If the device is functioning, extract the firmware using a (e.g., Segger J-Link, FTDI 2232H). This gives you a backup before any update.
Updates can improve the precision of the square wave or sine wave output to ensure connected sensitive appliances run smoothly. lddh350aa75 firmware link
sudo dmidecode -s system-manufacturer sudo lshw -class firmware cat /proc/device-tree/model # For ARM embedded devices If the device is functioning, extract the firmware