Sites like XDA Developers or 4PDA frequently have threads dedicated to generic HDMI dongles where users upload tested .bin files.
HCCast Version 190529: How to Download and Use This Wireless Display Firmware hccast version 190529 free
If the 190529 version is available on the server, the device will prompt you to "Upgrade." Click it and wait for the progress bar on the TV to reach 100%. Sites like XDA Developers or 4PDA frequently have
Includes screen rotation and full-screen modes to fit different monitors. hccast version 190529 free