ESP32 Forum

Posted: **Tue Apr 27, 2021 8:30 am**

Board: ESP32-EVB(WROOM-32U)

Core Installation version:

platformio/contrib-piohome           3.3.4 @ ~3.3.4 
platformio/tool-scons                4.40100.2 @ ~4.40100.2

Platform Manager
================
Platform espressif32
--------
platformio/espressif32               3.2.0 
platformio/toolchain-xtensa32        2.50200.97 @ ~2.50200.0   
platformio/framework-arduinoespressif32 3.10006.210326 @ ~3.10006.0 
 platformio/tool-esptoolpy            1.30000.201119 @ ~1.30000.0 
platformio/tool-mkspiffs             2.230.0 @ ~2.230.0  
IDE name: PlatformIO 5.1.1 on VSC v1.55
Flash Frequency: 80000000L
PSRAM enabled: no
Computer OS: Linux Mint

Description:
Can't find ESP32 on the Wireless device list using phone or PC.
It happened suddenly while I was testing some code.
There are no error messages. The ESP32 isn't visible anymore.
I've tried:

resetting by pressing the RST button;

plugging and unplugging the USB cord;

uploading the code again.

I also have to mention that I have other ESP32 and they work just fine with the same code and in the same environment.

Code: Select all

#include <Arduino.h>

void startAP()
{

  if (SPIFFS.exists("/network.txt"))
    SPIFFS.remove("/network.txt");

  String x = "ESP-";
  x.concat(random(100, 999));
  char ssidAP[x.length() + 1];
  x.toCharArray(ssidAP, sizeof(ssidAP));

  logOutput("Starting AP ... ");
  logOutput(WiFi.softAP(ssidAP, passwordAP) ? (String)ssidAP + " ready" : "WiFi.softAP failed ! (Password must be at least 8 characters long )");
  delay(500);
  logOutput("Setting AP configuration ... ");
  logOutput(WiFi.softAPConfig(local_IP_AP, gatewayAP, subnetAP) ? "Ready" : "Failed!");
  delay(500);
  logOutput("Soft-AP IP address: ");
  logOutput(WiFi.softAPIP().toString());
}

void setup()
{
  if(go_into_station)
  {
     // STA_MODE code
  }
  else
  {
    Serial.println(WiFi.mode(WIFI_AP) ? "Controller went in AP Mode !" : "Controller couldn't go in AP_MODE. AP_STA_MODE 
    will start.");
    startAP();
  }
}

void loop() {
delay(2)
}

Debug Messages:

Code: Select all

[D][WiFiGeneric.cpp:374] _eventCallback(): Event: 0 - WIFI_READY
Controller went in AP Mode !
[D][WiFiGeneric.cpp:374] _eventCallback(): Event: 14 - AP_START
Starting AP ... 
ESP-472 ready
[D][WiFiGeneric.cpp:374] _eventCallback(): Event: 14 - AP_START
[D][WiFiGeneric.cpp:374] _eventCallback(): Event: 14 - AP_START
Setting AP configuration ... 
Ready
Soft-AP IP address: 
109.108.112.114

ESP32 Forum

ESP32 is not listed in the WiFi List. Can't find it while in AP Mode anymore

ESP32 is not listed in the WiFi List. Can't find it while in AP Mode anymore