# Measure Your WiFi Signal Strength Using Particle Photon

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## Introduction: Measure Your WiFi Signal Strength Using Particle Photon

WiFi has become an integral part of our life and daily billions of people use WiFi as a method to access the internet. But the range of WiFi is limited, unlike a cellular connection. A normal WiFi router usually has a range of about a 100m in clear sight and about 20m to 50m without clear sight (With walls or any other electronic appliance).

It would great to know the WiFi coverage of your Wireless router so you can place your router in a place at which you would usually get maximum range. The Ideal way to do it is to use a WiFi meter those devices are expensive and not easy to find.

So in this instructable I'm going to show you How to build a WiFi Signal Strength meter using the Particle Photon. If you don't know what the particle photon is or if you are getting started with the particle photon I would recommend you to check out my previous instructables and also the documentation at the particles website.

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## Step 1: Tools and Components

To start of with this instructable you will need,

## Step 2: Connecting Your Photon to the Internet

The Particle Photon uses an online based IDE to upload code to the photon using OTA Updates. To upload any code to the Photon you will need to get it connected to the Particle Cloud server from where you can program it.

To get it connected to the particle cloud server, you will need an active internet connection and an existing WiFi network.

Next on your smart phone download the Particle.io application and install it. Once it is installed go to particle.io and signup for a new account or if you have an existing account you can skip this part. Next login to your account on the Smart Phone application and you should be presented with the home screen. On the Home screen select add a new photon and follow the on screen Instructions.

Once you have connected the photon to the internet, the on board LED will breath Cyan and you can proceed to the next step.

## Step 3: Circuit

The circuit is quite simple, all you have to do is connect the OLED screen to the photon and there are two ways to do this depending on the OLED board you purchased. The 128x64 OLED screens come in two variants an SPI version and an I2C version.

If you are using the SPI version the connection goes as follows.

Particle Photon --------------- OLED Display

Pin D0 - DC pin of the OLED Display

Pin D1 - Rst or reset pin of the OLED Display

Pin D2 - D1 pin of the OLED Display

Pin D3 - D2 pin of the OLED

3V3 Pin - VCC of the OLED

Gnd - GND pin of the OLED

IF you are using the I2C version of the OLED the connetion is as follows

Particle Photon --------------- OLED Display

3V3 Pin - VCC of the OLED
Gnd - GND pin of the OLED

Pin D1 - SCL pin of the OLED

Pin D2 - SDA pin of the OLED\

After the connections you can proceed to the next step.

## Step 4: Testing

Before going to the actual design lets test out some test code, to verify that you have made all the connections right and everything is working fine.

