[MQTT] How can I send data to ubidots with MQTT

Projects Programming
1

Hello

Some of you has experience with Ubidots and MQTT?

I do have a Feather MO Adalogger and a Fona808. Feather is based on Arduino Zero

I imported the libraries

#include <Adafruit_FONA.h>
#include <Adafruit_SleepyDog.h>
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_FONA.h"

I have not imported Ubidots_Fona as Feather MO does not support SoftwareSerial. But I create a new function in Adafruit_Fona to collact the GPS coorditate as does Ubidots_Fona

void Adafruit_FONA::ubidotsAdd(char *variable_id, float value, char *ctext1) {
  // http://forum.arduino.cc/index.php?topic=441449.new#new
    Serial.print(F("Ubidots: "));
    Serial.print(variable_id);
    Serial.print(F(", ")); Serial.print(value);
    Serial.print(F(", ")); Serial.println(ctext1);
    
    Serial.print(F("CurrentValue: ")); Serial.println(currentValue);


    // (val+currentValue)->varName = variable_id;
    val[currentValue].varName = variable_id;
    // (val+currentValue)->ctext = ctext1;
    val[currentValue].ctext = ctext1;
    // (val+currentValue)->varValue = value;
    val[currentValue].varValue= value;
    currentValue++;
    if (currentValue > MAX_VALUES) {
        currentValue = MAX_VALUES;
    }
}

I need to send data to Ubidots and I want to use MQTT to do it.

Some of you has a experience with MQTT and Ubidots?

I can send data to Adafruit IO with MQTT, but I do not know how I have to foemat the value to be sent to Ubidots, and which port to use

Here is how I do to Adafruit IO
Connection:

sprintln(F("\nMQTT connection"),2);
  sprintln(F("- - - - - - - - - - - - - - - - - -"),2);
  if (!mqtt.connected()) {
   
    // Now make the MQTT connection.
    int8_t ret = mqtt.connect();
    if (ret != 0) {
      sprintln(mqtt.connectErrorString(ret),2);
    }
    sprintln(F("MQTT Connected!"),2);
  }
  else
  {
    sprintln(F("MQTT already Connected!"),2);
  }

Send:

// data has the value 0,46.1234,7.9999,0
logLocation(data, location_feed, positionFromSd)

bool logLocation(char* data, Adafruit_MQTT_Publish& publishFeed, bool positionFromSd)
{
//  char sendBuffer[120];
  
  char path_file[SD_PATHSIZE+FILESIZE];
//  memset(sendBuffer, 0, sizeof(sendBuffer));
  //int index = 0;

  get_Time(yyyy,mm,dd,hh,mn,sec,range);

  // Start with '0,' to set the feed value.  The value isn't really used so 0 is used as a placeholder.

  //sprintf(sendBuffer,"%s,%g,%g,%g","0",latitude,longitude,altitude);

  // Finally publish the string to the feed.
  sprint(F("\nPublishing location: "),2);
  sprintln(data,2);
  if (!publishFeed.publish(data)) {
    sprintln(F("MQTT Publish location failed!\n"),2);


    return false;
  }
  else
  {
    sprintln(F("MQTT Publish succeeded!\n"),2);
    return true;
  }
}

Excepted if I wrongly copied the code, the above code work.

But now, how can I do it with Ubidots?
How can I format the string?
Which port to use.

Ubidots provide exemple for Practice, but I have not found exemple for Arduino (or Adafruit).

Some of you has an experience?
Feel you free to ask me for more detail

Many thank for your help