Cannot connect to WiFi on ESP32-S3-DevKitC-1

[sayanee]

Board

ESP32-S3-DevKitC-1

Device Description

Just the dev board ESP32-S3-DevKitC-1 and nothing else.

Hardware Configuration

No

Version

v2.0.5

IDE Name

Arduino IDE

Operating System

macOS 12.6.1

Flash frequency

80MHz

PSRAM enabled

no

Upload speed

921600

Description

Cannot connect to WiFi SSID

Sketch

#include <WiFi.h>

char ssid[] = "WIFI_SSID";
char pass[] = "WIFI_PASSWORD";

void setup() {
  Serial.begin(115200);
  while (!Serial) { }

  Serial.print("Attempting to connect to SSID: ");
  Serial.println(ssid);

  WiFi.useStaticBuffers(true);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("Connected to WiFi");
  printWifiStatus();
}

void loop() {}

void printWifiStatus() {
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);

  long rssi = WiFi.RSSI();
  Serial.print("signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");
}

Debug Message

Attempting to connect to SSID: WIFI_SSID_NAME
[  4216][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 0 - WIFI_READY
[  4249][V][WiFiGeneric.cpp:338] _arduino_event_cb(): STA Started
[  4251][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 2 - STA_START
[  4250][V][WiFiGeneric.cpp:97] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
....[  6674][V][WiFiGeneric.cpp:360] _arduino_event_cb(): STA Disconnected: SSID: WIFI_SSID_NAME, BSSID: 00:00:00:00:00:00, Reason: 201
[  6674][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
[  6682][W][WiFiGeneric.cpp:950] _eventCallback(): Reason: 201 - NO_AP_FOUND
[  6689][D][WiFiGeneric.cpp:966] _eventCallback(): WiFi Reconnect Running
[  6697][V][WiFiGeneric.cpp:97] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
.....[  9114][V][WiFiGeneric.cpp:360] _arduino_event_cb(): STA Disconnected: SSID: WIFI_SSID_NAME, BSSID: 00:00:00:00:00:00, Reason: 201
[  9114][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
[  9122][W][WiFiGeneric.cpp:950] _eventCallback(): Reason: 201 - NO_AP_FOUND
[  9129][D][WiFiGeneric.cpp:975] _eventCallback(): WiFi AutoReconnect Running
[  9137][V][WiFiGeneric.cpp:97] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
.....[ 11557][V][WiFiGeneric.cpp:360] _arduino_event_cb(): STA Disconnected: SSID: WIFI_SSID_NAME, BSSID: 00:00:00:00:00:00, Reason: 201
[ 11557][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
[ 11565][W][WiFiGeneric.cpp:950] _eventCallback(): Reason: 201 - NO_AP_FOUND

Other Steps to Reproduce

I have successfully connected to the same WiFi network with Tasmota as suggested in #6430 (although it's for ESP32-C3). WiFiScan example code is also successful and it shows all the WiFi networks nearby!

I have also added WiFi.useStaticBuffers(true); and WiFi.mode(WIFI_STA); before WiFi.begin(ssid, pass); as suggested in the issue #6430.

WiFi SSID details:

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[me-no-dev]

Can you please enable Debug to Info or Verbose and try again. Should print more info on what is the WiFi doing.

[sayanee]

Apologies, I completely missed the Arduino IDE Tools menu on Core Debug Level. I have also updated the original post.

Here's the output on the serial monitor in VERBOSE mode:

Attempting to connect to SSID: WIFI_SSID_NAME
[  4216][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 0 - WIFI_READY
[  4249][V][WiFiGeneric.cpp:338] _arduino_event_cb(): STA Started
[  4251][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 2 - STA_START
[  4250][V][WiFiGeneric.cpp:97] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
....[  6674][V][WiFiGeneric.cpp:360] _arduino_event_cb(): STA Disconnected: SSID: WIFI_SSID_NAME, BSSID: 00:00:00:00:00:00, Reason: 201
[  6674][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
[  6682][W][WiFiGeneric.cpp:950] _eventCallback(): Reason: 201 - NO_AP_FOUND
[  6689][D][WiFiGeneric.cpp:966] _eventCallback(): WiFi Reconnect Running
[  6697][V][WiFiGeneric.cpp:97] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
.....[  9114][V][WiFiGeneric.cpp:360] _arduino_event_cb(): STA Disconnected: SSID: WIFI_SSID_NAME, BSSID: 00:00:00:00:00:00, Reason: 201
[  9114][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
[  9122][W][WiFiGeneric.cpp:950] _eventCallback(): Reason: 201 - NO_AP_FOUND
[  9129][D][WiFiGeneric.cpp:975] _eventCallback(): WiFi AutoReconnect Running
[  9137][V][WiFiGeneric.cpp:97] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
.....[ 11557][V][WiFiGeneric.cpp:360] _arduino_event_cb(): STA Disconnected: SSID: WIFI_SSID_NAME, BSSID: 00:00:00:00:00:00, Reason: 201
[ 11557][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
[ 11565][W][WiFiGeneric.cpp:950] _eventCallback(): Reason: 201 - NO_AP_FOUND

Since the debug message says "NO_AP_FOUND", I have tried to reconnect my computer / macbook with the password again and it is fine.

As a note, I am not sure whether having a special character of . in my SSID name is also creating this problem of not being able to find the SSID.

[me-no-dev]

Error says that it was not able to find the AP. Maybe that AP is only 5GHz? Or SSID is wrong? And yeah, maybe it could be the ., though if it's valid char, it should work.

[me-no-dev]

Nevermind, I see up in the initial post that it is indeed 2.4GHz. Try with SSID without the dot

[sayanee]

Thanks, @me-no-dev!

I tried with temporary hotspots with my iPhone and it seems the password is the issue, not the SSID name with the . dot.
Both the password are alphanumeric with less than 30 characters 🤷🏻‍♀️

SSID has .	Same password	Connect?
Yes	Yes	No
Yes	No	Yes
No	Yes	No
No	No	Yes

Connected to WiFi
SSID: WIFI_SSID
IP Address: 172.20.10.3
signal strength (RSSI):-37 dBm

I have no idea how to reproduce this bug, but I got it working and connected to WiFi.

So I will close this issue, I guess.