The Below code will display the message HI I'm thepaticleguy you can edit this to your preference, the lines to edit in the code can be found in the loop part at the end of the program.

```/*  OLED          arduino     D0-----------10     D1-----------9
RST----------13
DC-----------11
VCC----------5V
GND----------GND*/
int SCL_PIN=3;//D0
int SDA_PIN=2; //D1
int RST_PIN=1;//RST
int DC_PIN=0; //DC
void LED_CLS(void);
void LED_Set_Pos(unsigned char x,unsigned char y);//Set the coordinate
void LED_WrDat(unsigned char data);   //Write Data
void LED_P6x8Char(unsigned char x,unsigned char y,unsigned char ch);
void LED_P6x8Str(unsigned char x,unsigned char y,unsigned char ch[]);
void LED_P8x16Str(unsigned char x,unsigned char y,unsigned char ch[]);
void LED_PrintBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char bmp[]);
void LED_Fill(unsigned char dat);
void LED_PrintValueC(unsigned char x, unsigned char y,char data);
void LED_PrintValueI(unsigned char x, unsigned char y, int data);
void LED_PrintValueF(unsigned char x, unsigned char y, float data, unsigned char num);
void LED_PrintEdge(void);
void LED_Cursor(unsigned char cursor_column, unsigned char cursor_row);
void LED_PrintLine(void);
const unsigned char F6x8[][6] =
{
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },   // sp
{ 0x00, 0x00, 0x00, 0x2f, 0x00, 0x00 },   // !
{ 0x00, 0x00, 0x07, 0x00, 0x07, 0x00 },   // "
{ 0x00, 0x14, 0x7f, 0x14, 0x7f, 0x14 },   // #
{ 0x00, 0x24, 0x2a, 0x7f, 0x2a, 0x12 },   // \$
{ 0x00, 0x62, 0x64, 0x08, 0x13, 0x23 },   // %
{ 0x00, 0x36, 0x49, 0x55, 0x22, 0x50 },   // &
{ 0x00, 0x00, 0x05, 0x03, 0x00, 0x00 },   // '
{ 0x00, 0x00, 0x1c, 0x22, 0x41, 0x00 },   // (
{ 0x00, 0x00, 0x41, 0x22, 0x1c, 0x00 },   // )
{ 0x00, 0x14, 0x08, 0x3E, 0x08, 0x14 },   // *
{ 0x00, 0x08, 0x08, 0x3E, 0x08, 0x08 },   // +
{ 0x00, 0x00, 0x00, 0xA0, 0x60, 0x00 },   // ,
{ 0x00, 0x08, 0x08, 0x08, 0x08, 0x08 },   // -
{ 0x00, 0x00, 0x60, 0x60, 0x00, 0x00 },   // .
{ 0x00, 0x20, 0x10, 0x08, 0x04, 0x02 },   // /
{ 0x00, 0x3E, 0x51, 0x49, 0x45, 0x3E },   // 0
{ 0x00, 0x00, 0x42, 0x7F, 0x40, 0x00 },   // 1
{ 0x00, 0x42, 0x61, 0x51, 0x49, 0x46 },   // 2
{ 0x00, 0x21, 0x41, 0x45, 0x4B, 0x31 },   // 3
{ 0x00, 0x18, 0x14, 0x12, 0x7F, 0x10 },   // 4
{ 0x00, 0x27, 0x45, 0x45, 0x45, 0x39 },   // 5
{ 0x00, 0x3C, 0x4A, 0x49, 0x49, 0x30 },   // 6
{ 0x00, 0x01, 0x71, 0x09, 0x05, 0x03 },   // 7
{ 0x00, 0x36, 0x49, 0x49, 0x49, 0x36 },   // 8
{ 0x00, 0x06, 0x49, 0x49, 0x29, 0x1E },   // 9
{ 0x00, 0x00, 0x36, 0x36, 0x00, 0x00 },   // :
{ 0x00, 0x00, 0x56, 0x36, 0x00, 0x00 },   // ;
{ 0x00, 0x08, 0x14, 0x22, 0x41, 0x00 },   // <
{ 0x00, 0x14, 0x14, 0x14, 0x14, 0x14 },   // =
{ 0x00, 0x00, 0x41, 0x22, 0x14, 0x08 },   // >
{ 0x00, 0x02, 0x01, 0x51, 0x09, 0x06 },   // ?
{ 0x00, 0x32, 0x49, 0x59, 0x51, 0x3E },   // @
{ 0x00, 0x7C, 0x12, 0x11, 0x12, 0x7C },   // A
{ 0x00, 0x7F, 0x49, 0x49, 0x49, 0x36 },   // B
{ 0x00, 0x3E, 0x41, 0x41, 0x41, 0x22 },   // C
{ 0x00, 0x7F, 0x41, 0x41, 0x22, 0x1C },   // D
{ 0x00, 0x7F, 0x49, 0x49, 0x49, 0x41 },   // E
{ 0x00, 0x7F, 0x09, 0x09, 0x09, 0x01 },   // F
{ 0x00, 0x3E, 0x41, 0x49, 0x49, 0x7A },   // G
{ 0x00, 0x7F, 0x08, 0x08, 0x08, 0x7F },   // H
{ 0x00, 0x00, 0x41, 0x7F, 0x41, 0x00 },   // I
{ 0x00, 0x20, 0x40, 0x41, 0x3F, 0x01 },   // J
{ 0x00, 0x7F, 0x08, 0x14, 0x22, 0x41 },   // K
{ 0x00, 0x7F, 0x40, 0x40, 0x40, 0x40 },   // L
{ 0x00, 0x7F, 0x02, 0x0C, 0x02, 0x7F },   // M
{ 0x00, 0x7F, 0x04, 0x08, 0x10, 0x7F },   // N
{ 0x00, 0x3E, 0x41, 0x41, 0x41, 0x3E },   // O
{ 0x00, 0x7F, 0x09, 0x09, 0x09, 0x06 },   // P
{ 0x00, 0x3E, 0x41, 0x51, 0x21, 0x5E },   // Q
{ 0x00, 0x7F, 0x09, 0x19, 0x29, 0x46 },   // R
{ 0x00, 0x46, 0x49, 0x49, 0x49, 0x31 },   // S
{ 0x00, 0x01, 0x01, 0x7F, 0x01, 0x01 },   // T
{ 0x00, 0x3F, 0x40, 0x40, 0x40, 0x3F },   // U
{ 0x00, 0x1F, 0x20, 0x40, 0x20, 0x1F },   // V
{ 0x00, 0x3F, 0x40, 0x38, 0x40, 0x3F },   // W
{ 0x00, 0x63, 0x14, 0x08, 0x14, 0x63 },   // X
{ 0x00, 0x07, 0x08, 0x70, 0x08, 0x07 },   // Y
{ 0x00, 0x61, 0x51, 0x49, 0x45, 0x43 },   // Z
{ 0x00, 0x00, 0x7F, 0x41, 0x41, 0x00 },   // [ 91
{ 0x00, 0x02, 0x04 ,0x08, 0x10, 0x20 },    // \92
{ 0x00, 0x00, 0x41, 0x41, 0x7F, 0x00 },   // ]
{ 0x00, 0x04, 0x02, 0x01, 0x02, 0x04 },   // ^
{ 0x00, 0x40, 0x40, 0x40, 0x40, 0x40 },   // _
{ 0x00, 0x00, 0x01, 0x02, 0x04, 0x00 },   // '
{ 0x00, 0x20, 0x54, 0x54, 0x54, 0x78 },   // a
{ 0x00, 0x7F, 0x48, 0x44, 0x44, 0x38 },   // b
{ 0x00, 0x38, 0x44, 0x44, 0x44, 0x20 },   // c
{ 0x00, 0x38, 0x44, 0x44, 0x48, 0x7F },   // d
{ 0x00, 0x38, 0x54, 0x54, 0x54, 0x18 },   // e
{ 0x00, 0x08, 0x7E, 0x09, 0x01, 0x02 },   // f
{ 0x00, 0x18, 0xA4, 0xA4, 0xA4, 0x7C },   // g
{ 0x00, 0x7F, 0x08, 0x04, 0x04, 0x78 },   // h
{ 0x00, 0x00, 0x44, 0x7D, 0x40, 0x00 },   // i
{ 0x00, 0x40, 0x80, 0x84, 0x7D, 0x00 },   // j
{ 0x00, 0x7F, 0x10, 0x28, 0x44, 0x00 },   // k
{ 0x00, 0x00, 0x41, 0x7F, 0x40, 0x00 },   // l
{ 0x00, 0x7C, 0x04, 0x18, 0x04, 0x78 },   // m
{ 0x00, 0x7C, 0x08, 0x04, 0x04, 0x78 },   // n
{ 0x00, 0x38, 0x44, 0x44, 0x44, 0x38 },   // o
{ 0x00, 0xFC, 0x24, 0x24, 0x24, 0x18 },   // p
{ 0x00, 0x18, 0x24, 0x24, 0x18, 0xFC },   // q
{ 0x00, 0x7C, 0x08, 0x04, 0x04, 0x08 },   // r
{ 0x00, 0x48, 0x54, 0x54, 0x54, 0x20 },   // s
{ 0x00, 0x04, 0x3F, 0x44, 0x40, 0x20 },   // t
{ 0x00, 0x3C, 0x40, 0x40, 0x20, 0x7C },   // u
{ 0x00, 0x1C, 0x20, 0x40, 0x20, 0x1C },   // v
{ 0x00, 0x3C, 0x40, 0x30, 0x40, 0x3C },   // w
{ 0x00, 0x44, 0x28, 0x10, 0x28, 0x44 },   // x
{ 0x00, 0x1C, 0xA0, 0xA0, 0xA0, 0x7C },   // y
{ 0x00, 0x44, 0x64, 0x54, 0x4C, 0x44 },   // z
{ 0x14, 0x14, 0x14, 0x14, 0x14, 0x14 }    // horiz lines
};
const unsigned char F8X16[]=
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,// 0
0x00,0x00,0x00,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x33,0x30,0x00,0x00,0x00,//!1
0x00,0x10,0x0C,0x06,0x10,0x0C,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//"2
0x40,0xC0,0x78,0x40,0xC0,0x78,0x40,0x00,0x04,0x3F,0x04,0x04,0x3F,0x04,0x04,0x00,//#3
0x00,0x70,0x88,0xFC,0x08,0x30,0x00,0x00,0x00,0x18,0x20,0xFF,0x21,0x1E,0x00,0x00,//\$4
0xF0,0x08,0xF0,0x00,0xE0,0x18,0x00,0x00,0x00,0x21,0x1C,0x03,0x1E,0x21,0x1E,0x00,//%5
0x00,0xF0,0x08,0x88,0x70,0x00,0x00,0x00,0x1E,0x21,0x23,0x24,0x19,0x27,0x21,0x10,//&6
0x10,0x16,0x0E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//'7
0x00,0x00,0x00,0xE0,0x18,0x04,0x02,0x00,0x00,0x00,0x00,0x07,0x18,0x20,0x40,0x00,//(8
0x00,0x02,0x04,0x18,0xE0,0x00,0x00,0x00,0x00,0x40,0x20,0x18,0x07,0x00,0x00,0x00,//)9
0x40,0x40,0x80,0xF0,0x80,0x40,0x40,0x00,0x02,0x02,0x01,0x0F,0x01,0x02,0x02,0x00,//*10
0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x1F,0x01,0x01,0x01,0x00,//+11
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xB0,0x70,0x00,0x00,0x00,0x00,0x00,//,12
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,//-13
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,0x00,0x00,//.14
0x00,0x00,0x00,0x00,0x80,0x60,0x18,0x04,0x00,0x60,0x18,0x06,0x01,0x00,0x00,0x00,///15
0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,//016
0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//117
0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,//218
0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00,//319
0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00,//420
0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00,//521
0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00,//622
0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00,//723
0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,//824
0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00,//925
0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,//:26
0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x60,0x00,0x00,0x00,0x00,//;27
0x00,0x00,0x80,0x40,0x20,0x10,0x08,0x00,0x00,0x01,0x02,0x04,0x08,0x10,0x20,0x00,//<28
0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x00,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//=29
0x00,0x08,0x10,0x20,0x40,0x80,0x00,0x00,0x00,0x20,0x10,0x08,0x04,0x02,0x01,0x00,>30
0x00,0x70,0x48,0x08,0x08,0x08,0xF0,0x00,0x00,0x00,0x00,0x30,0x36,0x01,0x00,0x00,//?31
0xC0,0x30,0xC8,0x28,0xE8,0x10,0xE0,0x00,0x07,0x18,0x27,0x24,0x23,0x14,0x0B,0x00,//@32
0x00,0x00,0xC0,0x38,0xE0,0x00,0x00,0x00,0x20,0x3C,0x23,0x02,0x02,0x27,0x38,0x20,//A33
0x08,0xF8,0x88,0x88,0x88,0x70,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x11,0x0E,0x00,//B34
0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,//C35
0x08,0xF8,0x08,0x08,0x08,0x10,0xE0,0x00,0x20,0x3F,0x20,0x20,0x20,0x10,0x0F,0x00,//D36
0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x20,0x23,0x20,0x18,0x00,//E37
0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x00,0x03,0x00,0x00,0x00,//F38
0xC0,0x30,0x08,0x08,0x08,0x38,0x00,0x00,0x07,0x18,0x20,0x20,0x22,0x1E,0x02,0x00,//G39
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x20,0x3F,0x21,0x01,0x01,0x21,0x3F,0x20,//H40
0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//I41
0x00,0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,0x00,//J42
0x08,0xF8,0x88,0xC0,0x28,0x18,0x08,0x00,0x20,0x3F,0x20,0x01,0x26,0x38,0x20,0x00,//K43
0x08,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x20,0x30,0x00,//L44
0x08,0xF8,0xF8,0x00,0xF8,0xF8,0x08,0x00,0x20,0x3F,0x00,0x3F,0x00,0x3F,0x20,0x00,//M45
0x08,0xF8,0x30,0xC0,0x00,0x08,0xF8,0x08,0x20,0x3F,0x20,0x00,0x07,0x18,0x3F,0x00,//N46
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,//O47
0x08,0xF8,0x08,0x08,0x08,0x08,0xF0,0x00,0x20,0x3F,0x21,0x01,0x01,0x01,0x00,0x00,//P48
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x18,0x24,0x24,0x38,0x50,0x4F,0x00,//Q49
0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,//R50
0x00,0x70,0x88,0x08,0x08,0x08,0x38,0x00,0x00,0x38,0x20,0x21,0x21,0x22,0x1C,0x00,//S51
0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//T52
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//U53
0x08,0x78,0x88,0x00,0x00,0xC8,0x38,0x08,0x00,0x00,0x07,0x38,0x0E,0x01,0x00,0x00,//V54
0xF8,0x08,0x00,0xF8,0x00,0x08,0xF8,0x00,0x03,0x3C,0x07,0x00,0x07,0x3C,0x03,0x00,//W55
0x08,0x18,0x68,0x80,0x80,0x68,0x18,0x08,0x20,0x30,0x2C,0x03,0x03,0x2C,0x30,0x20,//X56
0x08,0x38,0xC8,0x00,0xC8,0x38,0x08,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//Y57
0x10,0x08,0x08,0x08,0xC8,0x38,0x08,0x00,0x20,0x38,0x26,0x21,0x20,0x20,0x18,0x00,//Z58
0x00,0x00,0x00,0xFE,0x02,0x02,0x02,0x00,0x00,0x00,0x00,0x7F,0x40,0x40,0x40,0x00,//[59
0x00,0x0C,0x30,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x06,0x38,0xC0,0x00,//\60
0x00,0x02,0x02,0x02,0xFE,0x00,0x00,0x00,0x00,0x40,0x40,0x40,0x7F,0x00,0x00,0x00,//]61
0x00,0x00,0x04,0x02,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//^62
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,//_63
0x00,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//`64
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x19,0x24,0x22,0x22,0x22,0x3F,0x20,//a65
0x08,0xF8,0x00,0x80,0x80,0x00,0x00,0x00,0x00,0x3F,0x11,0x20,0x20,0x11,0x0E,0x00,//b66
0x00,0x00,0x00,0x80,0x80,0x80,0x00,0x00,0x00,0x0E,0x11,0x20,0x20,0x20,0x11,0x00,//c67
0x00,0x00,0x00,0x80,0x80,0x88,0xF8,0x00,0x00,0x0E,0x11,0x20,0x20,0x10,0x3F,0x20,//d68
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x22,0x22,0x22,0x22,0x13,0x00,//e69
0x00,0x80,0x80,0xF0,0x88,0x88,0x88,0x18,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//f70
0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x6B,0x94,0x94,0x94,0x93,0x60,0x00,//g71
0x08,0xF8,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//h72
0x00,0x80,0x98,0x98,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//i73
0x00,0x00,0x00,0x80,0x98,0x98,0x00,0x00,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,//j74
0x08,0xF8,0x00,0x00,0x80,0x80,0x80,0x00,0x20,0x3F,0x24,0x02,0x2D,0x30,0x20,0x00,//k75
0x00,0x08,0x08,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//l76
0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x20,0x3F,0x20,0x00,0x3F,0x20,0x00,0x3F,//m77
0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//n78
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//o79
