Fixed it so it only pulls the ip once

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

@@ -21,9 +21,9 @@ void Connectivity::connectWiFi(char* ssid, char* pass){
 // }
 
 const char* getServerURL = "http://145.92.8.132:443/get-ip";
-String ipAddress = "";
+char* ipAddress = "";
 
-String Connectivity::fetchIPAddress() {
+const char* Connectivity::fetchIPAddress() {
   if (WiFi.status() == WL_CONNECTED) {
     HTTPClient http;
     WiFiClient client;
@@ -32,7 +32,7 @@ String Connectivity::fetchIPAddress() {
     int httpCode = http.GET();
     if (httpCode > 0) {
       if (httpCode == HTTP_CODE_OK) {
-        ipAddress = http.getString();
+        ipAddress = strdup(http.getString().c_str());
       }
     } else {
       Serial.printf("GET request failed, error: %s\n", http.errorToString(httpCode).c_str());

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

@@ -19,7 +19,7 @@ public:
   void websocketSetup(char* ip, uint16_t port, char* adress);
   void sendData(float roll, float pitch, float yaw);
   int httpPost(const char *serverAddress, const char *serverSubPath, const unsigned short serverPort, const char *data, const size_t dataLength, const char *contentType);
-  String fetchIPAddress();
+  const char* fetchIPAddress();
 
 private:
   ESP8266WiFiMulti wifi;

code/arduino/Movement-sensor-code/Movement-sensor-code.ino

@@ -7,8 +7,6 @@ void setup() {
   Serial.begin(9600);
 }
 
-unsigned long lastTime = 0;  // will store the last time the code was run
-
 void loop() {
   SensorManager::eulerAngles eulerRotation = sensorManager.getEulerAngles();
   // SensorManager::acceleration rotationAcceleration = sensorManager.getAcelleration();
@@ -19,6 +17,11 @@ struct acceleration {
   float z = 9;
 } accelData;
 
+  if (!ipAquired) {
+    serverIp = connectivity.fetchIPAddress();
+    ipAquired = true;
+  }
+  unsigned long lastTime = 0;  // will store the last time the code was run
   unsigned long currentTime = millis();
   if (currentTime - lastTime >= 100) {  // 100 ms has passed
     memset(buffer, 0, BUFFER_SIZE);
@@ -34,10 +37,10 @@ struct acceleration {
         accelData.z,
         "data");
         // %d = int, %f = floatation, %s = string
-    connectivity.httpPost(connectivity.fetchIPAddress(), "/", 3445, buffer, strlen(buffer), "application/json");
+    connectivity.httpPost(serverIp, "/", 3445, buffer, strlen(buffer), "application/json");
     lastTime = currentTime;
   }
 }
 //acceleration.X
 //acceleration.Y
-//acceleration.Z
+//acceleration.Z

code/arduino/Movement-sensor-code/headerFIle.h

@@ -15,3 +15,5 @@ WebSocketsClient webSocket;
 #define IP_ADDRESS "192.168.137.12"
 
 char *buffer = (char *)malloc(sizeof(char) * BUFFER_SIZE);
+const char* serverIp = NULL; // Declare serverIp here
+bool ipAquired = false;