ConfigOnDRD_ESP8266_minimal.ino

/****************************************************************************************************************************
  Async_ConfigOnDoubleReset_minimal.ino
  For ESP8266 / ESP32 boards
  Built by Khoi Hoang https://github.com/khoih-prog/ESP_WiFiManager
  Licensed under MIT license
 *****************************************************************************************************************************/
#if defined(ESP8266)
  #define USE_LITTLEFS            true
  #define ESP_DRD_USE_LITTLEFS    true
#else  
  #error This code is intended to run on the ESP8266 platform! Please check your Tools->Board setting.  
#endif
#include <ESP_WiFiManager.h>                    //https://github.com/khoih-prog/ESP_WiFiManager
#define DRD_TIMEOUT             10
#define DRD_ADDRESS             0
#include <ESP_DoubleResetDetector.h>            //https://github.com/khoih-prog/ESP_DoubleResetDetector
DoubleResetDetector* drd;
const int PIN_LED       = 2;
bool      initialConfig = false;

void setup() {
  pinMode(PIN_LED, OUTPUT);
  Serial.begin(115200); while (!Serial); delay(200);
  Serial.print(F("\nStarting ConfigOnDoubleReset_minimal on ")); Serial.println(ARDUINO_BOARD);
  Serial.println(ESP_WIFIMANAGER_VERSION); 
  if (WiFi.SSID() == "") { Serial.println(F("No AP credentials")); initialConfig = true; }
  drd = new DoubleResetDetector(DRD_TIMEOUT, DRD_ADDRESS);
  if (drd->detectDoubleReset()) { Serial.println(F("DRD")); initialConfig = true; }
  if (initialConfig) {
    Serial.println(F("Starting Config Portal")); digitalWrite(PIN_LED, LOW);
    ESP_WiFiManager ESP_wifiManager("ConfigOnDoubleReset");
    ESP_wifiManager.setConfigPortalTimeout(0);
    if (!ESP_wifiManager.startConfigPortal()) { Serial.println(F("Not connected to WiFi")); }
    else { Serial.println(F("connected")); }
  }
  digitalWrite(PIN_LED, HIGH); Serial.print(F("After waiting ")); //WiFi.mode(WIFI_STA);
  unsigned long startedAt = millis();
  int connRes = WiFi.waitForConnectResult();
  float waited = (millis() - startedAt);
  Serial.print(waited / 1000); Serial.print(F(" secs , Connection result is ")); Serial.println(connRes);
  if (WiFi.status() != WL_CONNECTED) { Serial.println(F("Failed to connect")); }
  else { Serial.print(F("Local IP: ")); Serial.println(WiFi.localIP()); }
}
void loop() { drd->loop(); }