0x80,0x80,0x00,0x80,0x80,0x00,0x00,0x00,0x80,0xFF,0xA1,0x20,0x20,0x11,0x0E,0x00,//p80
0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x0E,0x11,0x20,0x20,0xA0,0xFF,0x80,//q81
0x80,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x20,0x20,0x3F,0x21,0x20,0x00,0x01,0x00,//r82
0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x33,0x24,0x24,0x24,0x24,0x19,0x00,//s83
0x00,0x80,0x80,0xE0,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x1F,0x20,0x20,0x00,0x00,//t84
0x80,0x80,0x00,0x00,0x00,0x80,0x80,0x00,0x00,0x1F,0x20,0x20,0x20,0x10,0x3F,0x20,//unsigned char5
0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x00,0x01,0x0E,0x30,0x08,0x06,0x01,0x00,//v86
0x80,0x80,0x00,0x80,0x00,0x80,0x80,0x80,0x0F,0x30,0x0C,0x03,0x0C,0x30,0x0F,0x00,//w87
0x00,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x31,0x2E,0x0E,0x31,0x20,0x00,//x88
0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x80,0x81,0x8E,0x70,0x18,0x06,0x01,0x00,//y89
0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x21,0x30,0x2C,0x22,0x21,0x30,0x00,//z90
0x00,0x00,0x00,0x00,0x80,0x7C,0x02,0x02,0x00,0x00,0x00,0x00,0x00,0x3F,0x40,0x40,//{91
0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,//|92
0x00,0x02,0x02,0x7C,0x80,0x00,0x00,0x00,0x00,0x40,0x40,0x3F,0x00,0x00,0x00,0x00,//}93
0x00,0x06,0x01,0x01,0x02,0x02,0x04,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//~94
};
void LEDPIN_Init(void)
{
/* LED_SCL_Init;
LED_SDA_Init;
LED_RST_Init;
LED_DC_Init;*/
pinMode(SCL_PIN,OUTPUT);
pinMode(SDA_PIN,OUTPUT);
pinMode(RST_PIN,OUTPUT);
pinMode(DC_PIN,OUTPUT);
}
void LED_WrDat(unsigned char data)
{
unsigned char i = 8;
//LED_CS=0;
//LED_DCH;;;
digitalWrite(DC_PIN,HIGH);
//LED_SCLL;;;
digitalWrite(SCL_PIN,LOW);
while (i--)
{
if (data & 0x80)
{
digitalWrite(SDA_PIN,HIGH);;;;
}
else
{
digitalWrite(SDA_PIN,LOW);;;
}
//LED_SCLH;;;
digitalWrite(SCL_PIN,HIGH);;;
asm("nop");;;
//LED_SCLL;;;
digitalWrite(SCL_PIN,LOW);
data <<= 1;
}
//LED_CS=1;
}
void LED_WrCmd(unsigned char cmd)
{
unsigned char i = 8;
//LED_CS = 0;
//LED_DCL;;;
digitalWrite(DC_PIN,LOW);;;
//LED_SCLL;;;
digitalWrite(SCL_PIN,LOW);;;
while (i--)
{
if (cmd & 0x80)
{
//LED_SDAH;;;
digitalWrite(SDA_PIN,HIGH);;;
}
else
{
//LED_SDAL;;;
digitalWrite(SDA_PIN,LOW);;;
}
//LED_SCLH;;;
digitalWrite(SCL_PIN,HIGH);;;
asm("nop");;;
//LED_SCLL;;;
digitalWrite(SCL_PIN,LOW);;;
cmd <<= 1;
}
//LED_CS = 1;
}
void LED_Set_Pos(unsigned char x, unsigned char y)
{
LED_WrCmd(0xb0+y);
LED_WrCmd(((x&0xf0)>>4)|0x10);
LED_WrCmd((x&0x0f)|0x00);
}
void LED_Fill(unsigned char bmp_data)
{
unsigned char y,x;

for(y=0;y<8;y++)
{
LED_WrCmd(0xb0+y);
LED_WrCmd(0x00);
LED_WrCmd(0x10);
for(x=0;x<128;x++)
LED_WrDat(bmp_data);
}
}
void LED_CLS(void)
{
unsigned char y,x;
for(y=0;y<8;y++)
{
LED_WrCmd(0xb0+y);
LED_WrCmd(0x00);
LED_WrCmd(0x10);
for(x=0;x<128;x++)
LED_WrDat(0);
}
}
void LED_DLY_ms(unsigned int ms)
{
unsigned int a;
while(ms)
{
a=6675;
while(a--);
ms--;
}
return;
//  time_delay_ms(ms);
}
void SetStartColumn(unsigned char d)
{
// Default => 0x00
// Default => 0x10
}
{
LED_WrCmd(0x20);			// Set Memory Addressing Mode
LED_WrCmd(d);			// Default => 0x02
// 0x00 => Horizontal Addressing Mode
// 0x01 => Vertical Addressing Mode
// 0x02 => Page Addressing Mode
}
void SetColumnAddress(unsigned char a, unsigned char b)
{
LED_WrCmd(a);			// Default => 0x00 (Column Start Address)
LED_WrCmd(b);			// Default => 0x7F (Column End Address)
}
void SetPageAddress(unsigned char a, unsigned char b)
{
LED_WrCmd(a);			// Default => 0x00 (Page Start Address)
LED_WrCmd(b);			// Default => 0x07 (Page End Address)
}
void SetStartLine(unsigned char d)
{
LED_WrCmd(0x40|d);		// Set Display Start Line
// Default => 0x40 (0x00)
}
void SetContrastControl(unsigned char d)
{
LED_WrCmd(0x81);			// Set Contrast Control
LED_WrCmd(d);			// Default => 0x7F
}
void Set_Charge_Pump(unsigned char d)
{
LED_WrCmd(0x8D);			// Set Charge Pump
LED_WrCmd(0x10|d);		// Default => 0x10
// 0x10 (0x00) => Disable Charge Pump
// 0x14 (0x04) => Enable Charge Pump
}
void Set_Segment_Remap(unsigned char d)
{
LED_WrCmd(0xA0|d);		// Set Segment Re-Map
// Default => 0xA0
// 0xA0 (0x00) => Column Address 0 Mapped to SEG0
// 0xA1 (0x01) => Column Address 0 Mapped to SEG127
}
void Set_Entire_Display(unsigned char d)
{
LED_WrCmd(0xA4|d);		// Set Entire Display On / Off
// Default => 0xA4
// 0xA4 (0x00) => Normal Display
// 0xA5 (0x01) => Entire Display On
}
void Set_Inverse_Display(unsigned char d)
{
LED_WrCmd(0xA6|d);		// Set Inverse Display On/Off
// Default => 0xA6
// 0xA6 (0x00) => Normal Display
// 0xA7 (0x01) => Inverse Display On
}
void Set_Multiplex_Ratio(unsigned char d)
{
LED_WrCmd(0xA8);			// Set Multiplex Ratio
LED_WrCmd(d);			// Default => 0x3F (1/64 Duty)
}
void Set_Display_On_Off(unsigned char d)
{
LED_WrCmd(0xAE|d);		// Set Display On/Off
// Default => 0xAE
// 0xAE (0x00) => Display Off
// 0xAF (0x01) => Display On
}
void SetStartPage(unsigned char d)
{
// Default => 0xB0 (0x00)
}
void Set_Common_Remap(unsigned char d)
{
LED_WrCmd(0xC0|d);		// Set COM Output Scan Direction
// Default => 0xC0
// 0xC0 (0x00) => Scan from COM0 to 63
// 0xC8 (0x08) => Scan from COM63 to 0
}
void Set_Display_Offset(unsigned char d)
{
LED_WrCmd(0xD3);			// Set Display Offset
LED_WrCmd(d);			// Default => 0x00
}
void Set_Display_Clock(unsigned char d)
{
LED_WrCmd(0xD5);			// Set Display Clock Divide Ratio / Oscillator Frequency
LED_WrCmd(d);			// Default => 0x80
// D[3:0] => Display Clock Divider
// D[7:4] => Oscillator Frequency
}
void Set_Precharge_Period(unsigned char d)
{
LED_WrCmd(0xD9);			// Set Pre-Charge Period
LED_WrCmd(d);			// Default => 0x22 (2 Display Clocks [Phase 2] / 2 Display Clocks [Phase 1])
// D[3:0] => Phase 1 Period in 1~15 Display Clocks
// D[7:4] => Phase 2 Period in 1~15 Display Clocks
}
void Set_Common_Config(unsigned char d)
{
LED_WrCmd(0xDA);			// Set COM Pins Hardware Configuration
LED_WrCmd(0x02|d);		// Default => 0x12 (0x10)
// Alternative COM Pin Configuration
// Disable COM Left/Right Re-Map
}
void Set_VCOMH(unsigned char d)
{
LED_WrCmd(0xDB);			// Set VCOMH Deselect Level
LED_WrCmd(d);			// Default => 0x20 (0.77*VCC)
}
void Set_NOP(void)
{
LED_WrCmd(0xE3);			// Command for No Operation
}
void LED_Init(void)
{
unsigned char i;
LEDPIN_Init();
//	LED_PORT=0X0F;
//LED_SCLH;;;
//LED_RSTL;;;
digitalWrite(SCL_PIN,HIGH);;;
digitalWrite(RST_PIN,LOW);;;
//	for(i=0;i<100;i++)asm("nop");
LED_DLY_ms(50);
//LED_RSTH;;;
digitalWrite(RST_PIN,HIGH);
Set_Display_On_Off(0x00);  // Display Off (0x00/0x01)
Set_Display_Clock(0x80);  // Set Clock as 100 Frames/Sec
Set_Multiplex_Ratio(0x3F);  // 1/64 Duty (0x0F~0x3F)
Set_Display_Offset(0x00);  // Shift Mapping RAM Counter (0x00~0x3F)
SetStartLine(0x00);  // Set Mapping RAM Display Start Line (0x00~0x3F)
Set_Charge_Pump(0x04);  // Enable Embedded DC/DC Converter (0x00/0x04)
Set_Segment_Remap(0x01);  // Set SEG/Column Mapping
Set_Common_Remap(0x08);  // Set COM/Row Scan Direction
Set_Common_Config(0x10);  // Set Sequential Configuration (0x00/0x10)
SetContrastControl(0xCF); // Set SEG Output Current
Set_Precharge_Period(0xF1);  // Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
Set_VCOMH(0x40);  // Set VCOM Deselect Level
Set_Entire_Display(0x00);  // Disable Entire Display On (0x00/0x01)
Set_Inverse_Display(0x00);  // Disable Inverse Display On (0x00/0x01)
Set_Display_On_Off(0x01);  // Display On (0x00/0x01)
LED_Fill(0x00);                               //clear all
LED_Set_Pos(0,0);
}

void LED_P6x8Char(unsigned char x,unsigned char y,unsigned char ch)
{
unsigned char c=0,i=0,j=0;

c =ch-32;
if(x>122)
{
x=0;
y++;
}
LED_Set_Pos(x,y);
for(i=0;i<6;i++)
{
LED_WrDat(F6x8[c][i]);
}
}
void LED_P6x8Str(unsigned char x,unsigned char y, char ch[])
{
unsigned char c=0,i=0,j=0;
while (ch[j]!='\0')
{
c =ch[j]-32;
if(x>126)
{
x=0;
y++;
}
LED_Set_Pos(x,y);
for(i=0;i<6;i++)
{
LED_WrDat(F6x8[c][i]);
}
x+=6;
j++;
}
}
void LED_P8x16Str(unsigned char x,unsigned char y, char ch[])
{
unsigned char c=0,i=0,j=0;
while (ch[j]!='\0')
{
c =ch[j]-32;
if(x>120)
{
x=0;
y++;
}
LED_Set_Pos(x,y);
for(i=0;i<8;i++)
{
LED_WrDat(F8X16[(c<<4)+i]);
}
LED_Set_Pos(x,y+1);
for(i=0;i<8;i++)
{
LED_WrDat(F8X16[(c<<4)+i+8]);
}
x+=8;
j++;
}
}
void LED_PrintBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char bmp[])
{
int ii=0;
unsigned char x,y;
for(y=y0;y<=y1;y++)
{
LED_Set_Pos(x0,y);
for(x=x0;x
void LED_PrintValueC(unsigned char x, unsigned char y, char data)
{
unsigned char i,j,k;
if(data < 0)
{
LED_P6x8Char(x,y,'-');
data = - data;
}
else
{
LED_P6x8Char(x,y,'+');
}
i = data/100;
j = (data%100)/10;
k = data%10;
LED_P6x8Char(x+6,y,i+48);
LED_P6x8Char(x+12,y,j+48);
LED_P6x8Char(x+18,y,k+48);
}
void LED_PrintValueI(unsigned char x, unsigned char y, int data)
{
unsigned char i,j,k,l,m;
if(data < 0)
{
LED_P6x8Char(x,y,'-');
data = - data;
}
else
{
LED_P6x8Char(x,y,'+');
}

l  = data/10000;
m= (data%10000)/1000;
i = (data%1000)/100;
j = (data%100)/10;
k = data%10;
LED_P6x8Char(x+6,y,l+48);
LED_P6x8Char(x+12,y,m+48);
LED_P6x8Char(x+18,y,i+48);
LED_P6x8Char(x+24,y,j+48);
LED_P6x8Char(x+30,y,k+48);
}
void LED_PrintValueFP(unsigned char x, unsigned char y, unsigned int data, unsigned char num)
{
unsigned char m,i,j,k;
LED_P6x8Char(x, y, '.');
m= data/1000;
i = (data%1000)/100;
j = (data%100)/10;
k = data%10;
switch(num)
{
case 1:  LED_P6x8Char(x+6,y,k+48);
break;
case 2:  LED_P6x8Char(x+6,y,j+48);
LED_P6x8Char(x+12,y,k+48);
break;
case 3:LED_P6x8Char(x+6,y,i+48);
LED_P6x8Char(x+12,y,j+48);
LED_P6x8Char(x+18,y,k+48);
break;
case 4: LED_P6x8Char(x+6,y,m+48);
LED_P6x8Char(x+12,y,i+48);
LED_P6x8Char(x+18,y,j+48);
LED_P6x8Char(x+24,y,k+48);
break;
}
}
void LED_PrintValueF(unsigned char x, unsigned char y, float data, unsigned char num)
{
unsigned char l,m,i,j,k;
unsigned char databiti = 6;
unsigned int tempdataui = 0;
int tempdataii = (int)data;
long int tempdatalp = (long int)((data - (int)data)*10000);

if(data < 0.0000001)  LED_P6x8Char(x, y,'-');
else LED_P6x8Char(x, y,'+');
if(tempdataii < 0)tempdataii = - tempdataii;
tempdataui = tempdataii;
l  = tempdataui/10000;
m= (tempdataui%10000)/1000;
i = (tempdataui%1000)/100;
j = (tempdataui%100)/10;
k = tempdataui%10;
if (l != 0)
{
LED_P6x8Char(x+6,y,l+48);
LED_P6x8Char(x+12,y,m+48);
LED_P6x8Char(x+18,y,i+48);
LED_P6x8Char(x+24,y,j+48);
LED_P6x8Char(x+30,y,k+48);
}
else if(m != 0)
{
databiti = 5;
LED_P6x8Char(x+6,y,m+48);
LED_P6x8Char(x+12,y,i+48);
LED_P6x8Char(x+18,y,j+48);
LED_P6x8Char(x+24,y,k+48);
}
else if(i != 0)
{
databiti = 4;
LED_P6x8Char(x+6,y,i+48);
LED_P6x8Char(x+12,y,j+48);
LED_P6x8Char(x+18,y,k+48);
}
else if(j != 0)
{
databiti = 3;
LED_P6x8Char(x+6,y,j+48);
LED_P6x8Char(x+12,y,k+48);
}
else
{
databiti = 2;
LED_P6x8Char(x+6,y,k+48);
}
if(tempdatalp < 0)tempdatalp = - tempdatalp;
switch(num)
{
case 0: break;
case 1:  LED_PrintValueFP(x + databiti * 6, y, (unsigned int)(tempdatalp / 1000),num);break;
case 2:  LED_PrintValueFP(x + databiti * 6, y, (unsigned int)(tempdatalp / 100),num);break;
case 3:  LED_PrintValueFP(x + databiti * 6, y, (unsigned int)(tempdatalp / 10),num);break;
case 4:  LED_PrintValueFP(x + databiti * 6, y, (unsigned int)(tempdatalp),num);break;
}
}
void LED_Cursor(unsigned char cursor_column, unsigned char cursor_row)
{
if(cursor_row != 0)
{
if(cursor_column == 1) LED_Set_Pos(0, cursor_row + 2);
else  LED_Set_Pos(80 + (cursor_column - 2)*6, cursor_row + 2);
LED_WrDat(0xFF);
LED_WrDat(0xFF);
LED_WrDat(0xFF);
LED_WrDat(0xFF);
LED_WrDat(0xFF);
LED_WrDat(0xFF);
}
}
void setup()
{
LEDPIN_Init();
LED_Init();
}
void loop()
{
LED_P8x16Str(0,0,"Hi");
LED_P8x16Str(0,2,"I'm");
LED_P8x16Str(0,4,"TheParticleGuy");
LED_P8x16Str(0,6,"");
}```

## Step 5: Code

If you got the everything working from the previous step, you can now upload code on to the board. The Code uses WiFi.RSSI(), which is a built in particle function to determine the strength of the WiFi network it is connected to.

This function returns an integer ranging from -127 to -1. These represent the signal strength in dB, it returns 2 if it times out or looses any signal strength and 1 in case of any error with the WiFi module.

