I'm trying to onboard a brand new TP-Link Kasa HS300 (US) smart power strip via CLI without using the Kasa mobile app. The device is Hardware Version 2.0 and uses the KLAP encryption

   protocol.

  What I've done:

  - Factory reset the HS300 (held button 10+ seconds, Wi-Fi LED blinking amber/green)

  - Connected my Mac to the device's AP (TP-LINK_Power Strip_XXXX)

  - Confirmed IP is 192.168.0.100, device at 192.168.0.1 is pingable

  - Port 80 is open, port 9999 is closed (so legacy protocol doesn't work)

  Discovery works fine via python-kasa:

  Device Type:        IOT.SMARTPLUGSWITCH

  Device Model:       HS300(US)

  HW Ver:             2.0

  Factory Default:    True

  Encrypt Type:       KLAP

  Login version:      2

  Owner:              (empty)

  The problem: Authentication always fails when I try to connect:

  kasa --host 192.168.0.1 --username 'myemail mail dot com' --password 'mypassword'

  AuthenticationError: Device response did not match our challenge on ip 192.168.0.1,

  check that your e-mail and password (both case-sensitive) are correct.

  I've confirmed my TP-Link cloud account credentials are correct (can log into kasasmart.com). The device is factory default with no owner.

  I also tried the legacy Python-KasaSmartPowerStrip library (port 9999 direct socket) but HW v2.0 doesn't listen on that port at all.

  My goal: Onboard this HS300 to my Wi-Fi network and control individual outlets, all from the command line — no Kasa app, no phone.

  My setup:

  - macOS (Apple Silicon)

  - Python 3.14

  - python-kasa (latest via pipx)

  - HS300(US) HW v2.0, firmware unknown (can't query it)

  Questions:

  1. Has anyone successfully onboarded an HS300 HW v2.0 via CLI with KLAP?

  2. Is there a way to authenticate with a factory-default KLAP device without a TP-Link cloud account?

  3. Could there be a python-kasa version compatibility issue with KLAP v2 + login version 2?

  4. Any alternative tools or approaches for onboarding KLAP devices from the command line?

  Any help appreciated. Happy to share debug logs.