The V4.02.R11 firmware (often searched as v402r11 or v403r11) is a common platform version for H.264 and H.265 digital and network video recorders (DVR/NVR) manufactured by Hangzhou Xiongmai Technology Co. (often labeled as XM or XMeye). Firmware Overview
Hot Work Coordination: Check the site’s Hot Work Permit log. Ensure that no spark-producing activities are scheduled during the 15-to-30-minute window required for the firmware flash and system reboot. v403r11 h264 h265 dvr nvr firmware download hot work
Access System Info: On your recorder, navigate to [Main Menu] > [System info] > [Version]. The V4
Downloading V403R11 H.264 H.265 DVR/NVR Firmware Hikvision (OEM boards) Dahua (OEM) Generic Chinese DVRs
You can download the firmware package using the link below. This is a host site frequently used for these specific embedded Linux DVR systems.