```/*  OLED          arduino     D0-----------10     D1-----------9
RST----------13
DC-----------11
VCC----------5V
GND----------GND*/
int SCL_PIN=3;//D0
int SDA_PIN=2; //D1
int RST_PIN=1;//RST
int DC_PIN=0; //DC void LED_CLS(void);
void LED_Set_Pos(unsigned char x,unsigned char y);//Set the coordinate
void LED_WrDat(unsigned char data);   //Write Data
void LED_P6x8Char(unsigned char x,unsigned char y,unsigned char ch);
void LED_P6x8Str(unsigned char x,unsigned char y,unsigned char ch[]);
void LED_P8x16Str(unsigned char x,unsigned char y,unsigned char ch[]); void LED_PrintBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char bmp[]);
void LED_Fill(unsigned char dat);
void LED_PrintValueC(unsigned char x, unsigned char y,char data);
void LED_PrintValueI(unsigned char x, unsigned char y, int data);
void LED_PrintValueF(unsigned char x, unsigned char y, float data, unsigned char num);
void LED_PrintEdge(void);
void LED_Cursor(unsigned char cursor_column, unsigned char cursor_row);
void LED_PrintLine(void);const unsigned char F6x8[][6] =
{
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },   // sp
{ 0x00, 0x00, 0x00, 0x2f, 0x00, 0x00 },   // !
{ 0x00, 0x00, 0x07, 0x00, 0x07, 0x00 },   // "
{ 0x00, 0x14, 0x7f, 0x14, 0x7f, 0x14 },   // #
{ 0x00, 0x24, 0x2a, 0x7f, 0x2a, 0x12 },   // \$
{ 0x00, 0x62, 0x64, 0x08, 0x13, 0x23 },   // %
{ 0x00, 0x36, 0x49, 0x55, 0x22, 0x50 },   // &
{ 0x00, 0x00, 0x05, 0x03, 0x00, 0x00 },   // '
{ 0x00, 0x00, 0x1c, 0x22, 0x41, 0x00 },   // (
{ 0x00, 0x00, 0x41, 0x22, 0x1c, 0x00 },   // )
{ 0x00, 0x14, 0x08, 0x3E, 0x08, 0x14 },   // *
{ 0x00, 0x08, 0x08, 0x3E, 0x08, 0x08 },   // +
{ 0x00, 0x00, 0x00, 0xA0, 0x60, 0x00 },   // ,
{ 0x00, 0x08, 0x08, 0x08, 0x08, 0x08 },   // -
{ 0x00, 0x00, 0x60, 0x60, 0x00, 0x00 },   // .
{ 0x00, 0x20, 0x10, 0x08, 0x04, 0x02 },   // /
{ 0x00, 0x3E, 0x51, 0x49, 0x45, 0x3E },   // 0
{ 0x00, 0x00, 0x42, 0x7F, 0x40, 0x00 },   // 1
{ 0x00, 0x42, 0x61, 0x51, 0x49, 0x46 },   // 2
{ 0x00, 0x21, 0x41, 0x45, 0x4B, 0x31 },   // 3
{ 0x00, 0x18, 0x14, 0x12, 0x7F, 0x10 },   // 4
{ 0x00, 0x27, 0x45, 0x45, 0x45, 0x39 },   // 5
{ 0x00, 0x3C, 0x4A, 0x49, 0x49, 0x30 },   // 6
{ 0x00, 0x01, 0x71, 0x09, 0x05, 0x03 },   // 7
{ 0x00, 0x36, 0x49, 0x49, 0x49, 0x36 },   // 8
{ 0x00, 0x06, 0x49, 0x49, 0x29, 0x1E },   // 9
{ 0x00, 0x00, 0x36, 0x36, 0x00, 0x00 },   // :
{ 0x00, 0x00, 0x56, 0x36, 0x00, 0x00 },   // ;
{ 0x00, 0x08, 0x14, 0x22, 0x41, 0x00 },   // <
{ 0x00, 0x14, 0x14, 0x14, 0x14, 0x14 },   // =
{ 0x00, 0x00, 0x41, 0x22, 0x14, 0x08 },   // >
{ 0x00, 0x02, 0x01, 0x51, 0x09, 0x06 },   // ?
{ 0x00, 0x32, 0x49, 0x59, 0x51, 0x3E },   // @
{ 0x00, 0x7C, 0x12, 0x11, 0x12, 0x7C },   // A
{ 0x00, 0x7F, 0x49, 0x49, 0x49, 0x36 },   // B
{ 0x00, 0x3E, 0x41, 0x41, 0x41, 0x22 },   // C
{ 0x00, 0x7F, 0x41, 0x41, 0x22, 0x1C },   // D
{ 0x00, 0x7F, 0x49, 0x49, 0x49, 0x41 },   // E
{ 0x00, 0x7F, 0x09, 0x09, 0x09, 0x01 },   // F
{ 0x00, 0x3E, 0x41, 0x49, 0x49, 0x7A },   // G
{ 0x00, 0x7F, 0x08, 0x08, 0x08, 0x7F },   // H
{ 0x00, 0x00, 0x41, 0x7F, 0x41, 0x00 },   // I
{ 0x00, 0x20, 0x40, 0x41, 0x3F, 0x01 },   // J
{ 0x00, 0x7F, 0x08, 0x14, 0x22, 0x41 },   // K
{ 0x00, 0x7F, 0x40, 0x40, 0x40, 0x40 },   // L
{ 0x00, 0x7F, 0x02, 0x0C, 0x02, 0x7F },   // M
{ 0x00, 0x7F, 0x04, 0x08, 0x10, 0x7F },   // N
{ 0x00, 0x3E, 0x41, 0x41, 0x41, 0x3E },   // O
{ 0x00, 0x7F, 0x09, 0x09, 0x09, 0x06 },   // P
{ 0x00, 0x3E, 0x41, 0x51, 0x21, 0x5E },   // Q
{ 0x00, 0x7F, 0x09, 0x19, 0x29, 0x46 },   // R
{ 0x00, 0x46, 0x49, 0x49, 0x49, 0x31 },   // S
{ 0x00, 0x01, 0x01, 0x7F, 0x01, 0x01 },   // T
{ 0x00, 0x3F, 0x40, 0x40, 0x40, 0x3F },   // U
{ 0x00, 0x1F, 0x20, 0x40, 0x20, 0x1F },   // V
{ 0x00, 0x3F, 0x40, 0x38, 0x40, 0x3F },   // W
{ 0x00, 0x63, 0x14, 0x08, 0x14, 0x63 },   // X
{ 0x00, 0x07, 0x08, 0x70, 0x08, 0x07 },   // Y
{ 0x00, 0x61, 0x51, 0x49, 0x45, 0x43 },   // Z
{ 0x00, 0x00, 0x7F, 0x41, 0x41, 0x00 },   // [ 91
{ 0x00, 0x02, 0x04 ,0x08, 0x10, 0x20 },    // \92
{ 0x00, 0x00, 0x41, 0x41, 0x7F, 0x00 },   // ]
{ 0x00, 0x04, 0x02, 0x01, 0x02, 0x04 },   // ^
{ 0x00, 0x40, 0x40, 0x40, 0x40, 0x40 },   // _
{ 0x00, 0x00, 0x01, 0x02, 0x04, 0x00 },   // '
{ 0x00, 0x20, 0x54, 0x54, 0x54, 0x78 },   // a
{ 0x00, 0x7F, 0x48, 0x44, 0x44, 0x38 },   // b
{ 0x00, 0x38, 0x44, 0x44, 0x44, 0x20 },   // c
{ 0x00, 0x38, 0x44, 0x44, 0x48, 0x7F },   // d
{ 0x00, 0x38, 0x54, 0x54, 0x54, 0x18 },   // e
{ 0x00, 0x08, 0x7E, 0x09, 0x01, 0x02 },   // f
{ 0x00, 0x18, 0xA4, 0xA4, 0xA4, 0x7C },   // g
{ 0x00, 0x7F, 0x08, 0x04, 0x04, 0x78 },   // h
{ 0x00, 0x00, 0x44, 0x7D, 0x40, 0x00 },   // i
{ 0x00, 0x40, 0x80, 0x84, 0x7D, 0x00 },   // j
{ 0x00, 0x7F, 0x10, 0x28, 0x44, 0x00 },   // k
{ 0x00, 0x00, 0x41, 0x7F, 0x40, 0x00 },   // l
{ 0x00, 0x7C, 0x04, 0x18, 0x04, 0x78 },   // m
{ 0x00, 0x7C, 0x08, 0x04, 0x04, 0x78 },   // n
{ 0x00, 0x38, 0x44, 0x44, 0x44, 0x38 },   // o
{ 0x00, 0xFC, 0x24, 0x24, 0x24, 0x18 },   // p
{ 0x00, 0x18, 0x24, 0x24, 0x18, 0xFC },   // q
{ 0x00, 0x7C, 0x08, 0x04, 0x04, 0x08 },   // r
{ 0x00, 0x48, 0x54, 0x54, 0x54, 0x20 },   // s
{ 0x00, 0x04, 0x3F, 0x44, 0x40, 0x20 },   // t
{ 0x00, 0x3C, 0x40, 0x40, 0x20, 0x7C },   // u
{ 0x00, 0x1C, 0x20, 0x40, 0x20, 0x1C },   // v
{ 0x00, 0x3C, 0x40, 0x30, 0x40, 0x3C },   // w
{ 0x00, 0x44, 0x28, 0x10, 0x28, 0x44 },   // x
{ 0x00, 0x1C, 0xA0, 0xA0, 0xA0, 0x7C },   // y
{ 0x00, 0x44, 0x64, 0x54, 0x4C, 0x44 },   // z
{ 0x14, 0x14, 0x14, 0x14, 0x14, 0x14 }    // horiz lines
};const unsigned char F8X16[]=
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,// 0
0x00,0x00,0x00,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x33,0x30,0x00,0x00,0x00,//!1
0x00,0x10,0x0C,0x06,0x10,0x0C,0x06,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//"2
0x40,0xC0,0x78,0x40,0xC0,0x78,0x40,0x00,0x04,0x3F,0x04,0x04,0x3F,0x04,0x04,0x00,//#3
0x00,0x70,0x88,0xFC,0x08,0x30,0x00,0x00,0x00,0x18,0x20,0xFF,0x21,0x1E,0x00,0x00,//\$4
0xF0,0x08,0xF0,0x00,0xE0,0x18,0x00,0x00,0x00,0x21,0x1C,0x03,0x1E,0x21,0x1E,0x00,//%5
0x00,0xF0,0x08,0x88,0x70,0x00,0x00,0x00,0x1E,0x21,0x23,0x24,0x19,0x27,0x21,0x10,//&6
0x10,0x16,0x0E,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//'7
0x00,0x00,0x00,0xE0,0x18,0x04,0x02,0x00,0x00,0x00,0x00,0x07,0x18,0x20,0x40,0x00,//(8
0x00,0x02,0x04,0x18,0xE0,0x00,0x00,0x00,0x00,0x40,0x20,0x18,0x07,0x00,0x00,0x00,//)9
0x40,0x40,0x80,0xF0,0x80,0x40,0x40,0x00,0x02,0x02,0x01,0x0F,0x01,0x02,0x02,0x00,//*10
0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x1F,0x01,0x01,0x01,0x00,//+11
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xB0,0x70,0x00,0x00,0x00,0x00,0x00,//,12
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,//-13
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,0x00,0x00,//.14
0x00,0x00,0x00,0x00,0x80,0x60,0x18,0x04,0x00,0x60,0x18,0x06,0x01,0x00,0x00,0x00,///15
0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,//016
0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//117
0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,//218
0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00,//319
0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00,//420
0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00,//521
0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00,//622
0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00,//723
0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,//824
0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00,//925
0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,//:26
0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x60,0x00,0x00,0x00,0x00,//;27
0x00,0x00,0x80,0x40,0x20,0x10,0x08,0x00,0x00,0x01,0x02,0x04,0x08,0x10,0x20,0x00,//<28
0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x00,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//=29
0x00,0x08,0x10,0x20,0x40,0x80,0x00,0x00,0x00,0x20,0x10,0x08,0x04,0x02,0x01,0x00,>30
0x00,0x70,0x48,0x08,0x08,0x08,0xF0,0x00,0x00,0x00,0x00,0x30,0x36,0x01,0x00,0x00,//?31
0xC0,0x30,0xC8,0x28,0xE8,0x10,0xE0,0x00,0x07,0x18,0x27,0x24,0x23,0x14,0x0B,0x00,//@32
0x00,0x00,0xC0,0x38,0xE0,0x00,0x00,0x00,0x20,0x3C,0x23,0x02,0x02,0x27,0x38,0x20,//A33
0x08,0xF8,0x88,0x88,0x88,0x70,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x11,0x0E,0x00,//B34
0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,//C35
0x08,0xF8,0x08,0x08,0x08,0x10,0xE0,0x00,0x20,0x3F,0x20,0x20,0x20,0x10,0x0F,0x00,//D36
0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x20,0x23,0x20,0x18,0x00,//E37
0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,0x20,0x3F,0x20,0x00,0x03,0x00,0x00,0x00,//F38
0xC0,0x30,0x08,0x08,0x08,0x38,0x00,0x00,0x07,0x18,0x20,0x20,0x22,0x1E,0x02,0x00,//G39
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x20,0x3F,0x21,0x01,0x01,0x21,0x3F,0x20,//H40
0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//I41
0x00,0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,0x00,//J42
0x08,0xF8,0x88,0xC0,0x28,0x18,0x08,0x00,0x20,0x3F,0x20,0x01,0x26,0x38,0x20,0x00,//K43
0x08,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,0x20,0x3F,0x20,0x20,0x20,0x20,0x30,0x00,//L44
0x08,0xF8,0xF8,0x00,0xF8,0xF8,0x08,0x00,0x20,0x3F,0x00,0x3F,0x00,0x3F,0x20,0x00,//M45
0x08,0xF8,0x30,0xC0,0x00,0x08,0xF8,0x08,0x20,0x3F,0x20,0x00,0x07,0x18,0x3F,0x00,//N46
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,//O47
0x08,0xF8,0x08,0x08,0x08,0x08,0xF0,0x00,0x20,0x3F,0x21,0x01,0x01,0x01,0x00,0x00,//P48
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,0x0F,0x18,0x24,0x24,0x38,0x50,0x4F,0x00,//Q49
0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,//R50
0x00,0x70,0x88,0x08,0x08,0x08,0x38,0x00,0x00,0x38,0x20,0x21,0x21,0x22,0x1C,0x00,//S51
0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//T52
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//U53
0x08,0x78,0x88,0x00,0x00,0xC8,0x38,0x08,0x00,0x00,0x07,0x38,0x0E,0x01,0x00,0x00,//V54
0xF8,0x08,0x00,0xF8,0x00,0x08,0xF8,0x00,0x03,0x3C,0x07,0x00,0x07,0x3C,0x03,0x00,//W55
0x08,0x18,0x68,0x80,0x80,0x68,0x18,0x08,0x20,0x30,0x2C,0x03,0x03,0x2C,0x30,0x20,//X56
0x08,0x38,0xC8,0x00,0xC8,0x38,0x08,0x00,0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//Y57
0x10,0x08,0x08,0x08,0xC8,0x38,0x08,0x00,0x20,0x38,0x26,0x21,0x20,0x20,0x18,0x00,//Z58
0x00,0x00,0x00,0xFE,0x02,0x02,0x02,0x00,0x00,0x00,0x00,0x7F,0x40,0x40,0x40,0x00,//[59
0x00,0x0C,0x30,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x06,0x38,0xC0,0x00,//\60
0x00,0x02,0x02,0x02,0xFE,0x00,0x00,0x00,0x00,0x40,0x40,0x40,0x7F,0x00,0x00,0x00,//]61
0x00,0x00,0x04,0x02,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//^62
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,//_63
0x00,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//`64
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x19,0x24,0x22,0x22,0x22,0x3F,0x20,//a65
0x08,0xF8,0x00,0x80,0x80,0x00,0x00,0x00,0x00,0x3F,0x11,0x20,0x20,0x11,0x0E,0x00,//b66
0x00,0x00,0x00,0x80,0x80,0x80,0x00,0x00,0x00,0x0E,0x11,0x20,0x20,0x20,0x11,0x00,//c67
0x00,0x00,0x00,0x80,0x80,0x88,0xF8,0x00,0x00,0x0E,0x11,0x20,0x20,0x10,0x3F,0x20,//d68
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x22,0x22,0x22,0x22,0x13,0x00,//e69
0x00,0x80,0x80,0xF0,0x88,0x88,0x88,0x18,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//f70
0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x6B,0x94,0x94,0x94,0x93,0x60,0x00,//g71
0x08,0xF8,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//h72
0x00,0x80,0x98,0x98,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//i73
0x00,0x00,0x00,0x80,0x98,0x98,0x00,0x00,0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,//j74
0x08,0xF8,0x00,0x00,0x80,0x80,0x80,0x00,0x20,0x3F,0x24,0x02,0x2D,0x30,0x20,0x00,//k75
0x00,0x08,0x08,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//l76
0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x20,0x3F,0x20,0x00,0x3F,0x20,0x00,0x3F,//m77
0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//n78
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//o79
0x80,0x80,0x00,0x80,0x80,0x00,0x00,0x00,0x80,0xFF,0xA1,0x20,0x20,0x11,0x0E,0x00,//p80
0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,0x0E,0x11,0x20,0x20,0xA0,0xFF,0x80,//q81
0x80,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x20,0x20,0x3F,0x21,0x20,0x00,0x01,0x00,//r82
0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x33,0x24,0x24,0x24,0x24,0x19,0x00,//s83
0x00,0x80,0x80,0xE0,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x1F,0x20,0x20,0x00,0x00,//t84
0x80,0x80,0x00,0x00,0x00,0x80,0x80,0x00,0x00,0x1F,0x20,0x20,0x20,0x10,0x3F,0x20,//unsigned char5
0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x00,0x01,0x0E,0x30,0x08,0x06,0x01,0x00,//v86
0x80,0x80,0x00,0x80,0x00,0x80,0x80,0x80,0x0F,0x30,0x0C,0x03,0x0C,0x30,0x0F,0x00,//w87
0x00,0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,0x20,0x31,0x2E,0x0E,0x31,0x20,0x00,//x88
0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,0x80,0x81,0x8E,0x70,0x18,0x06,0x01,0x00,//y89
0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x21,0x30,0x2C,0x22,0x21,0x30,0x00,//z90
0x00,0x00,0x00,0x00,0x80,0x7C,0x02,0x02,0x00,0x00,0x00,0x00,0x00,0x3F,0x40,0x40,//{91
0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,//|92
0x00,0x02,0x02,0x7C,0x80,0x00,0x00,0x00,0x00,0x40,0x40,0x3F,0x00,0x00,0x00,0x00,//}93
0x00,0x06,0x01,0x01,0x02,0x02,0x04,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//~94};void LEDPIN_Init(void)
{
/* LED_SCL_Init;
LED_SDA_Init;
LED_RST_Init;
LED_DC_Init;*/
pinMode(SCL_PIN,OUTPUT);
pinMode(SDA_PIN,OUTPUT);
pinMode(RST_PIN,OUTPUT);
pinMode(DC_PIN,OUTPUT);
}
void LED_WrDat(unsigned char data)
{
unsigned char i = 8;
//LED_CS=0;
//LED_DCH;;;
digitalWrite(DC_PIN,HIGH);
//LED_SCLL;;;
digitalWrite(SCL_PIN,LOW);
while (i--)
{
if (data & 0x80)
{
digitalWrite(SDA_PIN,HIGH);;;;
}
else
{
digitalWrite(SDA_PIN,LOW);;;
}
//LED_SCLH;;;
digitalWrite(SCL_PIN,HIGH);;;
asm("nop");;;
//LED_SCLL;;;
digitalWrite(SCL_PIN,LOW);
data <<= 1;
}
//LED_CS=1;
}
void LED_WrCmd(unsigned char cmd)
{
unsigned char i = 8;
//LED_CS = 0;
//LED_DCL;;;
digitalWrite(DC_PIN,LOW);;;
//LED_SCLL;;;
digitalWrite(SCL_PIN,LOW);;;
while (i--)
{
if (cmd & 0x80)
{
//LED_SDAH;;;
digitalWrite(SDA_PIN,HIGH);;;
}
else
{
//LED_SDAL;;;
digitalWrite(SDA_PIN,LOW);;;
}
//LED_SCLH;;;
digitalWrite(SCL_PIN,HIGH);;;
asm("nop");;;
//LED_SCLL;;;
digitalWrite(SCL_PIN,LOW);;;
cmd <<= 1;
}
//LED_CS = 1;
}
void LED_Set_Pos(unsigned char x, unsigned char y)
{
LED_WrCmd(0xb0+y);
LED_WrCmd(((x&0xf0)>>4)|0x10);
LED_WrCmd((x&0x0f)|0x00);
} void LED_Fill(unsigned char bmp_data)
{
unsigned char y,x;

