On the stock SD card, you can find the BIOS files under RetroArch >. You can simply copy/paste the files from your stock SD card, or add your own. In the BIOS folder, add your BIOS file collection. Once you have run the Onion Installer, you can now shut down the device, eject the microSD card, and add your files to it. Start up the device and it will run the installer. Eject the SD card and place it in your Miyoo Mini.If you don’t see the folder, follow the instructions in the next section about enabling hidden files. Drag this folder into your freshly-formatted FAT32 microSD card. Unzip the file, and you should have a single folder, and inside will be a subfolder named “.tmp_update”.Head over to the Onion GitHub Releases page and grab the latest release (it will be a zip file).If you have a Mac, “Erase” the disk using the Mac’s built-in Disk Utility app, with the format MS-DOS (FAT), name it whatever you want.If using Windows, use the guiformat tool to format the card to FAT32.
Format your microSD card to FAT32 file system.If you are having issues upgrading your device, or it gets caught in a loading screen while flashing the new firmware, follow the instructions provided in this Reddit comment. Their process is a bit different, in that they move the “TF card” files to the SD card after the upgrade either method works fine. Here is a fancy infographic (credit: PIXELSHIFT and TNGLIKER) that walks you through the process. Plug the SD card into your computer and delete the miyoo283_fw.img file before doing anything else.Unplug the device from the cable and remove the SD card. The device will restart and will then display a battery image and the charging screen.The Miyoo Mini will automatically power on and run the update.For best results, use a USB-A to USB-C cable, and a “smart” plug that can adjust wattage, or one of those cheap 5V/1A plugs that used to come with cell phones. Plug the Mini into a wall charger, and be sure to use use a low-wattage wall plug.
Sonic charge alternate firmware update#
In order to use the most recent version of OnionOS, you must first update the Miyoo Mini base firmware to the April 2022 version.
Sonic charge alternate firmware how to#
Also in the video above I discuss some of the color options available, as well as how to fix light bleed on the transparent models.
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