ESP32 Forum

I am using the simplest wifi station example... i am passing the WIFI usr and pass through uart to the esp32s2. the first time i pass those values to the board, everything is ok. But now i want to pass again those values while the board is connected to wifi.. so i guess i need to disconnect the board from wifi and then connect it again with the new usr and pass..

But i dont know how to disconnect the board from the wifi...

Could anybody help me here?


Thank you so so much in advance

Best regards

You should be able to do `esp_wifi_disconnect()`, reconfigure the wifi with the new credentials and info, then `esp_wifi_connect()`. If your event handler is written like the example, it should go through the connection and authentication process again.

Thank you so much for your response.

I use exactly the same functions as in wifi station example idf.

I did this:

esp_wifi_stop();
wifi_init_sta();
esp_wifi_start();

But the system reboots with the following info:



I (32410) wifi:state: run -> init (0)
I (32410) wifi:pm stop, total sleep time: 17494143 us / 30438569 us

I (32410) wifi<1,0>, old:<1,0>, ap:<255,255>, sta:<1,0>, prof:1
W (32420) wifi:hmac tx: stop, discard
W (32420) wifi:hmac tx: stop, discard
I (33460) wifi:flush txq
I (33460) wifi:stop sw txq
I (33460) wifi:lmac stop hw txq
ESP_ERROR_CHECK failed: esp_err_t 0x103 (ESP_ERR_INVALID_STATE) at 0x4002a350
0x4002a350: _esp_error_check_failed at C:/Users/Nasib/Desktop/esp-idf/components
/esp_common/src/esp_err.c:45

file: "../main/gpio_example_main.c" line 533
func: wifi_init_sta
expression: esp_event_loop_create_default()

abort() was called at PC 0x4002a353 on core 0
0x4002a353: _esp_error_check_failed at C:/Users/Nasib/Desktop/esp-idf/components
/esp_common/src/esp_err.c:46


Backtrace:0x4002b493:0x3ffd3f90 0x4002bccd:0x3ffd3fb0 0x40031faa:0x3ffd3fd0 0x40
02a353:0x3ffd4040 0x4008607b:0x3ffd4060 0x400869a7:0x3ffd41c0 0x40084163:0x3ffd4
220 0x4002bcd5:0x3ffd4250
0x4002b493: panic_abort at C:/Users/Nasib/Desktop/esp-idf/components/esp_system/
panic.c:330

0x4002bccd: esp_system_abort at C:/Users/Nasib/Desktop/esp-idf/components/esp_sy
stem/system_api.c:106

0x40031faa: abort at C:/Users/Nasib/Desktop/esp-idf/components/newlib/abort.c:46

0x4002a353: _esp_error_check_failed at C:/Users/Nasib/Desktop/esp-idf/components
/esp_common/src/esp_err.c:46

0x4008607b: wifi_init_sta at C:\Users\Nasib\eclipse-workspace\gpio\build/../main
/gpio_example_main.c:533 (discriminator 1)

0x400869a7: app_main at C:\Users\Nasib\eclipse-workspace\gpio\build/../main/gpio
_example_main.c:1034

0x40084163: main_task at C:/Users/Nasib/Desktop/esp-idf/components/esp32s2/cpu_s
tart.c:453 (discriminator 2)

0x4002bcd5: vPortTaskWrapper at C:/Users/Nasib/Desktop/esp-idf/components/freert
os/xtensa/port.c:143



ELF file SHA256: 04f8503afd36ced3

Rebooting...

You shouldn't have to go through the entire event creation and initialization process. `wifi_init_sta()` was written with the intention of being called during initialization. I think you just need to:
And the event handler would handle the rest.

Thank you so much for your answer. This is still a challenge. If i am connected to a network with one pass and one usr. I can use those functions perfectly.. but if i want to change to another network (changing the usr and pass.. ) and i use those functions the system reboots...

What does your monitor show in that case, leading up to the reboot? It should log the wifi events. You may have some other error in the code causing a reboot. There's often a log message indicating why the reboot is occurring.