AC-EX40-444-R Firmware Update Version V2.20
Newest firmware for the AC-EX40-444-R:
Main MCU Ver 2.20
- Improved compatibility with HDCP 2.X devices
- Resolved Issue with Newer AVR Boards outputting Invalid Audio Streams
Requirements:
- Windows PC
- USB-A to Micro-USB data cable for direct serial connection
- Firmware FWM file and Uploader (see attachments at the bottom of this page)
- Windows PC
- USB-A to Micro-USB data cable for direct serial connection
- Firmware FWM file and Uploader (see attachments at the bottom of this page)
- CH340 USB Serial Driver (direct download link here)
- The external 48V .5A Power Supply
1. Connect your PC directly to the Micro-USB POWER / CTRL port on the AC-EX40-444-R using a USB A to Micro-USB cable. Download and install the CH340 USB Serial Driver onto your PC using the link above.
2. Right-click on the Windows Start button and select Device Manager.
Then select the Ports (COM & LPT) drop-down menu and locate the port labeled USB-SERIAL CH340 (COMx) to confirm the EX40-444-R is connected to the PC.
3. Open the Firmware Uploader V1.25.
Select the correct COM, Baud: 57600, and select the Open button 
to open the port.
The Status will now show as Connected in green text with COMx connect success under Messages.
4. Select the Get Version button to see the current firmware version on the AC-EX40-444-R (note: screenshot below is only an example and may not display the exact version).
5. Select the file button 
to load the firmware file. Make sure to select the correct firmware file for the device you are currently updating.
The firmware file will be loaded into the Open Firmware file field with the following information under Messages:
6. Select the Upgrade button to start the firmware update. The loading bar will pause at 99% for a few seconds before automatically rebooting the unit. Do not use the ForceUpgrade button. If the Uploader is not updating firmware for any reason, please contact AVPro Edge Tech Support to assist in troubleshooting your AC-EX40-444-R.
7. Once the loading bar reaches 100%, use the Get Version button again to ensure the new firmware version is correct (note: screenshot below is only an example and may not display the exact version).
8. Select the Close button 
to close the port, then select the X at the top to exit the Uploader. The AC-EX40-444-R is now up to date on its firmware and is safe to disconnect from your PC and power.
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