I want to upgrade our pretty old sample of terminal adapter:
Product Model: HT-503 V1.1B
Software Version: Program-- 22.214.171.124 Bootloader-- 126.96.36.199 Core-- 188.8.131.52 Base-- 184.108.40.206.
I tried on different way with actual 220.127.116.11, but without success.
Please advice or help to break trough upgrade procedure successfuly.