What is the effect of using SYSTEM_MODE(AUTOMATIC) with a Gateway and an Electron?
I have 3 Bluz units connected to a Gateway equipped with an Electron. I want to retain the capability of changing some variables on the Bluz units (via Particle Functions on the Bluz firmware) using my phone ONLY if I am in the vicinity of the Bluz units. However, I do not want this to cause the Electron to connect to the cloud (for reducing data usage).
I would appreciate your input on the best way of accomplishing this?