Hi. I want to control an iot device that has its own state. I think the best way would be to have a copy of the state in a genserver so I don’t have to retrieve it every time. Simple example is a ligh tbulb with colors. I set the color -the bulb changes it but it’s also saved it the genserver state …

Unless you’re absolutely sure your device can only be accessed by a single GenServer this approach seems Ok: saving state in the process while requesting a change in the device. Otherwise, you might have to ask for a change with “knowledge” of the previous state, e.g. “set color to red if it’s blue”…

You may want to checkout my Lifx library. I haven’t touched it in a while, but it does represent each bulb as a process. https://github.com/rosetta-home/lifx

[image] paulo-f-oliveira: r a change with “knowledge” of the previous state, e.g. “set color to red if it’s blue”: in this case, if there’s a mismatch with the process state, you should fetch it from the device, store it I imagine (with the radio example because it’s more complicated) to have…

[image] entone: ed it in a while, but it does represent each Thanks. I’ll defenetly check it out.

Looking for library example to control iot device with own state

Questions & Help Questions

dkuku September 21, 2022, 7:14am 5

Thanks. I’ll defenetly check it out.