25.9.12rc1

bump rc version

25.9.12rc0

Upcoming

• Experiment profile editing in the UI has a new "search" feature to find available capabilities.
• Experiment Overview page no long "hides" chart data for very old experiments. Now it will always select (up to) 720 data points for each line, regardless of the length of the experiment. For larger cluster, this might result in a slower load time - let me know!
• Initial support for eye-spy optics system.
• Export option under Inventory page to export the Pioreactors ~/.pioreactor folder. Likewise on the leader.
• New "sleep" option can be used in pio run pumps ... to wait between pump actions.
• "Advanced" menu in the UI to modify configuration temporarily when starting a job - now available for automations.

Bug fixes

• real time charts in the UI again!
• dataset exports have a corrected timestamp on the folders
• remove instances of double logging from the ui
• fix MCP not respecting "notifications" methods.
• fix not being able to select a model when add a Pioreactor worker from the Inventory page.

Breaking changes

• Turbidostat now forces duration=0.25s for frequent checks. This was always the case when run from the UI.

25.9.11rc0

Upcoming

• Experiment profile editing in the UI has a new "search" feature to find available capabilities.
• Experiment Overview page no long "hides" chart data for very old experiments. Now it will always select (up to) 720 data points for each line, regardless of the length of the experiment. For larger cluster, this might result in a slower load time - let me know!
• Initial support for eye-spy optics system.
• Export option under Inventory page to export the Pioreactors ~/.pioreactor folder. Likewise on the leader.
• New "sleep" option can be used in pio run pumps ... to wait between pump actions.
• "Advanced" menu in the UI to modify configuration temporarily when starting a job - now available for automations.

Bug fixes

• real time charts in the UI again!
• dataset exports have a corrected timestamp on the folders
• remove instances of double logging from the ui
• fix MCP not respecting "notifications" methods.
• fix not being able to select a model when add a Pioreactor worker from the Inventory page.

Breaking changes

• Turbidostat now forces duration=0.25s for frequent checks. This was always the case when run from the UI.

25.8.14

25.8.14

Highlights

• Custom Bioreactor Models
  Our community has been incredibly creative in adapting Pioreactor hardware and software for different vessel types. Now, you can officially add your own custom bioreactor models to the Pioreactor software!
  Place your model definitions as yaml files in the new .pioreactor/models/ directory. For example:

  model_name: custom_100ml
  model_version: "1.0"
  display_name: "Custom 100 mL, v1.0"
  reactor_capacity_ml: 100.0
  reactor_max_fill_volume_ml: 95.0
  reactor_diameter_mm: 50.0
  max_temp_to_reduce_heating: 80.0
  max_temp_to_disable_heating: 85.0
  max_temp_to_shutdown: 90.0

  Example file name: custom_100ml.yaml

  This information is used throughout the software (including the UI) to support different shapes, sizes, and safety limits. Tell us what else you’d like supported!

• New MCP Server (Experimental)
  You can now run an MCP server alongside your leader’s web server. It adds a new SSE-based endpoint at:

  http://<leader-address>/mcp/
  

  This exposes some Pioreactor tools in real time. It’s still experimental — your feedback and suggestions for additional tools/resources are welcome!

Enhancements

• Added Time Range filter to the Export Data UI page.

• The “Add a new Pioreactor worker” dialog now automatically scans for and lists local workers available to join your cluster.

• New config.ini option:

  [od_reading.config]
  duration_between_led_off_and_od_reading = <seconds>
  

  This adjusts the pause between turning off LEDs and taking an OD snapshot.

• pios X --experiments <experiment> now lets you target workers by experiment from the leader CLI.

• More CLI options are available for jobs with settable: True published_settings.

• New API endpoints:

  • /unit_api/capabilities
  • /api/units/<pioreactor_name>/capabilities
    These provide detailed information about what each Pioreactor can run.

Breaking changes

• API changes:

  • api/units/<unit>/configuration response format updated.

