A simple MQTT sketch to upload values to Ubidots

SendValues_MQTT_LinkitOne.ino

#include <LWiFi.h>
#include <LWiFiClient.h>
#include <PubSubClient.h>

// These are the variables you will want to change based on your IOT data streaming account / provider

#define TOPIC "/v1.6/devices/YOUR-DEVICE-LABEL"
#define TOKEN "YOUR-UBIDOTS-TOKEN
#define WIFI_AP "UBIWIFI"
#define WIFI_PASSWORD "clave123456789ubi"
#define WIFI_AUTH LWIFI_WPA

char payload[180];  // Reserve a char to store the Ubidots data. Account for 60 bytes per variable. 
char le[4];
char mqttBroker[] = "things.ubidots.com";
String response;
LWiFiClient c;
PubSubClient client(c);
int horometro = 0;

void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Attempt to connect
    if (client.connect("linkit-one",TOKEN,"")) {
      Serial.println("connected");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
    }
  }
}

void setup()
{
  Serial.begin(115200);             // setup Serial port
  LWiFi.begin();
  // keep retrying until connected to AP
  Serial.println("Connecting to AP");
  while (0 == LWiFi.connect(WIFI_AP, LWiFiLoginInfo(WIFI_AUTH, WIFI_PASSWORD)))
  {
    delay(1000);
  }
  Serial.println("Wifi connected!");
  client.setServer(mqttBroker, 1883);

}

void loop(){
  int temp = analogRead(A0);
  int presion = analogRead(A1);
  horometro = horometro + 1;

  sprintf(payload,"%s", "{\"temperature\":");
  sprintf(payload,"%s%d", payload, temp);
  sprintf(payload,"%s%s", payload, ",\"presion\":");
  sprintf(payload,"%s%d", payload, presion);
  sprintf(payload,"%s%s", payload, ",\"horometro\":");
  sprintf(payload,"%s%d", payload, horometro);
  sprintf(payload,"%s%s", payload, "}");
  Serial.println(payload);
  
  if (!client.connected()) {
    reconnect();
  }
  client.publish(TOPIC, payload);
  client.loop();
  
  delay(1000);
}