The GW04 Gateway is a mains-powered device that connects wirelessly to your broadband router through the Ember App, enabling communication with EPH’s RF Programmable Thermostats (CP4D & CP4V2), the CP4-HW-OT, and various Version 2 (v2) programmers, including R/S, TSv2, and US systems.

This gateway uses RF communication to link with your heating controls and connects to the EMBER cloud server via your home WiFi network, supporting both 2.4GHz and 5GHz wireless networks for flexible connectivity.