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By trackerj
#26586 Looking a bit deeper to a Konig 433Mhz Wireless station with hygro-thermometer (KN-WS400N) had a lot of fun decoding the communication protocol.

Full Article, for reference: http://www.esp8266-projects.com/2015/08/mailbag-esp8266-weather-station-433mhz.html

After that, using some cheap 433Mhz radio modules and a ESP8266 CBDB Dev Board equipped with a DHT22 temperature/humidity sensor managed to directly upload data wireless to the Konig wireless station: