GPIO relè on Sender implementation

LoRaSender/LoRaSender.ino

@@ -69,6 +69,9 @@ void setup(void)
 
   //-------------------------------------
 
+  pinMode(17, OUTPUT);
+  digitalWrite(17, LOW);    // set GPIO17 low
+  
   //Initialize serial and wait for port to open:
   Serial.begin(115200);
   
@@ -141,12 +144,24 @@ void drawTextOLED(String text, String ttext, String rread, String signalLevel) {
 
 String s;
 unsigned long previousMillis = 0;
+unsigned long previousMillisGPIO = 0;
 const long interval = 10000;
 
+//reqInt == variabile globale per sapere qual'è l'ultimo pin GPIO settato
+int reqInt = 17; // just for first run
+
 void loop(void)
 {
+  unsigned long currentMillis = millis();
+  
   drawTextOLED(lastCommand, ipAddr, lastReceived, signalLevel);
-
+  
+  if(previousMillisGPIO < currentMillis)
+  {
+    //reqInt == variabile globale per sapere qual'è l'ultimo pin GPIO settato
+    digitalWrite(reqInt, LOW);    // set GPIO17 low
+  }
+  
   // Check if a client has connected
   WiFiClient client = server.available();
   if (!client) {
@@ -172,7 +187,7 @@ void loop(void)
   
   client.flush();
 
-  unsigned long currentMillis = millis();
+  currentMillis = millis();
 
   if (req == "/")
   {
@@ -212,6 +227,15 @@ void loop(void)
       s += lastCommand;
       s += "";
     }
+  } else if (req.indexOf('/gpio') > 0) {
+    //OK send s to browser
+    
+    pinGPIO(req);
+    s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n";
+    s += req;
+    s += "";
+    
+    previousMillisGPIO = currentMillis + 2000;
   } else {
     s = "HTTP/1.1 404 Not Found\r\n\r\n";
 //    Serial.println("Sending 404");
@@ -289,6 +313,15 @@ void pinRequestRead(String req)
   LoRa.receive();
 }
 
+void pinGPIO(String req)
+{
+  req = req.substring(req.lastIndexOf('/') + 1);
+  reqInt = req.toInt();
+
+  lastCommand = "gpio : " + String(reqInt);
+
+  digitalWrite(reqInt, HIGH);    // set GPIO17 high
+}
 //----------------------------------------------------------------------------------------------
 //---------------------------------------- ENCRIPTION ------------------------------------------
 //----------------------------------------------------------------------------------------------