node


#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#include <SoftwareSerial.h>
SoftwareSerial s(D6,D5);
#include <ArduinoJson.h>

#ifndef STASSID
#define STASSID "OpenWrt"
#define STAPSK  "asdfghjkl"
#endif

const char *ssid = STASSID;
const char *password = STAPSK;

ESP8266WebServer server(80);

float pf, power;

void handleRoot() {
  char temp[400];


  snprintf(temp, 400,

           "<html>\
  <head>\
    <meta http-equiv='refresh' content='5'/>\
    <title>Power Factor Management Project</title>\
    <style>\
      body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }\
    </style>\
  </head>\
  <body>\
    <h1>Power Management</h1>\
    <p>Power Factor: %02f </p>\
    <p>Power Consumed: %02f</p>\
  </body>\
</html>",

           pf, power
          );
  server.send(200, "text/html", temp);
}

void handleNotFound() {

  String message = "File Not Found\n\n";
  message += "URI: ";
  message += server.uri();
  message += "\nMethod: ";
  message += (server.method() == HTTP_GET) ? "GET" : "POST";
  message += "\nArguments: ";
  message += server.args();
  message += "\n";

  for (uint8_t i = 0; i < server.args(); i++) {
    message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
  }

  server.send(404, "text/plain", message);

}

void setup(void) {
//  pinMode(led, OUTPUT);
//  digitalWrite(led, 0);
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.println("");
  s.begin(115200);
  Serial.println("waiting...");
  while (!Serial) continue;

  // Wait for connection
  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());

  if (MDNS.begin("esp8266")) {
    Serial.println("MDNS responder started");
  }

  server.on("/", handleRoot);

  server.on("/inline", []() {
    server.send(200, "text/plain", "this works as well");
  });
  server.onNotFound(handleNotFound);
  server.begin();
  Serial.println("HTTP server started");
}

void loop(void) {


  StaticJsonBuffer<1000> jsonBuffer;
  JsonObject& root = jsonBuffer.parseObject(s);

  if (root == JsonObject::invalid())
  {
    Serial.println("Invalid data");
//    return;
  }
  //Print the data in the serial monitor
  else {
    Serial.println("JSON received and parsed");
    root.prettyPrintTo(Serial);
    pf = root["pf"];
    power = root["power"];
    server.handleClient();
  }
   MDNS.update();
}