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Very much so! The wireless data has to go over a hill and through trees so no direct line of sight. Could have used high power radio, but with low power and short range and multiple hops there is no interference to the neighbours. Data used to go to xively but they are subscription, so instead goes to Thingspeak. Data is here http://www.smarthome.jigsy.com/ Some minor tweaks to the software along the way, now have 32 nodes instead of 16, and also every node has a display - this uses more power, but it makes debugging a lot easier. I like to see each node talking to at least two others, so there are multiple data paths and the system then can handle a few nodes not working.
WiFi / Internet Controlled Relays using ESP8266 - Quick, 30 minutes IoT project
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