(max: 1A) Power Supply
|-
| GND
| GND
|}

<br><br>
{| class="wikitable"
! style="font-weight:bold;" | Port
! style="font-weight:bold;" | Usage
|-
| PH2-2.0MM (Port 1)
| Connect to lithium Battery (normal 3.3-4.2V)
|-
| Micro USB (Port 2)
| Charging port (normal 5V)
|-
| Green LED
| lights when charging is completed
|-
| Red LED
| lights when charging
|-
| J1
| setting max charging current, 0.5A or 1A.
|-
| J2
| Connect battery to A0
|}
<br><br>
[[File:Wemos Battery Shield Schematic.png|frame|left|Battery shield Schematic]]<br clear=all>

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==OLED Shield==
[https://www.diymore.cc/collections/new-product/products/ssd1306-oled-shield-for-wemos-d1-mini-iic-i2c-iot-0-66-inch-64x48-for-arduino-compatible-module-for-wemos-d1-mini-3-3v?_pos=4&_sid=09a8137d7&_ss=r Website]<br>
[[File:OLED Shield.jpg|300px]]<br clear=all>
[[File:OLED Shield bottom.jpg|300px]]<br clear=all>
<br>
Sketch that uses this shield: <b>ssd1306_64x48_i2c-ds18b20.ino</b></br>
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==ssd1306 OLED display==
[[File:Ssd1306 OLED.jpg|200px]]<br clear=all>

;notes<br>
[http://oleddisplay.squix.ch/#/home Font converter]<br>
<br>

;*NOTE- Not Tested
{| class="wikitable" 
|-
! method
! Display Control
|-
| init();
| Initialize the display
|-
| end();
| Free the memory used by the display
|-
| resetDisplay();
| Cycle through the initialization
|-
| reconnect();
| Connect again to the display through I2C
|-
| displayOn();
| Turn the display on
|-
| displayOff();
| Turn the display offs
|-
| clear();
| Clear the local pixel buffer
|-
| display();
| Write the buffer to the display memory
|-
| invertDisplay();
| Inverted display mode
|-
| normalDisplay();
| Normal display mode
|-
| setContrast(contrast, precharge, comdetect);
| Set display contrast. Normal=100
|-
| setBrightness(int);
| Convenience method to access
|-
| flipScreenVertically();
| Turn the display upside down
|-
| mirrorScreen();
| Draw the screen mirrored
|}
<br>

{| class="wikitable" 
|-
! Method
! Text operations
|-
| drawString(x, y, String text);
| Draws a String at the given location.
|-
| drawStringMaxWidth(x, y, maxLineWidth, String text);
| Draws a String with a maximum width at the given location.
|-
| ugetStringWidth(const char* text, ulength);
| Returns the width of the const char* with the current font settings
|-
| ugetStringWidth(String text);
| Convencience method for the const char version
|-
| setTextAlignment(OLEDDISPLAY_TEXT_ALIGNMENT textAlignment);
| Specifies text anchor point: TEXT_ALIGN_LEFT, TEXT_ALIGN_CENTER, TEXT_ALIGN_RIGHT, TEXT_ALIGN_CENTER_BOTH
|-
| setFont(const uint8_t* fontData);
| Sets the current font: ArialMT_Plain_10, ArialMT_Plain_16, ArialMT_Plain_24
|}
<br>

{| class="wikitable" 
|-
! Method
! Drawing functions
|-
| setColor(OLEDDISPLAY_COLOR color);
| Set the color of pixel operations: BLACK, WHITE, INVERSE
|-
| setPixel(x, y);
| Draw a pixel at given position
|-
| drawLine(x0, y0, x1, y1);
| Draw a line from position 0 to position 1
|-
| drawRect(x, y, width, height);
| Draw the border of a rectangle at the given location
|-
| fillRect(x, y, width, height);
| Fill the rectangle
|-
| drawCircle(x, y, radius);
| Draw the border of a circle
|-
| fillCircle(x, y, radius);
| Fill circle
|-
| drawHorizontalLine(x, y, length);
| Draw a line horizontally
|-
| drawVerticalLine(x, y, length);
| Draw a line vertically
|-
| drawProgressBar(ux, uy, uwidth, uheight, progress);
| Draws a rounded progress bar (0-100) with outer dimensions given by width and height.
|-
| drawFastImage(x, y, width, height, const *image);
| Draw a bitmap in the internal image format
|-
| drawXbm(x, y, width, height, const char* xbm);
| Draw a XBM
|}
<br>

coding samples:<br>
 <nowiki>/*
   Reference:
   D:\River Documents\Arduino\Wemos\D1 Mini\OledHelloWorld

   Reference:
   https://blog.hau.me/2018/12/26/i2c-oled-display-on-a-wemos-d1-mini/

*/

#include <Wire.h>
#include "SSD1306.h"

SSD1306  display(0x3C, D2, D1); // I2C Address, SDA and SCL pins

void setup()   {
  display.init();
  display.flipScreenVertically();
  display.drawString(0, 0, "Hello world");
  display.display();
}

void loop() {
}
</nowiki>

 <nowiki>/*
   This sketch demonstrates custom fonts, using a font created at: http://oleddisplay.squix.ch/#/home
   Reference: https://blog.hau.me/2018/12/26/i2c-oled-display-on-a-wemos-d1-mini/

*/

#include <Wire.h>
#include "SSD1306.h"
#include "font.h"

SSD1306  display(0x3C, D2, D1); // I2C address, and pins D2 (SDA/Serial Data), and D1 (SCK/Serial Clock).

void setup()   {
  
  display.init();
  display.flipScreenVertically();
  display.setFont((uint8_t *) Dialog_plain_16); // Font generated here: http://oleddisplay.squix.ch/#/home
  display.drawString(0, 0, "hello world-16");

  display.setFont((uint8_t *) Dialog_plain_36); // Font generated here: http://oleddisplay.squix.ch/#/home
  display.drawString(0, 20, "XYZ-36");

  display.display();
}

void loop() {
}</nowiki>

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