ESP is not able to work in station mode after softAP.

[hetii]

Hello.

After configure esp as AP like below code I was not able to back to station mode (for egg by using htttp_get example).

The only way how I restore this functionality was to burn nodemcu and then after setting connectivity to my access point I was able to run http_get example.

` sdk_wifi_set_opmode(SOFTAP_MODE); //sdk_station_config struct sdk_softap_config apconfig;

if(sdk_wifi_softap_get_config(&apconfig)){     

    strncpy((char *)apconfig.ssid, "my_nice_ssid", 32);
    strncpy((char *)apconfig.password, "some_secret_password", 32);

    apconfig.authmode = AUTH_WPA2_PSK;
    apconfig.ssid_hidden = 0;
    apconfig.max_connection = 4;
    apconfig.channel=7;

    if(!sdk_wifi_softap_set_config(&apconfig)){
        printf("ESP8266 not set ap config!\r\n");
    }
}
struct ip_info info;
IP4_ADDR(&info.ip, 192, 168, 22, 1);
//IP4_ADDR(&info.gw, 192, 168, 22, 1);
IP4_ADDR(&info.netmask, 255, 255, 255, 0);`

[projectgus]

Wow, that's an unexpectedly big problem!

Running esptool.py erase_flash should get you back to an empty ESP flash in any case, and remove any WiFi settings that were helpfully saved by the binary SDK.

However this is still a bug! I'll try to reproduce over the next couple of days.

[alainmaes]

You enable the AP and that config is remembered. To avoid that you could use sdk_wifi_softap_set_config_current so the ESP does not remember this after a reboot/reflash.

Then when you enable station in another firmware based on esp-open-rtos you end up in station+softAp mode. And in that mode there is a bug that causes the AP to become the default interface causing all outgoing connections to go through there.

In core/app_main.c: if (sdk_g_ic.s.wifi_mode == 3) { sdk_wifi_station_start(); sdk_wifi_softap_start(); netif_set_default(sdk_g_ic.v.softap_netif_info->netif); }

The above should become: if (sdk_g_ic.s.wifi_mode == 3) { sdk_wifi_station_start(); sdk_wifi_softap_start(); netif_set_default(sdk_g_ic.v.station_netif_info->netif); }

I noticed connection to an MQTT server failed as soon as I set up the AP. So I started digging. For me applying the cange did the trick.