Dynamic ledPin switching

esp8266_deauther/Attack.cpp

@@ -461,11 +461,11 @@ void Attack::refreshLed() {
   }
   if (numberRunning >= 1 && settings.useLed) {
     if (debug) Serial.println("Attack LED : ON");
-    digitalWrite(settings.ledPin, LOW);
+    digitalWrite(settings.ledPin, !settings.pinStateOff);
   }
   else if (numberRunning == 0 || !settings.useLed) {
     if (debug) Serial.println("Attack LED : OFF");
-    digitalWrite(settings.ledPin, HIGH);
+    digitalWrite(settings.ledPin, settings.pinStateOff);
   }
 }
 

esp8266_deauther/Attack.h

@@ -18,6 +18,8 @@ extern "C" {
 
 #define attacksNum 3
 #define macListLen 64
+#define PIN_STATE_OFF false
+#define PIN_STATE_ON true
 
 extern void PrintHex8(uint8_t *data, uint8_t length);
 extern void getRandomVendorMac(uint8_t *buf);

esp8266_deauther/Settings.cpp

@@ -26,6 +26,21 @@ void Settings::syncMacInterface(){
   }
 }
 
+void Settings::setLedPin(int newLedPin){
+  prevLedPin = ledPin;
+  if(newLedPin > 0 && newLedPin != prevLedPin){
+    ledPin = newLedPin;
+    pinMode(ledPin, OUTPUT);
+    if(!prevLedPin == 0){
+      digitalWrite(ledPin, digitalRead(prevLedPin));
+      digitalWrite(prevLedPin, pinStateOff);
+      pinMode(prevLedPin, INPUT);
+    }else{
+      digitalWrite(ledPin, pinStateOff);
+    }
+  }
+}
+
 void Settings::load() {
 
   if (EEPROM.read(checkNumAdr) != checkNum) {
@@ -72,7 +87,7 @@ void Settings::load() {
   multiAttacks = (bool)EEPROM.read(multiAttacksAdr);
   macInterval = eepromReadInt(macIntervalAdr);
   beaconInterval = (bool)EEPROM.read(beaconIntervalAdr);
-  ledPin = (int)EEPROM.read(ledPinAdr);
+  setLedPin((int)EEPROM.read(ledPinAdr));
   isSettingsLoaded = 1;
 }
 

esp8266_deauther/Settings.h

@@ -56,7 +56,6 @@ class Settings
     void save();
     void send();
     void info();
-    void syncMacInterface();
 
     int ssidLen;
     String ssid = "";
@@ -76,11 +75,15 @@ class Settings
     bool multiAttacks;
     int macInterval;
     bool beaconInterval;
-    int ledPin;
+    int ledPin = 0;
+    int prevLedPin = 0;
     Mac defaultMacAP;
     Mac macAP;
     bool isMacAPRand;
     bool isSettingsLoaded = 0;
+    void syncMacInterface();
+    void setLedPin(int newLedPin);
+    bool pinStateOff = true;  // When attack is off, pin state is HIGH
     
   private:
     size_t getSize();

esp8266_deauther/esp8266_deauther.ino

@@ -445,7 +445,7 @@ void saveSettings() {
     else settings.multiAttacks = true;
   }
   
-  if (server.hasArg("ledPin")) settings.ledPin = server.arg("ledPin").toInt();
+  if (server.hasArg("ledPin")) settings.setLedPin(server.arg("ledPin").toInt());
   if(server.hasArg("macInterval")) settings.macInterval = server.arg("macInterval").toInt();
 
   settings.save();
@@ -479,6 +479,8 @@ void setup() {
   nameList.load();
   ssidList.load();
 
+  attack.refreshLed();
+
   delay(500); // Prevent bssid leak
 
   startWifi();
@@ -568,9 +570,6 @@ void setup() {
   if(digitalRead(resetPin) == LOW) settings.reset();
 #endif
 
-  pinMode(settings.ledPin, OUTPUT);
-  digitalWrite(settings.ledPin, HIGH);
-
   if(debug){
     Serial.println("\nStarting...\n");
 #ifndef USE_DISPLAY

web_server/html/settings.html

@@ -137,7 +137,7 @@
 			</div>
 			<div class="row">
 				<div class="col-6">
-					<label for="ledPin">LED Pin (restart needed)</label>
+					<label for="ledPin">LED Pin</label>
 				</div>
 				<div class="col-6">
 					<input type="number" id="ledPin" min="0" max="18">