WiFi Sensor in Water Resistant Housing
This WIFI-enabled device connects directly to your WIFI router, so you send temperature readings to monitoring application. It is fully assembled and requires no soldering. Connect it to power and it will advertise itself as a wireless access point. Configure it through a web browser using its easy-to-use config application. Once configured, it will connect to your WIFI network, which will give it access to the internet.
All that in a sealed Water Resistant housing with internal power supply.