Published events arrives but no data

Troubleshooting
1

Hi I’m trying the pubish/subribe pattern, getting the data to a python server. I get the messages at my server, however almost only 1 of 20 messages have data, the others are empty. Can someone tell me what going on!?

This is my core code:

int number;


void setup() {
    Spark.variable("number", &number, INT);
    Serial.begin(9600);
}

void loop() {
  delay(200);
  if(random(100) < 5) {
    Serial.println(millis());
    String data = String(number); 
    Spark.publish("event",data);
  }
}

int newNumber(String command) {
    number = random(10000);
}

btw you can find the Python Sparkcloud API here:

2

@tinkerly, from the looks of it, you are publishing too quickly. The (now documented) limit is 1 per second with a burst of 4 per second. You are possibly exceeding that limit, causing a drop in events. The if(random(100) < 5) is the only code that may or may not slow things down. You may want to add a test (using millis() for example) to ensure you wait a minimum of 1000ms before publishing again. :smile:

4 Likes
3

okay, havent checked the event-intervall, didnt seem so much tho on the server. but I’m gonna add a time-buffer to it. thanks @peekay123

4

Just out of curiosity, where do you call newNumber()?

And without checking your subscribing code, are you sure you’re only receiving your own events?
Since you are using a - pardon the term - rather common event name, you might see some similarly “boring” events from others, not carrying any data.

It’s always better to choose some “imaginative” event names :wink:

3 Likes