View source for Grove - UART WiFi

=== UART Wifi ===

WiFi Chip = <b>ESP8266</b><br>

LEDs : <b>3 LEDs</b> [Power] [WiFi] [AT Command]<br>

1 Button: <b>Short press</b> to Reset | <b>Long press</b> to enter UART boot mode

Input voltage: 3V / 5V<br>
Baud Rate: 115200<br>

Antenna Type = On-board

=== images ===

[[File:Grove - UART Wifi V2 front.jpg | 300px]]
[[File:Grove - UART Wifi V2 back.jpg | 300px]]

[[File:Grove - UART Wifi V2.jpg | 400px]]

=== Assemblage ===


Dans le wiki le code est écrit pour Seeeduino Lite, qui utilisé <font color=red>Serial1</font><br>
pour les autres contrôleurs mentionnés ici il faut remplacer par <font color=red>Serial</font><br>

le code ici indiqué est compatible pour les 3 contrôleurs<br>

[[Seeeduino V4.2| Seeeduino V4.2]]<br>
[[Seeeduino Nano| Seeeduino Nano]]<br>
[[Seeeduino Cortex-M0+| Seeeduino Cortex-M0+]]<br>

Le code a besoin 
[[OLED Display 0.96| OLED Display 0.96 inches ]] connecté au <b>port I2C</b><br>
<font color=red>Grove-UART Wifi</font> connecté au <b>port SERIAL</b>

=== Code ===

<pre>
// test grove - uart wifi
// scan ap and display on Grove - OLED 0.96'
// Loovee @ 2015-7-28

#include <Wire.h>
#include <SeeedOLED.h>

char ap_buf[30][16];
int ap_cnt = 0;

void setup()
{
    Serial.begin(115200);

    delay(3000);
    Wire.begin();
    SeeedOled.init();                   // initialze SEEED OLED display

    SeeedOled.clearDisplay();           // clear the screen and set start position to top left corner
    SeeedOled.setNormalDisplay();       // Set display to normal mode (i.e non-inverse mode)
    SeeedOled.setPageMode();            // Set addressing mode to Page Mode

}


void loop()
{
    ap_cnt = 0;
    SeeedOled.clearDisplay();
    SeeedOled.setTextXY(3,0);    
    SeeedOled.putString("Wifi Scan..."); 

    cmd_send("AT+CWLAP");
    wait_result();
    
    display_ap();
    delay(5000);
}

// send command
void cmd_send(char *cmd)
{
    if(NULL == cmd)return;
    Serial.println(cmd);
}


// wait result of ap scan
// +CWLAP:(3,"360WiFi-UZ",-81,"08:57:00:01:61:ec",1)
void wait_result()
{
    while(1)
    {
LOOP1:
        char c1=0;
        if(Serial.available()>=2)
        {
            c1 = Serial.read();
            if(c1 == 'O' && 'K' == Serial.read())return;       // OK means over
        }
        
        if('('==c1)
        {
            while(Serial.available()<3);
            Serial.read();
            Serial.read();
            Serial.read();

            int d = 0;
            while(1)
            {
                if(Serial.available() && '"' == Serial.read());      // find "
                {
                    while(1)
                    {
                        if(Serial.available())
                        {
                            char c = Serial.read();
                            ap_buf[ap_cnt][d++] = c;
                            if(c == '"' || d==16)
                            {
                                ap_buf[ap_cnt][d-1] = '\0';
                                ap_cnt++;
                                goto LOOP1;
                            }
                        }
                    }
                }
            }
        }
    }
}

// display
void display_ap()
{
    char strtmp[16];
    sprintf(strtmp, "get %d ap", ap_cnt);
    
    SeeedOled.clearDisplay();           // clear
    SeeedOled.setTextXY(3,3);           // Set the cursor to Xth Page, Yth Column
    SeeedOled.putString(strtmp);        // Print the String
 
    delay(2000);
    
    int cnt = ap_cnt;
    int offset = 0;
    while(1)
    {
        SeeedOled.clearDisplay(); 
        if(cnt>=8)
        {
            for(int i=0; i<8; i++)
            {
                SeeedOled.setTextXY(i,0);           // Set the cursor to Xth Page, Yth Column
                SeeedOled.putString(ap_buf[8*offset+i]);        // Print the String
            }
            cnt-=8;
            offset++;
        }
        else 
        {
            for(int i=0; i<cnt; i++)
            {
                SeeedOled.setTextXY(i,0);           // Set the cursor to Xth Page, Yth Column
                SeeedOled.putString(ap_buf[8*offset+i]);        // Print the String
            }
            
            return;
        }
        
        delay(2000);
    }
}

</pre>

=== Liens ===

[https://www.seeedstudio.com/Grove-Uart-Wifi-p-2495.html www.seeedstudio.com/Grove-Uart-Wifi-p-2495.html] <b>shop bazar</b>

[http://wiki.seeedstudio.com/Grove-UART_Wifi/ wiki.seeedstudio.com/Grove-UART_Wifi] <b>wiki</b>

=== Libraries ===

[https://github.com/Seeed-Studio/OLED_Display_128X64 github.com/Seeed-Studio/OLED_Display_128X64] <b>github</b>


[https://github.com/Seeed-Studio/OLED_Display_128X64/archive/master.zip github.com/Seeed-Studio/OLED_Display_128X64/archive/master.zip] <b>github</b>