for(y=0;y<8;y++)
{
LED_WrCmd(0xb0+y);
LED_WrCmd(0x00);
LED_WrCmd(0x10);
for(x=0;x<128;x++)
LED_WrDat(bmp_data);
}
} void LED_CLS(void)
{
unsigned char y,x;
for(y=0;y<8;y++)
{
LED_WrCmd(0xb0+y);
LED_WrCmd(0x00);
LED_WrCmd(0x10);
for(x=0;x<128;x++)
LED_WrDat(0);
}
}void LED_DLY_ms(unsigned int ms)
{
unsigned int a;
while(ms)
{
a=6675;
while(a--);
ms--;
}
return;
//  time_delay_ms(ms);
}void SetStartColumn(unsigned char d)
{
// Default => 0x00
// Default => 0x10
{
LED_WrCmd(0x20);			// Set Memory Addressing Mode
LED_WrCmd(d);			// Default => 0x02
// 0x00 => Horizontal Addressing Mode
// 0x01 => Vertical Addressing Mode
// 0x02 => Page Addressing Mode
}void SetColumnAddress(unsigned char a, unsigned char b)
{
LED_WrCmd(a);			// Default => 0x00 (Column Start Address)
LED_WrCmd(b);			// Default => 0x7F (Column End Address)
}void SetPageAddress(unsigned char a, unsigned char b)
{
LED_WrCmd(a);			// Default => 0x00 (Page Start Address)
LED_WrCmd(b);			// Default => 0x07 (Page End Address)
}void SetStartLine(unsigned char d)
{
LED_WrCmd(0x40|d);		// Set Display Start Line
// Default => 0x40 (0x00)
}void SetContrastControl(unsigned char d)
{
LED_WrCmd(0x81);			// Set Contrast Control
LED_WrCmd(d);			// Default => 0x7F
}void Set_Charge_Pump(unsigned char d)
{
LED_WrCmd(0x8D);			// Set Charge Pump
LED_WrCmd(0x10|d);		// Default => 0x10
// 0x10 (0x00) => Disable Charge Pump
// 0x14 (0x04) => Enable Charge Pump
}void Set_Segment_Remap(unsigned char d)
{
LED_WrCmd(0xA0|d);		// Set Segment Re-Map
// Default => 0xA0
// 0xA0 (0x00) => Column Address 0 Mapped to SEG0
// 0xA1 (0x01) => Column Address 0 Mapped to SEG127
}void Set_Entire_Display(unsigned char d)
{
LED_WrCmd(0xA4|d);		// Set Entire Display On / Off
// Default => 0xA4
// 0xA4 (0x00) => Normal Display
// 0xA5 (0x01) => Entire Display On
}void Set_Inverse_Display(unsigned char d)
{
LED_WrCmd(0xA6|d);		// Set Inverse Display On/Off
// Default => 0xA6
// 0xA6 (0x00) => Normal Display
// 0xA7 (0x01) => Inverse Display On
}void Set_Multiplex_Ratio(unsigned char d)
{
LED_WrCmd(0xA8);			// Set Multiplex Ratio
LED_WrCmd(d);			// Default => 0x3F (1/64 Duty)
}void Set_Display_On_Off(unsigned char d)
{
LED_WrCmd(0xAE|d);		// Set Display On/Off
// Default => 0xAE
// 0xAE (0x00) => Display Off
// 0xAF (0x01) => Display On
}void SetStartPage(unsigned char d)
{
// Default => 0xB0 (0x00)
}void Set_Common_Remap(unsigned char d)
{
LED_WrCmd(0xC0|d);		// Set COM Output Scan Direction
// Default => 0xC0
// 0xC0 (0x00) => Scan from COM0 to 63
// 0xC8 (0x08) => Scan from COM63 to 0
}void Set_Display_Offset(unsigned char d)
{
LED_WrCmd(0xD3);			// Set Display Offset
LED_WrCmd(d);			// Default => 0x00
}void Set_Display_Clock(unsigned char d)
{
LED_WrCmd(0xD5);			// Set Display Clock Divide Ratio / Oscillator Frequency
LED_WrCmd(d);			// Default => 0x80
// D[3:0] => Display Clock Divider
// D[7:4] => Oscillator Frequency
}void Set_Precharge_Period(unsigned char d)
{
LED_WrCmd(0xD9);			// Set Pre-Charge Period
LED_WrCmd(d);			// Default => 0x22 (2 Display Clocks [Phase 2] / 2 Display Clocks [Phase 1])
// D[3:0] => Phase 1 Period in 1~15 Display Clocks
// D[7:4] => Phase 2 Period in 1~15 Display Clocks
}void Set_Common_Config(unsigned char d)
{
LED_WrCmd(0xDA);			// Set COM Pins Hardware Configuration
LED_WrCmd(0x02|d);		// Default => 0x12 (0x10)
// Alternative COM Pin Configuration
// Disable COM Left/Right Re-Map
}void Set_VCOMH(unsigned char d)
{
LED_WrCmd(0xDB);			// Set VCOMH Deselect Level
LED_WrCmd(d);			// Default => 0x20 (0.77*VCC)
}void Set_NOP(void)
{
LED_WrCmd(0xE3);			// Command for No Operation
}void LED_Init(void)
{
unsigned char i;
LEDPIN_Init();
//	LED_PORT=0X0F;
//LED_SCLH;;;
//LED_RSTL;;;
digitalWrite(SCL_PIN,HIGH);;;
digitalWrite(RST_PIN,LOW);;;
//	for(i=0;i<100;i++)asm("nop");
LED_DLY_ms(50);
//LED_RSTH;;;
digitalWrite(RST_PIN,HIGH);
Set_Display_On_Off(0x00);  // Display Off (0x00/0x01)
Set_Display_Clock(0x80);  // Set Clock as 100 Frames/Sec
Set_Multiplex_Ratio(0x3F);  // 1/64 Duty (0x0F~0x3F)
Set_Display_Offset(0x00);  // Shift Mapping RAM Counter (0x00~0x3F)
SetStartLine(0x00);  // Set Mapping RAM Display Start Line (0x00~0x3F)
Set_Charge_Pump(0x04);  // Enable Embedded DC/DC Converter (0x00/0x04)
Set_Segment_Remap(0x01);  // Set SEG/Column Mapping
Set_Common_Remap(0x08);  // Set COM/Row Scan Direction
Set_Common_Config(0x10);  // Set Sequential Configuration (0x00/0x10)
SetContrastControl(0xCF); // Set SEG Output Current
Set_Precharge_Period(0xF1);  // Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
Set_VCOMH(0x40);  // Set VCOM Deselect Level
Set_Entire_Display(0x00);  // Disable Entire Display On (0x00/0x01)
Set_Inverse_Display(0x00);  // Disable Inverse Display On (0x00/0x01)
Set_Display_On_Off(0x01);  // Display On (0x00/0x01)
LED_Fill(0x00);                               //clear all
LED_Set_Pos(0,0);
}
void LED_P6x8Char(unsigned char x,unsigned char y,unsigned char ch)
{
unsigned char c=0,i=0,j=0;

