Hi, quick question, if you have the loop function on your core whizzing round and round doing stuff and suddenly a Spark.function gets called say from a web page, does the loop function pause while the Spark.function is serviced a bit like an interrupt function call ?

To extend Harrison’s answer a bit. The default name of the function loop() is a bit misleading, since it not actually behaves like a loop at all - or rather only like a loop that always ever runs one iteration :wink: But it is inside another bigger (“hidden”) endless loop that does things before a…

Oh, ok, that’s useful to know, so it’s like the user stage of a cycle, then there’s the system stage and then back to the users turn :slight_smile: Important to know if the user part is doing a lot and takes a long time to complete as the pending Spark.function/variable request would take a while u…

Exactly :+1: And from your reaction I gather you also haven’t heard of the 10sec limit. If you code prevents the “system stage” to do its job more than that the cloud connection will drop out. To avoid that, you’d have to explicitly call SPARK_WLAN_Loop() or Spark.process() during long running sec…

Ahh, that may explain a problem I’ve been experiencing, I’m using TCPClient in the loop to send a GET to a server, the servers reaction is to call a Spark.function. I’ve been experiencing a rapid flashing cyan LED sometimes, I assume then that it may be caused by the TCP request taking longer than 1…

Yes, this might well be. So if you just add a SPARK_WLAN_Loop(); within your while() { } this might go away.

I guess this should do it, just under the else block :smile: /* add this because the spark core needs to service the cloud connection every 10 seconds and if this loop function takes longer than ten seconds it will cause a cloud reconnect if SPARK_WLAN_Loop isn't called */ if((millis() - wlan…

When do Spark.functions run

General

harrisonhjones January 9, 2015, 2:47am 2

At the end of loop() a bunch of other functions are called which maintain the connection to the cloud and handle things like Spark.Function(). Once that’s over loop() is called again. Make sense?

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When do Spark.functions run

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