Upgrading FIIO BTR3 Firmware - for Ubuntu/macOS
BTR3 might be the most popular one of FIIO's bluetooth DAC/amp series. It
supports all bluetooth CODECs and can work as a USB DAC. One thing I like very
much is that I can use it while charging it (via USB type C port). However, when
I wanted to upgrade its firmware to version 1.2 (mainly for "8. Improved the
alert sounds and reduced the volume level"), I found myself (as many others) was
stuck because FIIO only provides an upgrade tool for Windows. Actually, it can
be very easily done using
dfu-util (and a live Ubuntu USB stick if you are
macOS users need a live Ubuntu USB stick because all my attempts of upgrading
the firmware with
dfu-util + macOS failed with the following error:
$ sudo dfu-util -D BTR3-1.2-0531.dfu dfu-util 0.10 Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc. Copyright 2010-2020 Tormod Volden and Stefan Schmidt This program is Free Software and has ABSOLUTELY NO WARRANTY Please report bugs to http://sourceforge.net/p/dfu-util/tickets/ Opening DFU capable USB device... ID 0a12:ffff Run-time device DFU version 0101 Claiming USB DFU Runtime Interface... Determining device status: state = appIDLE, status = 0 Device really in Runtime Mode, send DFU detach request... Resetting USB... dfu-util: error resetting after detach: LIBUSB_ERROR_NO_DEVICE
After some research, it appears to me an issue of
libusb in macOS. Therefore,
I need a Linux box. To me, rebooting the MacBook from a live Ubuntu USB drive is
the simplest approach to get a Linux environment.
Below is how I managed to upgrade the firmware for my BTR3:
- Firstly, Create a bootable USB stick on macOS and reboot the MacBook into Ubuntu.
- In Ubuntu, build the dfu-util from source (or install the package using
- Put BTR3 into DFU mode and connect it to the MacBook.
Verify that the device is recognised by
Optional: backup the current firmware from the device.
Write the new firmware to the device.
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