Opentrons

Version 4.5.0 of the Opentrons App and OT-2 Software is focused on quality-of-life improvements and fixes.

[Technical change log](https://github.com/Opentrons/opentrons/blob/edge/CHANGELOG.md#450-2021-08-03)

Opentrons App

New Features

- Protocol uploads have been made substantially faster! (See OT-2 section below for more details.)

Bug Fixes

- Fixed issues with the run timer reading `00:00` in the middle of a paused protocol ([7740][])

[7740]: https://github.com/Opentrons/opentrons/issues/7740

OT-2 Software

New Features

- The OT-2 now uses a faster analysis method on protocol upload
- Thanks to everyone who beta tested this feature over the last few months!
- You may revert to the old analysis method with the **Use Older Protocol Analysis Method** in your OT-2's advanced settings
- If you encounter any issues (e.g. protocol run errors not caught during upload) please reach out to Opentrons Support or [open an issue][] in GitHub so we can continue to improve this feature

Bug Fixes

- Fixed a regression that prevented use of OT-2 Modules in Jupyter notebook ([8009][])
- Fixed an uncaught import error on macOS and Windows ([8154][], thanks to [Maksim Rakitin][] for the fix!)
- Fixed a crash caused by invalid calibration data ([7962][])

Known Issues

In 4.5.0 and previous releases, the OT-2 will only use TLS 1.0 for WPA2 Enterprise association. Some RADIUS servers have disabled this version of TLS; it must be enabled to connect the OT-2 to a RADIUS-secured network.

[7962]: https://github.com/Opentrons/opentrons/issues/7962
[8009]: https://github.com/Opentrons/opentrons/issues/8009
[8154]: https://github.com/Opentrons/opentrons/issues/8154
[maksim rakitin]: https://github.com/mrakitin
[open an issue]: https://github.com/Opentrons/opentrons/issues

Version 4.4.0 of the Opentrons App and OT-2 Software is a release focused on stability and behind-the-scenes improvements to our software.

[Technical change log](https://github.com/Opentrons/opentrons/blob/edge/CHANGELOG.md#440-2021-06-16)

Opentrons App

This is a quiet release on the app front as we make some behind-the-scenes improvements to how the app is built, so we don't have any changes to report here.

OT-2 Software

New Features

- Triggering a `move_to` to a labware will now count the labware as "used" in the protocol, allowing it to show up in the calibration list ([7812][])
- Various documentation and error message improvements

Bug Fixes

- A new Protocol API version was added - `2.11` - to ensure that liquid handling commands like `aspirate` and `dispense` will rejected if the source or destination labware is a tip rack (thanks to [andeecode] for reporting [7552][]!)
- The robot's built-in HTTP server now sends the correct headers for CORS (thanks to [Benedict Diederich][] for reporting [7599][]!)
- Added guards to prevent resumptions from a delay overriding higher priority pauses ([7773][])
- Fixed several memory leaks in module handling that could lead to spurious error logs and other issues ([7641][] and [7690][])

Known Issues

In 4.4.0 and previous releases, the OT-2 will only use TLS 1.0 for WPA2 Enterprise association. Some RADIUS servers have disabled this version of TLS; it must be enabled to connect the OT-2 to a RADIUS-secured network.

[andeecode]: https://github.com/andeecode
[benedict diederich]: https://github.com/beniroquai
[7552]: https://github.com/Opentrons/opentrons/issues/7552
[7599]: https://github.com/Opentrons/opentrons/issues/7599
[7641]: https://github.com/Opentrons/opentrons/issues/7641
[7690]: https://github.com/Opentrons/opentrons/issues/7690
[7773]: https://github.com/Opentrons/opentrons/issues/7773
[7812]: https://github.com/Opentrons/opentrons/issues/7812

Version 4.3.1 of the Opentrons App and OT-2 Software brings a major new feature: the ability to use multiple modules of the same type in a protocol. For instance, you can use two Opentrons Temperature modules in a protocol at the same time. There are also several bug fixes.

