#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClient.h>

#include <ESP8266WiFiMulti.h>
ESP8266WiFiMulti WiFiMulti;


// WiFi parameters
const char* ssid = "ESP8266 Wifi Test";
const char* password = "1234Test";

const char* serverNameBoard = "http://192.168.4.2/board";
const char* serverNameRSSI = "http://192.168.4.2/rssi";
String Board;
String rssi;

unsigned long previousMillis = 0;
const long interval = 5000; 


void setup() {
  
  Serial.begin(115200);
  
  WiFi.mode(WIFI_STA); // Setting as a Station
  
  WiFi.begin(ssid, password); // Connecting to specified WiFi network

  // Coomunicate with user through Serial port to notify of connection status
  
  Serial.print("Connecting");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println(" ");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());

  

}

// Function that handles requests to the server - Copied from https://randomnerdtutorials.com/esp8266-nodemcu-client-server-wi-fi/

String httpGETRequest(const char* serverName) {
  WiFiClient client;
  HTTPClient http;
    
  // Your IP address with path or Domain name with URL path 
  http.begin(client, serverName);
  
  // Send HTTP POST request
  int httpResponseCode = http.GET();
  
  String payload = "--"; 
  
  if (httpResponseCode>0) {
    Serial.print("HTTP Response code: ");
    Serial.println(httpResponseCode);
    payload = http.getString();
  }
  else {
    Serial.print("Error code: ");
    Serial.println(httpResponseCode);
  }
  // Free resources
  http.end();

  return payload;
}



void loop(){
  
  if(millis() - previousMillis >= interval) {
     // Check WiFi connection status
    if ((WiFiMulti.run() == WL_CONNECTED)) {
      Board = String(httpGETRequest(serverNameBoard));;
      rssi = String(httpGETRequest(serverNameRSSI));;
      Serial.println("Board: " + Board + " | Signal Strength: " + rssi + "db");
      previousMillis = millis();
    }
  } 
}