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sanketwadekarpedrominatel
sanketwadekar
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pedrominatel
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Fixed issue where esp32 won't reconnect to WiFi AP if the AP was restarted. (#7512)
* Fixed issue where esp32 won't reconnect to WiFi AP if the AP was restarted * Added the autoReconnect condition and removed the reconnect reason * Chenges on the WiFi reconnection and added new example * Added new line at the end * Changes reverted with some minor changes. New example remained * Changes reverted and sync Co-authored-by: pedro.minatel <[email protected]>
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Diff for: ‎libraries/WiFi/examples/WiFiClientConnect/README.md

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# WiFiClientConnect Example
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This example demonstrates how to connect to the WiFi and manage the status and disconnection from STA.
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# Supported Targets
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Currently, this example supports the following targets.
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| Supported Targets | ESP32 | ESP32-S2 | ESP32-C3 |
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| ----------------- | ----- | -------- | -------- |
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## How to Use Example
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* How to install the Arduino IDE: [Install Arduino IDE](https://github.com/espressif/arduino-esp32/tree/master/docs/arduino-ide).
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#### Using Arduino IDE
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* Before Compile/Verify, select the correct board: `Tools -> Board`.
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* Select the COM port: `Tools -> Port: xxx` where the `xxx` is the detected COM port.
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#### Using Platform IO
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* Select the COM port: `Devices` or set the `upload_port`` option on the `platformio.ini` file.
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## Example/Log Output
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```
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[WiFi] Connecting to MyWiFiNetwork
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[ 66][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 0 - WIFI_READY
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[ 150][V][WiFiGeneric.cpp:338] _arduino_event_cb(): STA Started
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[ 151][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
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[ 151][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 2 - STA_START
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[WiFi] WiFi is disconnected
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[ 234][V][WiFiGeneric.cpp:353] _arduino_event_cb(): STA Connected: SSID: MyWiFiNetwork, BSSID: xx:xx:xx:xx:xx:xx, Channel: 8, Auth: WPA2_PSK
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[ 235][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 4 - STA_CONNECTED
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[ 560][V][WiFiGeneric.cpp:367] _arduino_event_cb(): STA Got New IP:192.168.68.114
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[ 561][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 7 - STA_GOT_IP
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[ 564][D][WiFiGeneric.cpp:1004] _eventCallback(): STA IP: 192.168.68.114, MASK: 255.255.255.0, GW: 192.168.68.1
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[WiFi] WiFi is connected!
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[WiFi] IP address: 192.168.68.114
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[WiFi] Disconnecting from WiFi!
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[ 2633][V][WiFiGeneric.cpp:360] _arduino_event_cb(): STA Disconnected: SSID: MyWiFiNetwork, BSSID: xx:xx:xx:xx:xx:xx, Reason: 8
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[ 2634][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
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[ 2635][V][WiFiGeneric.cpp:341] _arduino_event_cb(): STA Stopped
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[ 2641][W][WiFiGeneric.cpp:953] _eventCallback(): Reason: 8 - ASSOC_LEAVE
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[ 2654][D][WiFiGeneric.cpp:975] _eventCallback(): WiFi the station is disconnected
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[ 2661][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 3 - STA_STOP
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[WiFi] Disconnected from WiFi!
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...
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```
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## Troubleshooting
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***Important: Be sure you're using a good quality USB cable that has enough power for your project.***
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* **Programming Fail:** If the programming/flash procedure fails, try to reduce the serial connection speed.
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* **COM port not detected:** Check the USB cable connection and the USB to Serial driver installation.
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If the error persists, you can ask for help at the official [ESP32 forum](https://esp32.com) or see [Contribute](#contribute).
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## Contribute
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To know how to contribute to this project, see [How to contribute.](https://github.com/espressif/arduino-esp32/blob/master/CONTRIBUTING.rst)
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If you have any **feedback** or **issue** to report on this example/library, please open an issue or fix it by creating a new PR. Contributions are more than welcome!
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Before creating a new issue, be sure to try Troubleshooting and check if the same issue was already created by someone else.
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## Resources
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* Arduino-ESP32 Official Repository: [espressif/arduino-esp32](https://github.com/espressif/arduino-esp32)
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* ESP32 Datasheet: [Link to datasheet](https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf)
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* ESP32-S2 Datasheet: [Link to datasheet](https://www.espressif.com/sites/default/files/documentation/esp32-s2_datasheet_en.pdf)
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* ESP32-C3 Datasheet: [Link to datasheet](https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf)
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* Official ESP-IDF documentation: [ESP-IDF](https://idf.espressif.com)

Diff for: ‎libraries/WiFi/examples/WiFiClientConnect/WiFiClientConnect.ino

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/* Wi-Fi STA Connect and Disconnect Example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <WiFi.h>
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const char* ssid = "your-ssid";
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const char* password = "your-password";
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int btnGPIO = 0;
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int btnState = false;
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void setup()
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{
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Serial.begin(115200);
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delay(10);
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// Set GPIO0 Boot button as input
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pinMode(btnGPIO, INPUT);
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// We start by connecting to a WiFi network
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// To debug, please enable Core Debug Level to Verbose
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Serial.println();
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Serial.print("[WiFi] Connecting to ");
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Serial.println(ssid);
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WiFi.begin(ssid, password);
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// Auto reconnect is set true as default
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// To set auto connect off, use the following function
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// WiFi.setAutoReconnect(false);
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// Will try for about 10 seconds (20x 500ms)
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int tryDelay = 500;
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int numberOfTries = 20;
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// Wait for the WiFi event
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while (true) {
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switch(WiFi.status()) {
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case WL_NO_SSID_AVAIL:
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Serial.println("[WiFi] SSID not found");
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break;
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case WL_CONNECT_FAILED:
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Serial.print("[WiFi] Failed - WiFi not connected! Reason: ");
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return;
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break;
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case WL_CONNECTION_LOST:
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Serial.println("[WiFi] Connection was lost");
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break;
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case WL_SCAN_COMPLETED:
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Serial.println("[WiFi] Scan is completed");
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break;
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case WL_DISCONNECTED:
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Serial.println("[WiFi] WiFi is disconnected");
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break;
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case WL_CONNECTED:
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Serial.println("[WiFi] WiFi is connected!");
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Serial.print("[WiFi] IP address: ");
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Serial.println(WiFi.localIP());
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return;
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break;
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default:
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Serial.print("[WiFi] WiFi Status: ");
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Serial.println(WiFi.status());
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break;
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}
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delay(tryDelay);
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if(numberOfTries <= 0){
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Serial.print("[WiFi] Failed to connect to WiFi!");
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// Use disconnect function to force stop trying to connect
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WiFi.disconnect();
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return;
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} else {
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numberOfTries--;
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}
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}
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}
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void loop()
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{
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// Read the button state
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btnState = digitalRead(btnGPIO);
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if (btnState == LOW) {
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// Disconnect from WiFi
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Serial.println("[WiFi] Disconnecting from WiFi!");
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// This function will disconnect and turn off the WiFi (NVS WiFi data is kept)
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if(WiFi.disconnect(true, false)){
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Serial.println("[WiFi] Disconnected from WiFi!");
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}
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delay(1000);
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}
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}

Diff for: ‎libraries/WiFi/src/WiFiGeneric.cpp

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bool WiFiGenericClass::_isReconnectableReason(uint8_t reason) {
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switch(reason) {
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case WIFI_REASON_UNSPECIFIED:
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//Timeouts (retry)
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case WIFI_REASON_AUTH_EXPIRE:
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case WIFI_REASON_4WAY_HANDSHAKE_TIMEOUT:

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