The ICSP is present in most boards, so you should have no problem flashing firmware without a bootloader that way. Now, you will need the Arduino software to upgrade your 3D printer’s firmware. Arduino IDE can be downloaded from the official website, and if you’re on a Windows PC, you can also install it comfortably…

Users can also manually flash the ROM by downloading the MIUI 8 Recovery/Fastboot ROM package. The recovery ROM is perfect for upgrading the MIUI version directly from the device. Recovery ROMs have a .zip file extension and may be installed via MIUI’s Local Update method. If you’re accustomed to working with a rooted phone, there…