# Announcing the Q2 2021 Developer Firmware Release **URL:** \ **Category:** Firmware\ **Tags:** firmware-release\ **Created:** [May 27, 2021, 8:55pm UTC](https://discuss.blues.com/t/announcing-the-q2-2021-developer-firmware-release/276 "2021-05-27T20:55:23Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![bsatrom](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/bsatrom/32/3_2.png) [@bsatrom](https://discuss.blues.com/u/bsatrom)\ **Post date:** [May 27, 2021, 8:55pm UTC](https://discuss.blues.com/t/announcing-the-q2-2021-developer-firmware-release/276/1 "2021-05-27T20:55:23Z")
Hello everyone! It’s time for another developer firmware release! We’ve cut a new developer version of the Notecard firmware (1.5.5) and it is now available for installation through Notehub DFU, or in manual “offline” mode. Read on for a summary of fixes and features, and for installation instructions. ## Notecard v1.5.5 Release Notes The following items have been added since Notecard v1.5.3. 1. Enhancements to support Notecard-related features in the [Airnote](https://blues.io/products/airnote) product. 2. Added support for end-to-end encryption of Notes through Notehub. 3. Add GNSS Horizontal dilution of precision (HDOP) support, including waiting for location to converge to configured HDOP before recording `_track.qo` notes, and adding the HDOP to the `_track.qo` body. 4. If [`sync:true` is specified](https://dev.blues.io/reference/complete-api-reference/card-requests/#card-location-track) in `card.location.track`, an immediate sync occurs every time a track note is added. 5. [`card.version` now accepts a field `api:`](https://dev.blues.io/reference/complete-api-reference/card-requests/#card-version) that defines, for compatibility purposes, the major version number of the notecard firmware that the host was developed to use. In the response, `api` returns the current firmware’s version number. 6. Added `_tri_gps_failure` environment variable as a triangulation configuration option for Notecard to first try GPS then fallback to using cellular triangulation if it is unable to make a GPS fix. 7. Fix to improve the accuracy of `card.voltage` readings. 8. Corrected behavior of heartbeat reporting in `card.location.track`. 9. Miscellaneous bug fixes and improvements to MCU/SBC host reliability, continuous mode operation, and external SIM support. ## Installation Instructions Every Notecard sold since December 7, 2020 comes pre-installed with v1.5.2. We recommend updating the firmware on all devices running `1.5.2` and `1.5.3`. There are two ways to update your Notecard firmware: 1. With an over-the-air DFU from [Notehub.io](http://notehub.io/). This process is the simplest way to get the new firmware on your device, and is documented [here](https://dev.blues.io/operate/notehub-walkthrough/#manage-notecard-firmware). _Please be aware that this approach does use data in your data plan._ 2. By performing a manual flash over USB with a terminal program and the STM32CubeProgrammer toolchain. See [here](https://discuss.blues.com/t/manually-update-notecard-firmware/147) for step-by-step instructions for this approach and download the 1.5.5 Release binary here: [notecard-1.5.5.13080.bin.zip](https://discuss.blues.com/uploads/short-url/y6pFNTbq0P8cCYdt5HKfcaXwRCU.zip) (509.0 KB) . Feel free to ping us here if you have any questions, and good luck with your Notecard projects! ---
**Author:** ![bsatrom](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/bsatrom/32/3_2.png) [@bsatrom](https://discuss.blues.com/u/bsatrom)\ **Post date:** [June 3, 2021, 10:07pm UTC](https://discuss.blues.com/t/announcing-the-q2-2021-developer-firmware-release/276/2 "2021-06-03T22:07:33Z")
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**Author:** ![bsatrom](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/bsatrom/32/3_2.png) [@bsatrom](https://discuss.blues.com/u/bsatrom)\ **Post date:** [June 3, 2021, 10:08pm UTC](https://discuss.blues.com/t/announcing-the-q2-2021-developer-firmware-release/276/5 "2021-06-03T22:08:29Z")