Hi, Im looking to make weather monitor that consists of: Spark Core nr1 with sensors located outside house. Spark Core nr2 with LCD inside house that displays sensor data from Core 1. Both Cores are connected to internet, but there is no Core to Core wifi signal (they are too far apart). What ar…

Have a look in this thread [image] Spark Variable and Publish/Subscribe trouble [SOLVED] Hi All, I am trying to send temperature readings from one core to another. I think the correct way to do this is by using a spark variable. The MAX 31855 board is giving me data through the spark d…

This might be interesting as well: http://www.hackster.io/maxeust/quantumly-entangled-leds1 The relevants docs are here: http://docs.spark.io/firmware/#spark-publish

Tnx, ill have some reading and lot’s of trial and error ahead of me now :smile:

I made a test code (send and receive though single Core since i don’t have second Core atm), but it doesn’t work quite as it is suppose to. [code] double c = 1; int i=0; void tempHandler(const char *event, const char *data) { i++; Serial.print(event); Serial.print(", data: "); if (data) Se…

@qwerty009 , at first look I’d suspect String() which might not free its allocated heap space correctly. To confirm this, just replace String(c) with a constant string and see. I think you could also drop the delay(500) within the tempHandler since you should only get one event per second, due to d…

Like this? [code]double c = 1; int i=0; void tempHandler(const char *event, const char *data) { i++; Serial.print(event); Serial.print(", data: "); if (data) Serial.println(data); else Serial.println(“NULL”); } void setup() { Spark.variable(“temp”, &c, DOUBLE); Spark.subscribe(“tempe…

Sorry, no. I actually meant more something like Spark.publish("temperature", "Test"); Just for safety, could you also put the Serial.begin() before your Spark.subscribe() statement, so that there will be absolutely no way how Serial.print() could happen before Serial.begin(). Due to your MY_DE…

@qwerty009 , you may also be interested in this recent topic: [image] Spark Variable and Publish/Subscribe trouble [SOLVED] Hi All, I am trying to send temperature readings from one core to another. I think the correct way to do this is by using a spark variable. The MAX 31855 board is…

I’ve now flashed your code on one of my Cores and will try to squash your bug. So far I found that it is an SOS Hard-Fault (one red blink) Edit1: At the moment I at least got rid of the hard fault by removing the Serial.print() statements from the event handler, but the Spark.subscribe() seems v…

@qwerty009 , I think you’d have to wait for your second Core to arrive or find another way to build and test the two sides of your communication, since this seems that “self-subscription” might be an issue Spark will have to look into. I’ll tag @Dave , @mdma and @zach for this reason. Maybe they can …

How to transfer data between 2 cores?

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peekay123 December 30, 2014, 6:26pm 9

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How to transfer data between 2 cores?

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