ESP32 - Solving the problem of WiFiManager "failed to connect"

This post is a quick summary on how to solve the always "failed to connect" issue when using WiFiManager on ESP32.

The Symptom

The password is saved but the Connection Result always returns 1 (Failed to connect).

*WM: WiFi save
*WM: Sent wifi save page
*WM: Connecting to new AP
*WM: Connecting as wifi client...
*WM: Connection result:
*WM: 1
*WM: Failed to connect.

If you reset manually the board the connection will established, so the password is correctly stored.
I tried with old Arduino core version and all functionality work correctly, so should be a problem whit some modification on new commit (is there also some IDF sdk update)

ESP8266 WiFiManager - Configuring the parameters of the sketch running on ESP8266

This post is about how to use WiFiManager to configure other parameters of the sketch running on ESP8266. By using this approach, there is no need to re-compile the sketch for configuration changes.

ESP8266 - WiFi Manager

This is a brief summary of my experience working with WiFi Manager developed by tzapu for ESP8266. A big thank you to tzapu for this amazing work. The original version of the code can be found at https://github.com/tzapu/WiFiManager/blob/master/examples/AutoConnect/AutoConnect.ino

The instruction for getting WiFiManager ready for Arduino IDE can be found at https://github.com/tzapu/WiFiManager.