How Do I Reconnect My JellyFish Controller After a Router or ISP Change?
- Controller still has the old WiFi credentials
- New network is 5GHz-only / different SSID
- New router band steering
Problem Description
After replacing a router, switching internet providers, or changing WiFi network credentials, the JellyFish controller can no longer connect to the new network because it still has the old WiFi settings stored in memory.
Why This Happens in Real Homes
A JellyFish controller going offline after a router or ISP change is expected — it stored the old network's name and password, and once those change, it can no longer connect and must be re-provisioned with the new credentials. As a 2.4GHz-only device, it also needs the new network to offer 2.4GHz.
Re-run the WiFi setup in the JellyFish app to give the controller the new network's SSID and password, making sure that network provides a 2.4GHz band (split the bands or disable band steering if needed) and uses WPA2/mixed security. Confirm strong 2.4GHz coverage at the controller's outdoor location, and reserve a DHCP IP on the new router. Re-provisioning to the new 2.4GHz network brings it back online.
Symptoms
- Won't reconnect after a router change
- Offline after new router/ISP
- Lost connection after router swap
- Controller offline since router change
- Needs re-setup after new router
- Won't rejoin the new network
- Reconnect fails after ISP change
- Offline after network change
Recognize these? Here's what usually causes it.
Common Causes
- Controller still has the old WiFi credentials
- New network is 5GHz-only / different SSID
- New router band steering
- Different password
- Controller needs re-provisioning
- Weak 2.4GHz on the new setup
- Router security change (WPA3)
- IP/network change
Most fixes happen in the first 3 steps.
The Designer App hotspot password (bigfish10) is a factory default. If your installer changed it, contact them or JellyFish support at 801-613-7421 to retrieve the current password before attempting WiFi setup.
Tools & Requirements
Step-by-Step Solution
Keep a Record of Your WiFi Credentials for JellyFish
Store your 2.4GHz network name and password in a secure location. When you call your ISP for router replacement or change your password, update the JellyFish system the same day to avoid extended offline periods.
Name Your New Router the Same as the Old One
If you are replacing a router, consider giving your new 2.4GHz network the exact same SSID and password as the old one. The JellyFish controller (and other smart home devices) will reconnect automatically without any reconfiguration.
Designer App vs Cloud App
The Cloud App is for daily use. The Designer App is the setup tool. For any WiFi reconfiguration, you need the Designer App. Both can coexist on your phone, but JellyFish recommends removing the Designer App after setup is complete to prevent schedule conflicts.
Multiple Controllers
If you have more than one JellyFish controller, repeat the WiFi setup process for each one separately. Each controller maintains its own network credentials.
Quick Solutions
Still having issues? This is usually the deeper cause below.
If this comes back after following these steps, check whether a recent app or firmware update reset a default setting — the fix works, but the setting gets reverted silently.
Most homeowners who change their router or ISP do not realize the JellyFish controller needs to be reconfigured because the lights continue running on stored schedules. The loss of remote control and cloud reporting is the only immediate symptom. Budget 15–20 minutes per controller to complete the reconnection process.
Hub disconnections that cycle repeatedly are almost always IP conflicts — two devices fighting over the same DHCP lease after a router restart.
- Controller still has the old WiFi credentials
- New network is 5GHz-only / different SSID
- New router band steering
- Different password
- Controller needs re-provisioning
Before you go — try one of these (they fix most cases).
Official Manufacturer Manual
JellyFish Lighting provides official product documentation through their online manual rather than downloadable PDF. Access setup guides, troubleshooting steps, and product specifications for your JellyFish Lighting System.
Source: jellyfishlighting.com
Need More Help? JellyFish Lighting Support
Note: The contact information below connects you directly to JellyFish Lighting's official customer support team, not Trunetto. They can help with warranty claims, device replacements, and advanced technical issues.
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