[Technical change log](https://github.com/Opentrons/opentrons/blob/edge/CHANGELOG.md#431-2021-05-10)

Opentrons App

New Features

- Support for 2 Temperature Modules or 2 Magnetic Modules
- The USB port to which each module is attached is now displayed in the protocol info screen

Bugfixes

- Fix an issue where robots would sometimes not reappear after an update when connected via USB ([7608](https://github.com/Opentrons/opentrons/issues/7608))

OT-2 Software

New Features

- The OT-2 now supports the use of two Magnetic Modules or two Temperature Modules in the same Python API protocol. See our Help Center article on [using modules of the same type](https://support.opentrons.com/en/articles/5167312-using-modules-of-the-same-type-on-the-ot-2) for an overview of how this feature should be configured.
- New API level: 2.10. This API level contains a bugfix for an issue where pipettes would move diagonally when accessing the same well one after another ([7156](https://github.com/Opentrons/opentrons/issues/7156)). The fix is only applied when API Level 2.10 is requested in a protocol to avoid changing the behavior of existing protocols.

Bugfixes

- Fixes an issue causing slow protocol uploads in protocols using Thermocycler Modules or Temperature Modules ([7506](https://github.com/Opentrons/opentrons/issues/7506))
- Fixes an issue where labware could not have a 0 column. You can now once again create custom labware with a column 0 ([7531](https://github.com/Opentrons/opentrons/issues/7531))
- Fixes an issue where tip length calibration would not be applied during labware calibration, so calibrating labware would cause incorrect movement during protocol runes ([7765](https://github.com/Opentrons/opentrons/issues/7765))

Known Issues

In 4.3.0 and previous releases, the OT-2 will only use TLS 1.0 for WPA2 Enterprise association. Some RADIUS servers have disabled this version of TLS; it must be enabled to connect the OT-2 to a RADIUS-secured network.

Version 4.3.0 was not released publicly. Most people should use [a newer release](https://github.com/Opentrons/opentrons/releases) instead.

v4.3.0 was released on 2021-05-06 for our factory to use to provision new OT-2 Refresh robots.

v4.3.0-rtcfix is a special release made much later, on 2022-08-09. It resolves provisioning problems at the factory. It's identical to v4.3.0, except that it uses [v1.7.1 of our robot OS instead of v1.7.0](https://github.com/Opentrons/buildroot/releases/tag/v1.7.0).

Version 4.2.0 of the OT-2 and Opentrons App software.

Opentrons App

- Separated the "Pipettes and Modules" page into two separate pages
- Added in a missing prompt to use a calibration block during certain tip-length calibrations
- Removed auto-resume behavior when clicking "Back" from the protocol run cancellation confirmation alert

OT-2 Software and OS

- Upgraded to a newer version of `wpa_supplicant` to resolve connectivity issues with certain 802.1X networks
- Please note that the OT-2 still cannot connect to 802.1X networks that _require_ TLS v1.2; we're working on it
- Added a fix for incorrect pipette offset data causing differences in pipettes' Z-positioning
- Fixed pipettes not lowering enough during the "Change Pipette" flow
- Fixed a variety of bugs in how pipette settings are saved that could cause invalid configuration data

Please see the following for more information!

- [Technical change log][]

[technical change log]: https://github.com/Opentrons/opentrons/blob/edge/CHANGELOG.md#420-2021-03-18

Version 4.0.0 of the OT-2 and Opentrons App software.

This is a major release with a _massive_ overhaul of the calibration experience, along with several breaking changes. The largest breaking change is that this release **drops support for Python Protocol API v1**. Please see the following links for more information!

- [Blog post][]
- [Migrating to Protocol API v2][]
- [Technical change log][]

[blog post]: https://blog.opentrons.com/november-2020/
[migrating to protocol api v2]: https://support.opentrons.com/en/articles/3425727-switching-your-protocols-from-api-version-1-to-version-2
[technical change log]: https://github.com/Opentrons/opentrons/blob/edge/CHANGELOG.md#400-2020-11-20