An office building has been equipped with smart thermostats to control the HVAC systems. An older section of the building uses an older version of the smart devices, while the newest and most recently built section of the office building uses the newest version of the vendor's device. The thermostats are connected to the building’s Wi-Fi network and configured to report temperature data to a central server. However, the thermostats occasionally stop sending data. What is the most likely cause of this issue?
Incorrect IP address configuration on the thermostats.
Network congestion leading to insufficient bandwidth for the thermostats.
Proximity of the thermostats to the Wi-Fi access points.
Firmware issues with the smart thermostats.
Proximity of the thermostats to a microwave oven or other interference causing device.