February 14, 2020


The latest version is here. And since it’s already there, no reason NOT to use it. Your board should be ready and up to date. Now I can understand the command a little better haha. Here’s how to update the firmware on your 16u2 in a few steps.

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It can be configured in boltloader number of ways and its capabilities depend on the current configuration. How do you know which fuse bit to toggle? Pay somebody else to do this.

I went ahead and used the Atmel dfu bootloader instead since I already had my pro micro setup with the avr programmer earlier today.

USB DFU boot loader for MCUs

You will receive a warning about the DFU signature; Just ignore it. Now your device can be upgraded OTA from the basic application to the upgrade application. The Manufacturer and Product names are automatically pulled from your config. Replied Aug 081: Use the password you login to your Mac with.

To ensure compatibility with the Caterina booyloader, make sure this block is present your rules. I would like to modify the code in such way that I could able to store the OTA image either in slot 0 or Boitloader 1.


Make sure you grab the correct bootloader. I’ve also tried compiling the production version and that also gives me this error below. I was actually doing this on an Iris but, since I was getting this error, I went ahead and tried compiling the Planck’s qmk bootloader.

This is free software; see the source for copying conditions. Slot0 is used to store the GBL headers during this upload process.

If you use iOS, upload the upgrade files to iCloud. As a reference code for this you can use the “SOC – Switched Multiprotocol Joining Device” software example which implements an application level bootloader to populate the slots with upgrade images.

On OSX, right-click or command-click on the Arduino application and select “show package contents” to find this folder. In this case only the user application is upgraded. However you can upload images to any slot with user application using the same OTA protocol.

Use of this site constitutes acceptance of our User Agreement and Privacy Policy. This contains the bootloader and the firmware, so we only have to flash once.


Replace Pro Micro bootloader with QMK DFU : olkb

Create the application you want to upgrade the device to. After the bootloader project is created, the Application Builder automatically opens up. I’ve done this to 5 of my spare PMs, and will do this to the rest of my keyboards soon. You just don’t get any of the fancy stuff!

DFU bootloader for LPCXpresso – Question | Mbed

This definition is optional, and if your keyboard supports multiple bootloaders of. Sorry about my stupidity. However, changing the bootloader requires ISP flashing or some fancy stuff. Reboot into DFU mode can be triggered in a variety of boofloader. Have you tried running make git-submoduleas that may help.


In this example a smartphone will be used for this purpose. The bootloader accepts upgrade images in. Then you can command the bootloader to reboot from slot0 or slot1.