Hi there! I understand you have two Hubspace transformers, and one of them keeps going offline. Let's work together to get that fixed.

To help me better assist, could you please tell me:
- Is the offline transformer completely losing power, or is it powered but just not connecting reliably to the Hubspace app or your Wi-Fi?
- Have you noticed if this happens at specific times or randomly?
- Is it the same transformer that always goes offline, or does it switch between the two?

In the meantime, here are some initial steps to try for connectivity issues with Hubspace transformers:

1. Check Power & Connections
- Verify the transformer is plugged in properly and that the outlet is supplying power. Sometimes breakers switch off or outlets have issues.
- Check if the reset button on the transformer needs to be pressed — some models have this.

2. Wi-Fi Connectivity
- Hubspace transformers typically connect via 2.4GHz Wi-Fi, so ensure your router’s 2.4GHz band is on and not hidden.
- Make sure the transformer isn’t too far from the Wi-Fi router; distance or obstacles can cause intermittent disconnections.

3. App and Firmware
- Restart the Hubspace app and try reconnecting the transformer.
- Check if there’s a firmware update for the transformer in the app and apply it if available.

4. Reset & Re-Pair
- If the transformer continues to go offline, try resetting it (check your model's manual for reset instructions) and then re-pairing it to the Hubspace app.

If you’ve already tried these, please let me know which steps you’ve done, and I can guide you to some advanced troubleshooting! Also, feel free to share any other symptoms or error messages you see.

Would you like me to walk you through any of these steps in detail?