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Bootloader downgrade (0.5.x) #1417

merged 1 commit into from Nov 1, 2017


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commented Oct 27, 2017


When downgrading from 0.7.0 to 0.5.x firmware, the bootloader needs to be downgraded along with other system modules (see Release notes). This PR simplifies the procedure by making the system automatically downgrade the bootloader if necessary.

Steps to Test

Flash 0.7.0 firmware binaries (including bootloader) to a device, and ensure that the system can be downgraded to 0.5.x following the regular downgrade procedure.


  • [CH8765]


  • User is totes amazing for contributing!
  • Contributor has signed CLA (Info here)
  • Problem and Solution clearly stated
  • Run unit/integration/application tests on device
  • Added documentation
  • Added to after merging (add links to docs and issues)

@sergeuz sergeuz added the enhancement label Oct 27, 2017

@sergeuz sergeuz requested a review from m-mcgowan Oct 27, 2017

@m-mcgowan m-mcgowan merged commit 8828b7f into release/v0.5.5 Nov 1, 2017

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@m-mcgowan m-mcgowan deleted the feature/bootloader_downgrade_0.5.x branch Nov 1, 2017


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commented Nov 1, 2017


Test bootloader downgrade

[x] - cd firmware/user/src && particle flash <device> . --target 0.7.0-rc.1 to get first released bootloader installed
[x] - wait for SMH to upgrade, and check versions with particle serial inspect . The bootloader should be version 100, and system modules version 200
[x] - perform an app downgrade by flashing tinker particle flash <device> tinker followed by a manual downgrade by flashing system-part2 and system-part1 from the 0.5.5 local release folder
[x] - use particle inspect to verify the bootloader is at version 7 and the system modules at version 23.

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