eZNT-Wi Programmable Wi-Fi Thermostat Application Guide
Edition 1.4
Page 49 of 126
Issue
Action / Expected Result / Comment
Signal
Strength
Verify signal strength from router and the wireless thermostat.
See the AV94 (WiFi_RSSI) entry in the Object Instances
Numbers table in the
section. AV94 contains
the Wi-Fi signal strength value from the IP1.RSSI property.
For the eZNT-Wi and eZNTW-Wi, the RSSI signal strength in dB
shows on the default display to help troubleshoot connections
during Wi-Fi setup. When the thermostat is connected to a
wireless network, the temperature reading in degC shows on
line2 and the RSSI value shows on line3 of the display. If the
thermostat is not connected to a wireless network, line3 shows
a signal strength value of 0.
An RSSI value of -70dB or less indicates a weak signal with
higher chances of wireless communication problems such as
offline devices. Database save/ load and firmware flashing
operations also may fail. Communications are also affected by
the wireless noise in the environment and the number of
devices on a channel and the channel overlap.
The router rOU) menu item indicates the Wi-Fi signal strength
(AV94) by displaying 0 (very weak) to 5 (very strong) curved
bars. It is recommended to have a signal strength of at least -
70 dB (2 bars).
In addition, when a stat with Wi-Fi is powered up without a
database, the Wi-Fi signal strength shows on line3 of the
display.
Recover from
incorrect
configuration.
Verify SSID and password for router.
Sometimes a Run/Clear procedure must be done to return the
database to the factory default and also to remove any retained
network settings information.
See
Appendix A: Database Operations
for the steps required to
put an thermostat back into the default factory state.
