To fix a Litter-Robot 4 that keeps disconnecting from Wi-Fi, restart it, check its 2.4 GHz connection, and reconnect through Update Network in Whisker. Check the Connect indicator first to choose the right fix: white means Wi-Fi is off, blinking blue means it is reconnecting, and blinking yellow means it is awaiting setup.
The short version
- Read the light: Solid blue means connected, white means Wi-Fi is off, blinking blue means reconnecting, and blinking yellow means setup mode.
- Restart first: For blinking blue, switch the robot off, disconnect external power for 15 seconds, restore power, and allow 30 seconds to reconnect.
- Check the network: Move the robot nearer the router and use a 2.4 GHz network when reconnecting.
- Reconnect in Whisker: Select your robot, open Settings, and choose Update Network before deleting its registration.
| Check or fix | When to use it |
|---|---|
| Read the Connect indicator | Before choosing a connection fix |
| Enable Wi-Fi | Steady white Connect indicator |
| Unlock physical controls | Button presses produce a momentary red flash |
| Refresh Whisker | Stale information, spinning app, or apparent offline state |
| Restart the robot | Blinking blue Connect indicator |
| Toggle the Wi-Fi connection | A previously onboarded robot stays disconnected |
| Improve signal and disconnect boosters | Weak signal or onboarding with boosters |
| Restart the router and check setup barriers | Reconnection fails despite basic checks |
| Provide a dedicated 2.4 GHz network | Setup problems on a combined-band mesh network |
| Update Network | Changed credentials or blinking yellow on a previously onboarded robot |
| Check network visibility and credentials | Your network cannot be selected during onboarding |
| Repair Bluetooth discovery | Your phone cannot discover the robot during setup |
| Review iPhone permissions | Setup needs camera or Bluetooth access |
| Review Android permissions | Setup needs requested hardware permissions |
| Install or update Whisker | The app is missing or an update is available |
| Use the official app download page | You need the mobile app download links |
| Update robot firmware | Connectivity has returned and an update is available |
| Authorize the robot in router security | Your router requires device approval |
| Check MiMo or QOS | Your router exposes these controls and connection problems persist |
| Check firewall access | A restrictive network blocks cloud access |
| Interrupt all robot power | Persistent problems, especially with a backup battery |
| Delete the app registration | Restarting and Update Network fail; registration must be rebuilt |
| Onboard again | The registration is missing, deleted, or reset |
| Restore factory defaults | Persistent setup failures; settings return to factory defaults |
| Resolve QR scanning failures | Reconnection requires onboarding but scanning fails |
| Check account and serial-number ownership | The robot is missing or its serial number is already claimed |
| Identify hardware faults | The robot displays a diagnostic light pattern |
| Use Whisker troubleshooting or human support | The applicable connection fixes fail |
| Check warranty replacement options | Your robot has applicable warranty coverage |
Check the Connect light and the app
If the Connect indicator is white, press Connect once and wait for blinking blue to become solid blue. This also applies when Wi-Fi switches off after a firmware update. If a button press produces a momentary red flash, hold Cycle + Reset for three seconds to toggle Control Panel Lockout, then retry the required button operation.
A solid blue Connect indicator means the robot is connected. If Whisker still shows an offline state, spins, or displays stale information, check that your home Wi-Fi and internet connection work, along with your phone’s cellular or Wi-Fi internet connection. Completely close Whisker by swiping it away, reopen it, and retry.
A blinking blue indicator means the robot is disconnected and trying to reconnect, so continue with the restart below. For a previously onboarded robot with a blinking yellow indicator, use Update Network to reconnect it.
Restart the robot and its WiFi connection
For a blinking blue Connect indicator, press Power to switch the robot off. Disconnect external power for 15 seconds, reconnect it, then press Power. Allow 30 seconds for reconnection before moving on.
A previously onboarded robot can also reconnect by toggling its Wi-Fi connection. Holding Connect too long can enter onboarding and forget the saved network. Press Connect for one second until the indicator becomes white, wait 30 seconds, then press Connect for one second again and wait for solid blue.
Improve the signal and check the router
Move the robot nearer the router to address a weak Wi-Fi signal. If you are reconnecting through onboarding, disconnect Wi-Fi boosters during that process and retry. Restart the router by unplugging it for 30 seconds and reconnecting it.
For a combined-band mesh network, open the router’s administration interface and create a 2.4 GHz-only guest network, or temporarily disable 5 GHz. Connect your phone to that 2.4 GHz network before reconnecting the robot. Router labels vary, so use your router’s corresponding controls.
During setup, disable your VPN and use a private network without a captive portal. Recheck the network name and password, including capitalization. If reconnection still fails, update the robot’s saved network next.
Reconnect through Update Network
Open Whisker, select your Litter-Robot 4, then open Settings > Update Network. Complete the displayed connection prompts using your 2.4 GHz network name and password. Use this route after changing your router, network name, or password, and for a previously onboarded robot whose Connect indicator blinks yellow.