c =ch-32;
if(x>122)
{
x=0;
y++;
}
LED_Set_Pos(x,y);
for(i=0;i<6;i++)
{
LED_WrDat(F6x8[c][i]);
}
}void LED_P6x8Str(unsigned char x,unsigned char y, char ch[])
{
unsigned char c=0,i=0,j=0;
while (ch[j]!='\0')
{
c =ch[j]-32;
if(x>126)
{
x=0;
y++;
}
LED_Set_Pos(x,y);
for(i=0;i<6;i++)
{
LED_WrDat(F6x8[c][i]);
}
x+=6;
j++;
}
}void LED_P8x16Str(unsigned char x,unsigned char y, char ch[])
{
unsigned char c=0,i=0,j=0;
while (ch[j]!='\0')
{
c =ch[j]-32;
if(x>120)
{
x=0;
y++;
}
LED_Set_Pos(x,y);
for(i=0;i<8;i++)
{
LED_WrDat(F8X16[(c<<4)+i]);
}
LED_Set_Pos(x,y+1);
for(i=0;i<8;i++)
{
LED_WrDat(F8X16[(c<<4)+i+8]);
}
x+=8;
j++;
}
}void LED_PrintBMP(unsigned char x0,unsigned char y0,unsigned char x1,unsigned char y1,unsigned char bmp[])
{
int ii=0;
unsigned char x,y;
for(y=y0;y<=y1;y++)
{
LED_Set_Pos(x0,y);
for(x=x0;xvoid LED_PrintValueC(unsigned char x, unsigned char y, char data)
{
unsigned char i,j,k;
if(data < 0)
{
LED_P6x8Char(x,y,'-');
data = - data;
}
else
{
LED_P6x8Char(x,y,'+');
}
i = data/100;
j = (data%100)/10;
k = data%10;
LED_P6x8Char(x+6,y,i+48);
LED_P6x8Char(x+12,y,j+48);
LED_P6x8Char(x+18,y,k+48);
}void LED_PrintValueI(unsigned char x, unsigned char y, int data)
{
unsigned char i,j,k,l,m;
if(data < 0)
{
LED_P6x8Char(x,y,'-');
data = - data;
}
else
{
LED_P6x8Char(x,y,'+');
}

