[ESP8266] Station mode: Scan for routers

ESP_Faye
Posts: 1641
Joined: Mon Oct 27, 2014 11:08 am

[ESP8266] Station mode: Scan for routers

Postby ESP_Faye » Sat Feb 28, 2015 11:24 am

Sample code below is based on ESP8266_NONOS_SDK.

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

Code: Select all

/******************************************************************************
 * 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: Select all

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);

}

Tofd8lger
Posts: 1
Joined: Sat May 20, 2017 5:36 am

ESP8266 Station mode Scan for routers

Postby Tofd8lger » Wed Sep 25, 2019 11:30 am

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.









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