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

Code

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

1. include <Wire.h>
2. 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

github.com/Seeed-Studio/OLED_Display_128X64 github

wiki.seeedstudio.com/Grove-UART_Wifi wiki