I have Honeywell Wi-Fi thermostats for each of my two heating zones, which report their status periodically to Honeywell. If the connection is lost, Honeywell sends me an email reporting that (hourly, for each thermostat). This morning, when I checked my email, I had 6 messages from Honeywell reporting that connectivity had been lost (3 for each thermostat); the most recent about two hours earlier. I really only know about Wi-Fi problems when our phone's streaming is weak - we get cellular reception throughout the house, although it's weak in some areas. So, what could have cause the Wi-Fi to quit for 3 or so hours? It's been working fine all day.