WEP/WPA-PSK on old router and STA to AP switch

[maxdd]

Basic Infos

Hardware

Hardware: Amica NodeMCU ESP8266

Description

Switching from AP to STA and directly connecting to STA is not working if the router is in WPA-PSK/WEP?
Dots everywhere.
Basic explanation of the code:

1. The ESP8266 check if there is a known connection <--if auth is passed immediately at the beginning it still keeps showing dots
2. If there isn't, starts an AP mode and open a UDP sockect
3. It waits for SSID and PW to be populated
4. After population it tries to connect to the given network <-- auth is correct but it keeps showing dots

A wifi scan from the module and a compare with SSID retrieved from UDP returns true, hence the SSID is correctly found. I'm trying both with WEP and WPA-PSK

Settings in IDE

Module: NodeMCU ESP8266 Module
CPU Frequency: 80Mhz

Sketch

#include <ESP8266WiFi.h>
#include <WiFiUdp.h>

WiFiUDP UDPTestServer;
unsigned int UDPPort = 1337;

byte packetBuffer[256];
String SSID = "";
String PW = "";
String TOKEN = "asdasd";

bool sent = false;
bool initStatus = true;

void setup() {

  Serial.begin(115200);
  delay(1000);
  Serial.printf("\nTry connecting to WiFi with SSID '%s'\n", WiFi.SSID().c_str());

  WiFi.mode(WIFI_STA);
  WiFi.begin(WiFi.SSID().c_str(), WiFi.psk().c_str()); // reading data from EPROM, last saved credentials

  /* Sometimes it doesn't connect and it keeps . . . . . . . . . . . . indefinitely
    if (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }*/

  if (WiFi.status() == WL_CONNECTED) {
    Serial.printf("Connected successfully to SSID '%s'\n", WiFi.SSID().c_str());
  } else {
    WifiAuthAndTokenExchange();
  }

  UDPTestServer.begin(UDPPort);
}

bool WifiAuthAndTokenExchange() {

  Serial.printf("\nCannot connect, starting AP mode\n");
  WiFi.disconnect();
  WiFi.mode(WIFI_AP);
  boolean result = WiFi.softAP("Test", "Test");

  UDPTestServer.begin(UDPPort);
  Serial.printf("UDP Server started\n");

  //wait for UDP to populate SSID and PW
  while (SSID.length() <= 0 || PW.length() <= 0 || TOKEN.length() <= 0) {
    //    Serial.printf("Waiting for Auth..\n");
    handleUDPServer();
    //    Serial.printf("SSID '%s', PW '%s', TOKEN '%s'", SSID.c_str(), PW.c_str(), TOKEN.c_str());
    delay(10);
  }

  Serial.printf("Auth received\n");
  
  UDPTestServer.stop();
  Serial.printf("UDP Server stopped\n");

  WiFi.mode(WIFI_STA);
  WiFi.begin(SSID.c_str(), PW.c_str());
  Serial.printf("Try connecting to WiFi with SSID '%s'\n", SSID.c_str());

  WiFi.printDiag(Serial);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
}

void loop() {

  if (WiFi.status() != WL_CONNECTED) {
    //reset micro
  }

  handleUDPServer();

  if (!sent && !initStatus) {
    sendNotificationToDevice();
    Serial.println("Sent");
    sent = true;
  }
}

void sendNotificationToDevice() {
//....
  
}

[devyte]

This issue is old. A lot has changed since it was reported, including fixes that are relevant.
Closing.
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