This is a transciever placed in the laundry room. It has a DHT-11 that reads the current temperature and humidity in the room. It also has a current sensor that monitors the washing machines power consumptions. The results are sent via RF to the master device. The unit also has a small LCD like the ones used in old mobiles like the Nokia 5110. This display shows the temperature and the humidity. It also shows the current time which is received from the master.
The code and the schematics are on Github.