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Fixes SoftDevice OTA updates #1897

merged 3 commits into from Aug 29, 2019


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commented Aug 29, 2019


  1. The bootloader doesn't correctly handle MODULE_INFO_FLAG_DROP_MODULE_INFO flag. The returned module info for the SoftDevice module is a copy into a static variable, so direct pointer comparisons can't work.
  2. The state checksum doesn't change after an update of either SoftDevice or NCP module, which causes the device to get stuck in safe mode


  1. Use memcmp() instead
  2. Add a dummy suffix structure to module info and fill SHA for NCP and SoftDevice modules

This should probably be backported into 1.3.0 default

Steps to Test

  1. Flash the bootloader and then flash the SoftDevice binary OTA. It should apply correctly.
  2. TBD on staging.

Example App





  • 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)
avtolstoy added 3 commits Aug 29, 2019
[gen3] radio stack: return radio stack module info should include a s…
…uffix with a 'unique' SHA in order for OTA upgrade to work correctly
[gen3] ncp: returned NCP module info should include a suffix with a '…
…unique' SHA in order for OTA upgrade to work correctly

@avtolstoy avtolstoy added the bug label Aug 29, 2019

@avtolstoy avtolstoy added this to the 1.4.0-rc.1 milestone Aug 29, 2019

@avtolstoy avtolstoy requested review from m-mcgowan, sergeuz and XuGuohui Aug 29, 2019

@avtolstoy avtolstoy removed request for sergeuz and m-mcgowan Aug 29, 2019

@avtolstoy avtolstoy merged commit 3af8b3b into develop Aug 29, 2019

2 checks passed

Codacy/PR Quality Review Up to standards. A positive pull request.
continuous-integration/travis-ci/pr The Travis CI build passed

@avtolstoy avtolstoy deleted the fix/softdevice-ota branch Aug 29, 2019

@avtolstoy avtolstoy referenced this pull request Sep 5, 2019
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