  • Settings endpoint now scoped to experiments:

    /api/workers/unit1/jobs/settings/job_name/stirring/experiments/<exp>
    

  • Removed: /api/workers/jobs/stop/experiments/<exp>
    Use: /api/workers/$broadcast/jobs/stop/experiments/<exp>

  • Removed: /api/experiments/<experiment>/jobs/settings/job_name/<job_name>
    Use: /workers/$broadcast/jobs/settings/job_name/<job_name>/experiments/<experiment>

• pio logs no longer follows by default — use -f to follow.

• Developers: We’ve merged our three main repositories (pioreactor, pioreactorui, pioreactorui_frontend) into a single monorepo: pioreactor. The old repos will be archived, and update code in pio.py will now point to the new repo. If you have branches on the old repos, rebase onto pioreactor. Discussion: GitHub issue #576.

Bug fixes

• Fixed default sorting when exporting CSV.
• Fixed crash in UI profile editor.
• Fixed pumps not shutting down correctly if active when dosing_automation stopped.
• Fixed cleanup issue in growth rate calculation.
• Fixed plugins page crashing when a plugin doesn't have a homepage associated to it.

25.8.13rc0

Upcoming

Highlights

• Custom Bioreactor Models
  Our community has been incredibly creative in adapting Pioreactor hardware and software for different vessel types. Now, you can officially add your own custom bioreactor models to the Pioreactor software!
  Place your model definitions in the new .pioreactor/models/ directory. For example:

  model_name: custom_100ml
  model_version: "1.0"
  display_name: "Custom 100 mL, v1.0"
  reactor_capacity_ml: 100.0
  reactor_max_fill_volume_ml: 95.0
  reactor_diameter_mm: 50.0
  max_temp_to_reduce_heating: 80.0
  max_temp_to_disable_heating: 85.0
  max_temp_to_shutdown: 90.0

  This information is used throughout the software (including the UI) to support different shapes, sizes, and safety limits. Tell us what else you’d like supported!

• New MCP Server (Experimental)
  You can now run an MCP server alongside your leader’s web server. It adds a new SSE-based endpoint at:

  http://<leader-address>/mcp/
  

  This exposes some Pioreactor tools in real time. It’s still experimental — your feedback and suggestions for additional tools/resources are welcome!

Enhancements

• Added Time Range filter to the Export Data UI page.

• The “Add a new Pioreactor worker” dialog now automatically scans for and lists local workers available to join your cluster.

• New config.ini option:

  [od_reading.config]
  duration_between_led_off_and_od_reading = <seconds>
  

  This adjusts the pause between turning off LEDs and taking an OD snapshot.

• pios X --experiments <experiment> now lets you target workers by experiment from the leader CLI.

• More CLI options are available for jobs with settable: True published_settings.

• New API endpoints:

  • /unit_api/capabilities
  • /api/units/<pioreactor_name>/capabilities
    These provide detailed information about what each Pioreactor can run.

Breaking changes

• API changes:

  • api/units/<unit>/configuration response format updated.

  • Stirring settings endpoint now scoped to experiments:

    /api/workers/unit1/jobs/settings/job_name/stirring/experiments/<exp>
    

  • Removed: /api/workers/jobs/stop/experiments/<exp>
    Use: /api/workers/$broadcast/jobs/stop/experiments/<exp>

  • Removed: /api/experiments/<experiment>/jobs/settings/job_name/<job_name>
    Use: /workers/$broadcast/jobs/settings/job_name/<job_name>/experiments/<experiment>

• pio logs no longer follows by default — use -f to follow.

• Developers: We’ve merged our three main repositories (pioreactor, pioreactorui, pioreactorui_frontend) into a single monorepo: pioreactor. The old repos will be archived, and update code in pio.py will now point to the new repo. If you have branches on the old repos, rebase onto pioreactor. Discussion: GitHub issue #576.