l  = data/10000;
m= (data%10000)/1000;
i = (data%1000)/100;
j = (data%100)/10;
k = data%10;
LED_P6x8Char(x+6,y,l+48);
LED_P6x8Char(x+12,y,m+48);
LED_P6x8Char(x+18,y,i+48);
LED_P6x8Char(x+24,y,j+48);
LED_P6x8Char(x+30,y,k+48);
} void LED_PrintValueFP(unsigned char x, unsigned char y, unsigned int data, unsigned char num)
{
unsigned char m,i,j,k;
LED_P6x8Char(x, y, '.');
m= data/1000;
i = (data%1000)/100;
j = (data%100)/10;
k = data%10;
switch(num)
{
case 1:  LED_P6x8Char(x+6,y,k+48);
break;
case 2:  LED_P6x8Char(x+6,y,j+48);
LED_P6x8Char(x+12,y,k+48);
break;
case 3:LED_P6x8Char(x+6,y,i+48);
LED_P6x8Char(x+12,y,j+48);
LED_P6x8Char(x+18,y,k+48);
break;
case 4: LED_P6x8Char(x+6,y,m+48);
LED_P6x8Char(x+12,y,i+48);
LED_P6x8Char(x+18,y,j+48);
LED_P6x8Char(x+24,y,k+48);
break;
}
} void LED_PrintValueF(unsigned char x, unsigned char y, float data, unsigned char num)
{
unsigned char l,m,i,j,k;
unsigned char databiti = 6;
unsigned int tempdataui = 0;
int tempdataii = (int)data;
long int tempdatalp = (long int)((data - (int)data)*10000);

