http://docs-dev.bitswrt.com/devops_build/NHX-QSDK-11.5/NHX6018-0-N32-256M16-D4/usb-device/d33df0ff9b49b4702a5fda98b29ebc8eebf48a9b/NHX6018-0-N32-256M16-D4/openwrt-ipq-ipq60xx-NHX6018-0-N32-256M16-D4-sysupgrade.bin