Please note: There are two different hardware versions of the AT-HDVS-TX-WP which use different firmware. Both firmware files can be found at this link.
To determine what firmware version you need, please turn over your HDVS product and locate the sticker above the serial number. On this sticker, the last three digits represent the firmware the unit was shipped with. If you find that your unit says "052" please see the "Rev" letter in the bottom left corner of the serial number sticker. Letters A-B = 1.xx firmware - Letters C-F = 2.xx firmware
You may also access the firmware version through the HDVS-RX's on-screen menu by going to the information screen.