Ok, so you flashed a binary for an HT-TM02 on an HT-TM01??
I would very carefully read https://github.com/wingspinner/HooToo-Tripmate-HT-TM02-OpenWRT and hope that you've still got that stick
Useful links: OpenWRT main page http://openwrt.org OpenWRT wiki http://wiki.openwrt.org HT-TM02 thread https://forum.openwrt.org/viewtopic.php?id=53014
The TM02 with the factory software doesn't have enough RAM to untar/ungzip and assemble the complete TM02 flash MTD image for the upgrade so it requires a USB flash stick to use as workspace. So does the new loader. Having a clean USB flash stick plugged in is required.
The first thing the loader does is shutdown various services that might interfere with the flashing process and perhaps free up some RAM. Then it creates a complete backup of the factory flash MTD device written to your USB flash stick. It copys the entire TM02 MTD device as one file as well as each partition seperately to seperate files. The files are named appropriately and will be under the "HT_FLASH" directory on the stick. You can use this to revert back to factory if you wish. I'll writeup some instructions later for this.
(No wonder the PR wasn't accepted -- this device is apparently even worse than most https://openwrt.org/supported_devices/432_warning)