gistfile1.cpp

#include <ESP8266WiFi.h>

const char* ssid = "...";
const char* password = "...";
const IPAddress ip(10, 0, 0, 14);
const IPAddress gateway(10, 0, 0, 1);
const IPAddress subnet(255, 255, 0, 0);

const char* host = "10.0.1.1";
const int port = 8889;

void setup() {
  Serial.begin(115200);
  delay(10);

  //WiFi.config(ip, gateway, gateway, subnet);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.print("Connected. IP Address: ");
  Serial.println(WiFi.localIP());
  Serial.println(WiFi.gatewayIP());
  Serial.println(WiFi.subnetMask());

  delay(1000);

  request("PUT", "/devices/me/attributes", "{\"temperature\":{\"temperature\":4}}");
}

void loop() {
  // put your main code here, to run repeatedly:

}

void request(String method, String url, String body) {
  WiFiClient client;
  if (!client.connect(host, post)) {
    Serial.print("connection failed");
    return;
  }

  client.print(method+" "+url+" HTTP/1.1\r\n" +
    "Host: "+host+"\r\n"+
    "Accept: application/json\r\n"+
    "Content-Type: application/json\r\n"+
    "Connection: close\r\n\r\n"+body);
  delay(10);

  while (client.available()) {
    String line = client.readStringUntil('\n');
    Serial.print(line);
  }

  Serial.println();
}