Hello! I’m looking to send an array from one Photon to another. Does anyone have any guidance on how to do so? Can I use a particle.variable()?

Particle.variable() and Particle.publish() are meant for strings only. So in order to send a binary struct you need to serialisation/deserialisation implemented (e.g. base 64/base85 encoding). If you are transfering locally and/or don’t care about security you can go with TCP/UDP transfer too.

Is there a way to turn an array into a string where each value is separated by commas? I have code to parse that information out based on the commas, but I can’t figure out how to get it into that format.

[image] raha: Is there a way to turn an array into a string where each value is separated by commas? Sure there is. What type are the values in your array? Are they Strings, char arrays, numbers? Basically, you just need to create a char array big enough to hold the whole array, loop through …

I got that to work but now I’m having trouble parsing it. I keep getting -1 for valueStr. Any idea why? void player1btns(const char *event,const char *data) { //this is the handler for receiving the subscribed event String newPatternEvent = String(event); String newPatternData = String(data);…

[image] raha: valueStr = newPatternData.indexOf(currentOffset, commaPos); I'm not sure what you're trying to do with that line. The first argument to the indexOf function needs to be a char or String, not an int. Personally, I would parse the char *data using strtok, rather than converting da…

I wouldn’t use String in the handler, but copy the const char* into a big enough char[] and use strtok() for parsing. But with String I’d guess you rather want substring() here valueStr = newPatternData.indexOf(currentOffset, commaPos);

Sending an Array to one Photon from Another

Troubleshooting

BulldogLowell April 4, 2017, 10:16am 8

why not show your data prototype?

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Sending an Array to one Photon from Another

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