Upgrading HT-TM05 to 21.02.0

Has anyone had any success upgrading an HT-TM05 to the latest 21.02 version? 19 is running ok, but when I try to upgrade I always get:

The uploaded image file does not contain a supported format. Make sure that you choose the generic image format for your platform.

The checksums check out, not sure what else to do.

(post deleted by author)

I'm trying to get the TM05 wiki updated, but you have to use the TFTP method except there are two files now.

  • Download the Kernel-SQUASHFS binary and rename to kernel (no extension)
  • Download the rootfs binary and rename to rootfs (no extension)

The TM05 will first get the kernel file and then the rootfs file and install them. It takes awhile but eventually it will reboot itself and OpenWRT will be available on the ethernet port at