[SOLVED] Adding context while publish

IoT Devices
1

Hello, I am establishing an MQTT connection and publishing it to the Ubidots dashboard. I want to just add the Context like “Motion Detected” while publishing.

And I am using this code in Arduino IDE with ESP32:

  reconnect();
  }
  sprintf(topic, "%s%s", "/v1.6/devices/", DEVICE_LABEL);
  sprintf(payload, "%s", ""); // Cleans the payload
  sprintf(payload, "{\"%s\":", VARIABLE_LABEL); // Adds the variable label
  
  float sensor = analogRead(sensor);
  dtostrf(sensor, 4, 2, str_sensor);
  sprintf(payload, "%s {\"value\": %s}}", payload, str_sensor); // Adds the value
  Serial.println("Publishing data to Ubidots Cloud");
  client.publish(topic, payload);
  client.loop();
  delay(1000);

In Dashboard, I am getting ----- line in place of context.
So what changes I have to make in the above code? Please help me out.

2

Hi there, you may refer to the GPS tracker example here.

All the best

3

Sorry for late response, and Thank you so much for the help. And now I am able to do what I wanted. Thanks again