I think I have the 2.28.62 as the bin that was uploaded is holding it in the file:
HDR1?Ì .?7? 0 t ?º ÿÿÿÿ ÿÿ xiaoqiang_version config core 'version'
# ROM ver
option ROM '2.28.62'
# channel
option CHANNEL 'release'
# hardware platform R1AC or R1N etc.
option HARDWARE 'R4A'
# CFE ver
option UBOOT '1.0.2'
# Linux Kernel ver
option LINUX '0.0.1'
# RAMFS ver
option RAMFS '0.0.1'
# SQUASHFS ver
option SQAFS '0.0.1'
# ROOTFS ver
option ROOTFS '0.0.1'
#build time
option BUILDTIME 'Fri, 28 Jun 2019 10:18:46 +0000'
#build timestamp
option BUILDTS '1561717126'
#build git tag
option GTAG 'commit b221a96d2a53f5769fe6aa5165e2a082418a3169'
?º Ì firmware.bin 'V??&ð]ìð mÀ? ??0?à??ÞMIPS OpenWrt Linux-3.10.14
The user @ksc91u claimed it is working with the firmware here, and that you have to be connected by LAN cable to the router to access openWRT. I entered the IP 192.168.1.1 in the browser, but could not connect.
Which version exactly have you flashed?