Overview
You can link multiple Nest thermostats to a single No Longer Evil account. This is perfect for:- Multi-zone homes with multiple thermostats
- Managing thermostats in different properties
- Testing devices before deploying to production
Prerequisites
Before claiming an additional device:How to Claim a Device
1
Generate Entry Code
On the Nest thermostat you want to link:
- Navigate to Settings → Nest App → Get Entry Code
- A 7-character code will appear (e.g.,
K2P9WXL) - Note the code (it expires in 1 hour)
2
Open Dashboard
Go to nolongerevil.com and log in to your account.
3
Add Device
In the dashboard:
- Click “Add Device” or the ”+” button
- Enter the 7-character entry code
- Click “Claim Device”
4
Device Linked
If successful, the device will appear in your dashboard immediately with:
- Device serial number
- Current temperature
- Connection status
Entry Code Details
How Entry Codes Work
Entry codes are temporary 7-character strings that link a device to your account:- Generated on-demand by the thermostat
- Single-use - each code can only claim one device
- Time-limited - expires after 1 hour (3600 seconds by default)
- Random - uses secure random generation
- Case-sensitive - must be entered exactly as shown
Why Entry Codes?
Entry codes provide a secure way to link devices without requiring complex authentication on the thermostat:- User-friendly: Easy to type and read
- Secure: Short-lived and single-use prevents unauthorized access
- Offline-capable: Can be generated without internet (code validated when connected)
- No credentials needed: Don’t need to enter passwords on the thermostat
Managing Multiple Devices
Once you have multiple devices linked:Viewing All Devices
The dashboard shows all your devices in a grid or list view:- Device name (customizable)
- Current temperature
- Target temperature
- Heating/cooling status
- Last seen timestamp
Renaming Devices
1
Click Device Settings
Click the gear icon or settings button on a device card
2
Edit Name
Enter a friendly name like:
- “Living Room”
- “Master Bedroom”
- “Guest House”
- “Basement”
3
Save
Click Save - the new name appears everywhere in the dashboard
Removing Devices
To unlink a device from your account:1
Device Settings
Open the device settings menu
2
Remove Device
Click “Remove Device” or “Unlink”
3
Confirm
Confirm the removal
Troubleshooting
Entry code says 'Invalid'
Entry code says 'Invalid'
Possible causes:
- Code was mistyped (check for 0/O, 1/I/L confusion)
- Code expired (>1 hour old) - generate a new one
- Code already used - generate a new one
- Device not connected to WiFi - check network
Entry code says 'Expired'
Entry code says 'Expired'
Entry codes are only valid for 1 hour after generation.Solution: Generate a new code:
- Settings → Nest App → Get Entry Code
- Enter the new code immediately
Device appears offline immediately after claiming
Device appears offline immediately after claiming
The device may not be connected to WiFi or can’t reach No Longer Evil servers.Check:
- WiFi connection on the thermostat (Settings → Network)
- Internet connectivity
- Firewall not blocking port 443
Can't find 'Get Entry Code' option
Can't find 'Get Entry Code' option
Make sure:
- No Longer Evil firmware is installed (see the No Longer Evil logo on boot)
- Device has completed first boot
- You’re in Settings → Nest App (not Settings → App)
Security Considerations
Physical access required: To claim a device, someone must have physical access to the thermostat to retrieve the entry code. This prevents remote hijacking of devices.