If the network cannot be selected during onboarding, enable SSID broadcasting in the router settings and use a password-protected network with a name shorter than 31 characters. Whisker’s network-selection instructions specify an onboarding password of 8 to 31 characters without slashes, periods, @ signs, apostrophes, or spaces. Try a separate guest network if you prefer to keep your main network’s credentials unchanged.
When setup cannot discover the robot over Bluetooth, keep your phone near it. Toggle Bluetooth off and on, restart Whisker, and reboot the phone if needed.
Removing an existing robot Bluetooth pairing removes that saved pairing from your phone. If a robot pairing is already present in your phone’s Bluetooth settings, remove it before retrying setup.
On an iPhone, open Settings > Privacy & Security > Camera and enable Whisker if listed, then repeat under Bluetooth. You can also review Local Network permissions under Privacy & Security if Whisker has requested access.
On Android, open Settings > Apps > Whisker > Permissions, selecting See all apps first if necessary. Open Camera and select Allow only while using the app; for requested Nearby devices access, select Allow. Review Location if requested. Permission choices vary by Android version, and Google notes that some instructions require Android 11 or later on Pixel.
Update Whisker and the robot firmware
Find Whisker in the App Store or Google Play Store and tap Update when offered, then Open. For a new installation, tap Get or Install. You can also obtain the app through the download links on the official Whisker app page.
Once the robot is connected to home Wi-Fi, select it in Whisker and open Settings > Firmware Information. On Firmware Updates, tap Update if an update is available. Leave the robot powered and idle while it completes, which can take 15 minutes, then check Firmware Information afterward.
If the Connect indicator turns white after the update, press Connect once to turn Wi-Fi back on. Wait for blinking blue to become solid blue. If it stays blinking blue, return to the connection and network checks.
Check router access controls
Open your router’s administration interface and check whether its IoT device security requires approval for internet access. If it does, authorize Litter-Robot 4.
On routers that expose MiMo or QOS controls, locate and disable the available setting, then retry the connection. The actual labels depend on your router.
For a restrictive home or administratively managed network, check firewall rules for blocked HTTPS access on ports 443 and 8443. Follow the router manufacturer’s instructions to permit the required access.
Try a complete power interruption before resetting
If the problem persists, completely close Whisker and unplug the robot. Disconnect its backup battery too, if one is installed, because that battery can keep it powered after unplugging. Leave power disconnected for at least five minutes, restore power, and allow startup and cycling to finish before reopening Whisker when the blue Ready indicator appears.
When restarting and Update Network have failed, you can delete the robot’s registration and onboard it again. Deleting the robot removes its app registration. In Whisker, select the robot, open Settings > Delete Robot, and complete the in-app prompts.
Entering onboarding with a long Connect press forgets the saved network. Enable your phone’s Bluetooth, then hold Connect for three seconds until the indicator blinks yellow. Sign into Whisker, tap the + button, and select Litter-Robot 4.
Follow the setup prompts, tap Ready to Scan, and scan the robot’s QR code. Name the robot, connect through Bluetooth, and enter your home 2.4 GHz Wi-Fi credentials. Complete the remaining displayed prompts.
For persistent setup failures, including secure-session errors, a factory reset is a later option. A factory reset restores the robot’s settings to factory defaults and requires onboarding again. With the power on, hold Reset + Empty for three seconds, wait for the reboot, then repeat onboarding.
Recognize a hardware fault and get help
If you see a blue light bar with a white-flashing Wi-Fi button, Whisker identifies this as a defective Wi-Fi chip and directs base replacement. A steady white Connect indicator instead means Wi-Fi is off. If the Power button flashes blue, check the power connections and have support determine whether the power supply needs replacement.
If those diagnostic patterns appear, or the robot still disconnects after the applicable fixes, open the Whisker troubleshooting assistant. Describe the disconnects and follow its diagnostic questions; unresolved cases can reach a product specialist. Alternatively, on Whisker’s support page, select contact Whisker Customer Experience or Submit a ticket.
Frequently Asked Questions
What should you do if the QR code will not scan during reconnection?
Clean your phone’s camera lens and improve the lighting. Try the QR code on the box, the rear base, or inside the base after removing the waste drawer, and update your phone’s operating system. If scanning still fails, onboard with another phone or tablet, then sign into the same account on your usual phone.
Why is the robot missing from your account or showing a serial number already in use?
Sign out of Whisker and sign in with the email originally used for onboarding, and check whether another household member registered the robot. For a claimed serial number, failed registration, or second-hand ownership, submit a support request with a serial-number photo. Ownership changes also require the requested purchase or gift evidence and a robot photo.
Can you get replacement parts through your warranty?
For a Litter-Robot 4 covered by an applicable warranty, sign into your Whisker account to access eligible replacement parts. Have support identify the appropriate replacement for the diagnosed fault.
Can firmware update automatically without starting an update in the app?
Yes, firmware updates also install automatically when they become available for your unit. You can check Firmware Information in Whisker afterward to review the robot’s firmware.