UNO

#include <SoftwareSerial.h>

#include <ArduinoJson.h>

​

#define RX 10

#define TX 11

String WIFI_SSID = "your-wifi-ssid";       // Your WiFi ssid

String PASSWORD = "your-wifi-password";         // Password

String DEVICE_SECRET_KEY  = "your-device-secret-key";

​

String HOST = "api.wia.io";

String PATH = "/v1/events";

String PORT = "80";

​

int countTrueCommand;

int countTimeCommand;

boolean found = false;

​

SoftwareSerial esp8266(RX, TX);

​

StaticJsonBuffer<200> jsonBuffer;

JsonObject& root = jsonBuffer.createObject();

​

void setup() {

  Serial.begin(9600);

  esp8266.begin(115200);

  esp8266.println("AT");

  Serial.println(esp8266.read());

  sendCommandToESP8266("AT", 5, "OK");

  sendCommandToESP8266("AT+CWMODE=1", 5, "OK");

  sendCommandToESP8266("AT+CWJAP=\"" + WIFI_SSID + "\",\"" + PASSWORD + "\"", 20, "OK");

}

​

void loop() {

  root["name"] = "temperature";

  root["data"] =  21.5;

  String data;

  root.printTo(data);

​

  String postRequest = "POST " + PATH  + " HTTP/1.1\r\n" +

                       "Host: " + HOST + "\r\n" +

                       "Accept: *" + "/" + "*\r\n" +

                       "Content-Length: " + data.length() + "\r\n" +

                       "Content-Type: application/json\r\n" +

                       "Authorization: Bearer " + DEVICE_SECRET_KEY + "\r\n" +

                       "\r\n" + data;

​

  sendCommandToESP8266("AT+CIPMUX=1", 5, "OK");

  sendCommandToESP8266("AT+CIPSTART=0,\"TCP\",\"" + HOST + "\"," + PORT, 15, "OK");

  String cipSend = "AT+CIPSEND=0," + String(postRequest.length());

  sendCommandToESP8266(cipSend, 4, ">");

  sendData(postRequest);

  sendCommandToESP8266("AT+CIPCLOSE=0", 5, "OK");

}

​

void sendCommandToESP8266(String command, int maxTime, char readReplay[]) {

  Serial.print(countTrueCommand);

  Serial.print(". at command => ");

  Serial.print(command);

  Serial.print(" ");

  while (countTimeCommand < (maxTime * 1))

  {

    esp8266.println(command);

    if (esp8266.find(readReplay))

    {

      found = true;

      break;

    }

​

    countTimeCommand++;

  }

​

  if (found == true)

  {

    Serial.println("Success");

    countTrueCommand++;

    countTimeCommand = 0;

  }

​

  if (found == false)

  {

    Serial.println("Fail");

    countTrueCommand = 0;

    countTimeCommand = 0;

  }

​

  found = false;

}

​

void sendData(String postRequest) {

  Serial.println(postRequest);

  esp8266.println(postRequest);

  delay(1500);

  countTrueCommand++;

}