I'm working on a project were I have to build a network of battery powered sensors over a territory the size of a small town.The sensors will monitor power consumption, temperature and humidity in energy poor households. Often the families in that situation can't afford an internet connection at home so WiFi is out of question. GPRS would be an option but lately other radio technologies have come to my interest....
Moving from the ESP8266 world I've been diving lately I still love the simplicity of battery powered Moteino nodes. You might know I'm migrating my XBee-based sensor network at home to an RFM69 one. So long I have changed my door monitor and my weather station. They are sensing and reporting to my RFM69GW, an ESP8266 bridge board using a custom firmware. Time to go for the power monitor. A long time ago (actually 2 years but it really feels like a century ago) I was living in a big city and we had one of those fancy “smart meters” with a LED pulsing 4000 times every kWh....
