why does my thermostat keep losing connection to wifi? i have to keep re-adding it in the app.

Diagnosis

The Vine TJ-610 utilizes a low-power 2.4GHz Wi-Fi chipset that is highly susceptible to "signal drop-off" and DHCP lease expiration. The root cause is typically a combination of poor signal penetration through wall materials (like drywall or brick) and the thermostat's inability to automatically re-authenticate with the router after a momentary signal dip. When the connection drops, the TJ-610 fails to initiate a handshake request, causing the device to enter an "Offline" state that requires a manual reset and re-pairing within the app to restore the token. Furthermore, many modern routers use "Smart Connect" or "Band Steering," which attempts to push devices toward the 5GHz band. Because the TJ-610 hardware is physically incapable of seeing 5GHz signals, the router may intermittently drop the 2.4GHz connection while trying to "optimize" the device's connection, effectively kicking the thermostat off the network. You can confirm this by checking the Wi-Fi icon on the main display; if it disappears or flashes during a temperature change, the device is losing its IP lease.

How to Fix It

To stabilize the connection and prevent the need for constant re-pairing, follow these precise configuration steps:

1. Verify Signal Strength: Press the 'Menu' button on the TJ-610 interface. Navigate to 'Wi-Fi' and then 'Signal'. If the signal is below 3 bars (roughly -70dBm or lower), the connection will be unstable. You must move your router closer or install a 2.4GHz-specific range extender within 15 feet of the thermostat.
2. Isolate the 2.4GHz Band: Access your router's administration panel via your web browser. Disable 'Smart Connect' or 'Band Steering'. Create a separate SSID specifically for 2.4GHz devices (e.g., "HomeWifi_2G"). Connect the TJ-610 exclusively to this dedicated 2.4GHz network.
3. Assign a Static IP: In your router's DHCP settings, locate the MAC address of the TJ-610. Assign a "Static IP" or "DHCP Reservation" to the device. This prevents the router from assigning a new IP address to the thermostat, which is a common cause of the device appearing offline in the app.
4. Set Security to WPA2-PSK (AES): Ensure your security protocol is set strictly to WPA2-PSK. The TJ-610 often struggles with WPA3 or "Mixed Mode" security settings, which can cause the authentication token to expire prematurely.
5. Hard Reset and Re-pair: Once the network settings are locked, perform a factory reset on the TJ-610. Go to Menu > Settings > Reset. Then, re-add the device to the app using the newly created 2.4GHz SSID.

If That Didn't Work

• Change the Wireless Channel: Log into your router and change the 2.4GHz channel from 'Auto' to a fixed channel. Use channel 1, 6, or 11. These are non-overlapping channels that reduce interference from neighboring Wi-Fi networks and household electronics like microwaves.
• Check C-Wire Power Stability: Ensure the thermostat is receiving consistent 24V AC power via the C-wire. If the device is relying on "power stealing" (without a C-wire), the Wi-Fi radio will periodically shut down to save power for the relay, causing the app to report the device as offline. Install a 24V C-wire adapter if necessary.
• Disable Firewall Restrictions: Some advanced routers have "MAC Filtering" or "Access Control" enabled. Ensure the TJ-610's MAC address is on the "Allow" list and that port 80 and 443 are open for outbound traffic to the thermostat's cloud server.
• Update Router Firmware: Outdated router firmware can cause "zombie connections" where the router thinks the device is connected, but the TJ-610 has timed out. Update your router to the latest manufacturer firmware version.

Heads Up

• Strictly 2.4GHz: The TJ-610 hardware is physically incompatible with 5GHz networks. If your router only broadcasts 5GHz, the device will never find the network.
• Avoid Metal Obstructions: Do not install the thermostat directly behind metal panels or large mirrors, as these act as RF shields and will drastically reduce the Wi-Fi radio's range.
• App Cache: If the thermostat shows as offline but is actually working, clear the cache of your mobile app and restart your phone; sometimes the "Offline" status is a reporting error in the app rather than a hardware failure.
• Power Cycling: If the device freezes, a quick power cycle (flipping the HVAC breaker for 30 seconds) is more effective than a soft reset for clearing the Wi-Fi chip's memory.