Skip to content

Firmware 0.8.0-rc.12 Pre-release for Core/Photon/P1/Electron

released on December 20th, 2018 🎅 🤶

📝 Please read all notes in the Notes Festival 🎉 below

Note: This is a release candidate for 0.8.0 default so please do test on your systems.

Note: This is a pre-release and is not intended for production yet. We've tested this pre-release to the best of our ability and we want to know what you think now! Please understand that some care and attention is necessary when testing this pre-release, and be sure to upgrade to the final release when it's available. It will not be available by default. To use you must select the version dropdown from the devices drawer. Downgrading back to the current release info is at the bottom of this post.

Note: OTA or YModem transfer on Electron (sequence required)

  1. First Update to 0.5.5 (if the current version is less than that)
  2. Then update to 0.6.4 (if the current version is less than that)
  3. Then update to 0.7.0 (if the current version is less than that)
  4. Then update to 0.8.0-rc.12

Note: DFU over USB on Electron/Photon/P1 (sequence not required)

  • You may update to 0.8.0-rc.12 directly first, flash the system firmware (attached above) in order 1,2(,3) to the device using particle flash --usb <system-part.bin>. See the next note about the bootloader if you are offline!

Note: P1/Photon Bootloader
The Cloud will automatically update the bootloader on P1/Photon devices if your device is online. If your device does not connect to the cloud and it is offline, you should flash the bootloader to the device using particle flash --serial <bootloader.bin>. This should be done after upgrading system firmware. The Electron bootloader is applied automatically from it's own system parts.

Note: Downgrading [Electron/Photon/P1] OTA or YModem transfer:
If you need to downgrade, you must downgrade to 0.7.0 and then 0.6.3(Photon/P1), 0.6.4(Electron) to ensure that the bootloader downgrades automatically. When downgrading to older versions, downgrade to 0.7.0 first, then 0.6.3(Photon/P1), 0.6.4(Electron), then to an older version such as 0.5.5.



  • [Electron/Photon/P1] Cache persistent feature flags (#1640)
  • [Photon/P1] Memory usage optimizations (#1635)


  • [Electron/Photon/P1] Fixes SOS in 0.8.0-rc.11 and also ensures button and OOM events are handled synchronously. Previously in multi-threaded applications the button handling may have been delayed to run within the application thread. Now it is always handled immediately and should be noted that it is called from an ISR, so it is not advised to dynamically allocate memory in button event handlers. (#1600) (#1650)
  • [Electron/Photon/P1] Do not disable interrupts on every system loop iteration (#1622)
  • [Electron/Photon/P1] Wait for Wiring Thread to start (#1528)
  • [Electron/LTE] Power Manager Watchdog Timer Fix (#1581)
  • [Electron/LTE] AT+CNUM command causing registration failure on LTE devices (#1627)
  • [Electron] PMIC::getInputCurrentLimit() cannot report values higher than 900mA (#1581)
  • [Electron] Do not set the sticky skip hello after handshake (#1624)
  • [Photon/P1] Invalidate sockets when turning WiFi off (#1639)

System Binaries (all devices)

located above

Programming and Debugging

You can view specific programming and debugging notes for this version of firmware here.

QA Report Summary for Particle Device OS

You can view results of tests run this release here.

Assets 17
You can’t perform that action at this time.