ESP8266 Station mode Scan for routers

2019-09-25T11:30:33+08:00

Well they pretty much all do the same but how about the Civ Ship Parts station in District 07 of HoL. No stuuter in Station scan mode is the exception rather than the rule for me.

Statistics: Posted by Tofd8lger — Wed Sep 25, 2019 11:30 am

[ESP8266] Station mode: Scan for routers

2015-02-28T11:24:00+08:00

Sample code below is based on ESP8266_NONOS_SDK.

ESP8266 init with station mode, then it can scan routers nearby.

Code:

/******************************************************************************
 * FunctionName : scan_done
 * Description  : scan done callback
 * Parameters   :  arg: contain the aps information; 
                          status: scan over status
 * Returns      : none
*******************************************************************************/
void ICACHE_FLASH_ATTR
scan_done(void *arg, STATUS status)
{
  uint8 ssid[33];
  char temp[128];

  if (status == OK)
  {
    struct bss_info *bss_link = (struct bss_info *)arg;

    while (bss_link != NULL)
    {
      os_memset(ssid, 0, 33);
      if (os_strlen(bss_link->ssid) <= 32)
      {
        os_memcpy(ssid, bss_link->ssid, os_strlen(bss_link->ssid));
      }
      else
      {
        os_memcpy(ssid, bss_link->ssid, 32);
      }
      os_printf("(%d,\"%s\",%d,\""MACSTR"\",%d)\r\n",
                 bss_link->authmode, ssid, bss_link->rssi,
                 MAC2STR(bss_link->bssid),bss_link->channel);
      bss_link = bss_link->next.stqe_next;
    }
  }
  else
  {
     os_printf("scan fail !!!\r\n");
  }

}

/******************************************************************************
 * FunctionName : user_scan
 * Description  : wifi scan, only can be called after system init done.
 * Parameters   :  none
 * Returns      : none
*******************************************************************************/
void ICACHE_FLASH_ATTR
user_scan(void)
{
   if(wifi_get_opmode() == SOFTAP_MODE)
   {
     os_printf("ap mode can't scan !!!\r\n");
     return;
   }
   wifi_station_scan(NULL,scan_done);

}


/******************************************************************************
 * FunctionName : user_init
 * Description  : entry of user application, init user function here
 * Parameters   : none
 * Returns      : none
*******************************************************************************/
void user_init(void)
{
    os_printf("SDK version:%s\n", system_get_sdk_version());
   
   //Set softAP + station mode 
   wifi_set_opmode(STATIONAP_MODE); 

   // wifi scan has to after system init done.
   system_init_done_cb(user_scan);

}

If you want to scan a specific AP, for example, scan an AP of which SSID is "ESP8266". You only need to set the value of parameter "SSID" in structure "scan_config" when calling wifi_station_scan.

Code:

void ICACHE_FLASH_ATTR
user_scan(void)
{
   if(wifi_get_opmode() == SOFTAP_MODE)
   {
     os_printf("ap mode can't scan !!!\r\n");
     return;
   }
   struct scan_config config;

   os_memset(&config, 0, sizeof(config));

   config.ssid = "ESP8266";
   
   wifi_station_scan(&config,scan_done);

}

Statistics: Posted by ESP_Faye — Sat Feb 28, 2015 11:24 am

ESP8266 Developer Zone

ESP8266 Station mode Scan for routers

[ESP8266] Station mode: Scan for routers