Hi there! I see you're having a bit of trouble connecting your Wemo Wimps with HomeKit, even though they've worked well together in the past. Let’s work through this together to find a solution.

First, let’s try a few basic troubleshooting steps to re-establish the connection:

1. Check Your HomeKit Setup: Ensure that your Home app on iOS is updated and functioning properly. If you have recently made any changes to your Home app settings, that could affect connectivity.

2. Restart Your Devices: Restart both your iPhone and your Wemo devices. For a Wemo, simply unplug the device, wait about 10 seconds, and then plug it back in.

3. Update the Wemo App: Make sure you've got the latest version of the Wemo app installed. Sometimes, updates include important bug fixes that can resolve connectivity issues.

4. Verify Network Settings: Ensure that both your Wemo devices and your iPhone are connected to the same Wi-Fi network. Sometimes, being on different networks (like dual-band Wi-Fi with 2.4GHz and 5GHz) can create connection issues.

5. Reset the Wemo Device: If the above steps don’t help, you might need to reset your Wemo device to factory settings. For the plug, unplug it, and while it’s unplugged, hold the reset button (if available) and then plug it back in while keeping the button pressed until the light starts blinking amber and white.

6. Check iCloud Settings: Make sure that "iCloud Keychain" and "Home" are enabled under Settings > [your name] > iCloud. This is essential for HomeKit functionality.

If these steps don't work, there may be a need for deeper investigation or additional resources. Here’s a helpful guide for resolving HomeKit no response issues: How to resolve a No Response error in the Apple Home app - Belkin.

Please let me know if any of these steps resolve the issue or if you need further assistance! Are you satisfied with the solution I provided?