if(data < 0.0000001)  LED_P6x8Char(x, y,'-');
else LED_P6x8Char(x, y,'+');
if(tempdataii < 0)tempdataii = - tempdataii;
tempdataui = tempdataii;
l  = tempdataui/10000;
m= (tempdataui%10000)/1000;
i = (tempdataui%1000)/100;
j = (tempdataui%100)/10;
k = tempdataui%10;
if (l != 0)
{
LED_P6x8Char(x+6,y,l+48);
LED_P6x8Char(x+12,y,m+48);
LED_P6x8Char(x+18,y,i+48);
LED_P6x8Char(x+24,y,j+48);
LED_P6x8Char(x+30,y,k+48);
}
else if(m != 0)
{
databiti = 5;
LED_P6x8Char(x+6,y,m+48);
LED_P6x8Char(x+12,y,i+48);
LED_P6x8Char(x+18,y,j+48);
LED_P6x8Char(x+24,y,k+48);
}
else if(i != 0)
{
databiti = 4;
LED_P6x8Char(x+6,y,i+48);
LED_P6x8Char(x+12,y,j+48);
LED_P6x8Char(x+18,y,k+48);
}
else if(j != 0)
{
databiti = 3;
LED_P6x8Char(x+6,y,j+48);
LED_P6x8Char(x+12,y,k+48);
}
else
{
databiti = 2;
LED_P6x8Char(x+6,y,k+48);
}
if(tempdatalp < 0)tempdatalp = - tempdatalp;
switch(num)
{
case 0: break;
case 1:  LED_PrintValueFP(x + databiti * 6, y, (unsigned int)(tempdatalp / 1000),num);break;
case 2:  LED_PrintValueFP(x + databiti * 6, y, (unsigned int)(tempdatalp / 100),num);break;
case 3:  LED_PrintValueFP(x + databiti * 6, y, (unsigned int)(tempdatalp / 10),num);break;
case 4:  LED_PrintValueFP(x + databiti * 6, y, (unsigned int)(tempdatalp),num);break;
}
} void LED_Cursor(unsigned char cursor_column, unsigned char cursor_row)
{
if(cursor_row != 0)
{
if(cursor_column == 1) LED_Set_Pos(0, cursor_row + 2);
else  LED_Set_Pos(80 + (cursor_column - 2)*6, cursor_row + 2);
LED_WrDat(0xFF);
LED_WrDat(0xFF);
LED_WrDat(0xFF);
LED_WrDat(0xFF);
LED_WrDat(0xFF);
LED_WrDat(0xFF);
}
}
void setup()
{
LEDPIN_Init();
LED_Init();
}
void loop()
{
LED_P8x16Str(0,0,"WiFi");
LED_P8x16Str(0,2,"Strength");
LED_P8x16Str(0,4,char(strength));
LED_P8x16Str(0,6,"dB");
}```

## Step 6: Going Further

Hope you had fun building the signal meter, there are a lot more projects you can build with the particle photon and the OLED display and the circuit used in this instructable is the standard connections to the OLED display.

Leave a comment with what you built using an OLED display and a photon or any other microcontroller.

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