Grove - UART WiFi

UART Wifi

WiFi Chip = ESP8266

LEDs : 3 LEDs [Power] [WiFi] [AT Command]

1 Button: Short press to Reset | Long press to enter UART boot mode

Input voltage: 3V / 5V
Baud Rate: 115200

Antenna Type = On-board

images

Assemblage

Dans le wiki le code est écrit pour Seeeduino Lite, qui utilisé Serial1
pour les autres contrôleurs mentionnés ici il faut remplacer par Serial

le code ici indiqué est compatible pour les 3 contrôleurs

Seeeduino V4.2
Seeeduino Nano
Seeeduino Cortex-M0+

Le code a besoin de : OLED Display 0.96 inches connecté au port I2C
et du Grove-UART Wifi présenté ici connecté au port SERIAL

Code

// 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);
    }
}

Liens

www.seeedstudio.com/Grove-Uart-Wifi-p-2495.html shop bazar

wiki.seeedstudio.com/Grove-UART_Wifi wiki

Libraries

github.com/Seeed-Studio/OLED_Display_128X64 github

github.com/Seeed-Studio/OLED_Display_128X64/archive/master.zip ZIP