Dear @Eodio,

I know that the A10 can be set with band steering, as well as the EAP225-Outdoor. Can I get seamless hand-off roaming between the A10 and the EAP-225? Or do I need to install another EAP-225 in my office and disable the Wi-Fi on the A10? 

The EAP225 Outdoor supports Fast Roaming feature based on 802.11k/v, which allows clients to select the AP with the best signal (in case there are more than one APs) under a common WLAN name. However, either the Smart Connect feature on the home router A10 or the Band Steering feature on the business EAPs is for seamless roaming. A similar post is discussed in this post.

Do I get the same results if I use your software on a computer instead of the OC200?

Yes. They are the same.

Since you have purchased the EAP225-Outdoor, you may refer to the QIG to set it up and check if it works for your situation. A similar discussion in this post. So no need to enable the Fast Roaming feature with the Omada Controller, but simply configure the EAP225-Outdoor with the same SSID, the same encryption type (like WPA2-PSK/AES) and the same PSK/wireless password as the A10 router.

Here are the related FAQs for your reference.

What is Fast Roaming of TP-Link Business Wi-Fi Products: https://www.tp-link.com/support/faq/2097/

Fast Roaming Keeps Connection Consistent: https://community.tp-link.com/en/business/kb/detail/322