P100 v2.0 firmware 1.4.3 - Fixed by manually entering IP in Tapo Controller

∙ Home Assistant (Docker on ZimaOS, latest version) ∙ Tapo P100 Hardware v2.0 ∙ Firmware: 1.4.3 Build 251205 Rel.141413 Problem: Had 4x Tapo P100 plugs that could not be added to Home Assistant. TP-Link Smart Home integration discovered the devices by IP but failed to authenticate with error: “Device response did not match our challenge” What I tried that did NOT work: ∙ Built-in TP-Link Smart Home integration ∙ Factory reset of the devices ∙ Third-party compatibility toggle (option not available in this firmware version) ∙ HACS Tapo Controller with auto-discovery What finally worked: 1. Install Tapo Controller via HACS 2. Settings → Devices & Services → Add Integration → Tapo Controller 3. Add each device one by one by manually entering the IP address in the setup form 4. Enter Tapo account email (lowercase) and password All 4 plugs are now working perfectly. Note: Auto-discovery failed, but manual IP entry worked. If you are stuck, try adding devices one by one with manual IP instead of relying on discovery.