How do I verify that devices in the room are communicating properly with the e7w Thermostat?

Enter Service Mode and use the PNG (Ping) parameter to test device communication. Select the target device address using UP/DOWN arrows, press FAN to start pinging, and the e7w will display the device type code, major/minor software versions, and AGC signal level. Use the DOR parameter to verify door sensors, WIN for window sensors, and PIR for motion sensor detection. (Pages 37-38, 56-57)