Here's a cool project for farm telemetry: http://www.geekstips.com/two-esp8266-communication-talk-each-other/ http://www.geekstips.com/two-esp8266-communication

Here's a cool project for farm telemetry: http://www.geekstips.com/two-esp8266-communication-talk-each-other/ http://www.geekstips.com/two-esp8266-communication-talk-each... Star-mesh topology, with batteries on the leaf nodes. Solar further in. Excerpt: "I’m expecting about 3 months at a 5min log interval using a 2000mAh lipo battery."