I am using Photon1 (master) with a 4 line LCD & DHT22 to monitor & display house environment data. Photon1 also has two buzzers Subscribed to Photon2 & Photon3 (slaves), which Publish alerts when an alarm condition is required. Photon2 monitors building low temperatures to turn on a heater and m…

@DGG-KY , the slaves can Particle.publish() their data and the master can Particle.subscribe to those published events and decode/display the data.

Can you give an example? I understood only fixed strings could be used, as shown in my example void Heater_Status( const char *event, const char *data) { if (strcmp(data, “on”)==0) { // turn on heater } else if (strcmp(data, “off”)==0) { // turn off heater } }

Any string can be published and caught via subscriptions. Have a look here [image] Help with subscribe - reading .publish from other photon Getting Started I am trying to grab a part of data from my other photon to display on a led connected to another photon. This code …

Another method would be UDP... constantly updating the master device locally. No need to bounce off of the cloud. [image] Cannot get UDP to work between two Photons Firmware Hello, I am kinda new to Photon and have read the documentation on the firmware, but the examples…

1 master 2 slave photons, sharing variables

Cloud

BulldogLowell January 10, 2017, 12:19pm 5

Another method would be UDP... constantly updating the master device locally. No need to bounce off of the cloud.

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1 master 2 slave photons, sharing variables

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