How to find the hardware version on a TP-Link device
EAP660 HD(EU)_V1_1.6.3 Build 20251113
Minimum FW Version for Update: 1.6.2 Build 20250908 Rel. 78163. This firmware upgrade is irreversible. Contact Omada technical support if downgrade is required.

Release Note
Version Info:
1. Minimum FW Version for Update: 1.6.2 Build 20250908 Rel. 78163.
2. This firmware upgrade is irreversible. Contact Omada technical support if downgrade is required.
3. Recommended Omada Controller version 6.1 or above.
4. For downloading of any firmware version, please refer to Omada Download Center.
Enhancements:
1. Encrypted the firmware and optimized the algorithm to enhance the overall
security of the firmware.
Bug Fixed:
1. Fixed an issue where DFS channel switching occurred too frequently.
2. Fixed an issue where clients might disconnect or fail to connect.
3. Fixed an issue where hostapd abnormalities caused memory usage to increase.
Notes:
1. This version of firmware is applied to the Omada APP v5.1 or above.