added comments

code/arduino/Movement-sensor-code/Connectivity.cpp

@@ -21,7 +21,7 @@ void Connectivity::connectWiFi(char* ssid, char* pass){
 // }
 
 const char* getServerURL = "http://145.92.8.132:443/get-ip";
-String ipAddress = "";
+String ipAddress = ""; // string that will hold the server's IP address
 
 String Connectivity::fetchIPAddress() {
   if (WiFi.status() == WL_CONNECTED) {
@@ -32,6 +32,7 @@ String Connectivity::fetchIPAddress() {
     int httpCode = http.GET();
     if (httpCode > 0) {
       if (httpCode == HTTP_CODE_OK) {
+        // If successful (code 200), read the response body and store the IP address
         ipAddress = http.getString();
       }
     } else {