There’s a really handly little development board called ESP8266 which is able to run Arduino code. My current home automation dashboard is pimatic (yes, lowercase p), and a community member from the pimatic forums koffienl created a project called ESPimatic which makes is (relatively) easy to use the ESP8266 board to interact with pimatic. You can connect various sensors, e.g. DHT22, DS18B20, etc. by wires to the ESP8266, which will connect by WiFi to your home router, and send the sensor information wirelessly to pimatic dashboard.

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