Bug fixes

• Fixed default sorting when exporting CSV.
• Fixed crash in UI profile editor.
• Fixed pumps not shutting down correctly if active when dosing_automation stopped.
• Fixed cleanup issue in growth rate calculation.

25.8.12rc0

Upcoming

Highlights

• Custom Bioreactor Models
  Our community has been incredibly creative in adapting Pioreactor hardware and software for different vessel types. Now, you can officially add your own custom bioreactor models to the Pioreactor software!
  Place your model definitions in the new .pioreactor/models/ directory. For example:

  model_name: custom_100ml
  model_version: "1.0"
  display_name: "Custom 100 mL, v1.0"
  reactor_capacity_ml: 100.0
  reactor_max_fill_volume_ml: 95.0
  reactor_diameter_mm: 50.0
  max_temp_to_reduce_heating: 80.0
  max_temp_to_disable_heating: 85.0
  max_temp_to_shutdown: 90.0

  This information is used throughout the software (including the UI) to support different shapes, sizes, and safety limits. Tell us what else you’d like supported!

• New MCP Server (Experimental)
  You can now run an MCP server alongside your leader’s web server. It adds a new SSE-based endpoint at:

  http://<leader-address>/mcp/
  

  This exposes some Pioreactor tools in real time. It’s still experimental — your feedback and suggestions for additional tools/resources are welcome!

Enhancements

• Added Time Range filter to the Export Data UI page.

• The “Add a new Pioreactor worker” dialog now automatically scans for and lists local workers available to join your cluster.

• New config.ini option:

  [od_reading.config]
  duration_between_led_off_and_od_reading = <seconds>
  

  This adjusts the pause between turning off LEDs and taking an OD snapshot.

• pios X --experiments <experiment> now lets you target workers by experiment from the leader CLI.

• More CLI options are available for jobs with settable: True published_settings.

• New API endpoints:

  • /unit_api/capabilities
  • /api/units/<pioreactor_name>/capabilities
    These provide detailed information about what each Pioreactor can run.

Breaking changes

• API changes:

  • api/units/<unit>/configuration response format updated.

  • Stirring settings endpoint now scoped to experiments:

    /api/workers/unit1/jobs/settings/job_name/stirring/experiments/<exp>
    

  • Removed: /api/workers/jobs/stop/experiments/<exp>
    Use: /api/workers/$broadcast/jobs/stop/experiments/<exp>

  • Removed: /api/experiments/<experiment>/jobs/settings/job_name/<job_name>
    Use: /workers/$broadcast/jobs/settings/job_name/<job_name>/experiments/<experiment>

• pio logs no longer follows by default — use -f to follow.

• Developers: We’ve merged our three main repositories (pioreactor, pioreactorui, pioreactorui_frontend) into a single monorepo: pioreactor. The old repos will be archived, and update code in pio.py will now point to the new repo. If you have branches on the old repos, rebase onto pioreactor. Discussion: GitHub issue #576.

Bug fixes

• Fixed default sorting when exporting CSV.
• Fixed crash in UI profile editor.
• Fixed pumps not shutting down correctly if active when dosing_automation stopped.
• Fixed cleanup issue in growth rate calculation.

25.8.8rc0

Upcoming

25.8.7rc0

Upcoming

Some big changes internally

Highlights

• Users have been very creative in adapting the Pioreactor hardware and software to different bioreactors. We have a new tool you can use: adding custom bioreactors models to incorporate into the Pioreactor software! There is a new .pioreactor/models/ directory where you can place custom bioreactors. For example:

  model_name: custom_100ml
  model_version: "1.0"
  display_name: "Custom 100 mL, v1.0"
  reactor_capacity_ml: 100.0
  reactor_max_fill_volume_ml: 95.0
  reactor_diameter_mm: 50.0
  max_temp_to_reduce_heating: 80.0
  max_temp_to_disable_heating: 85.0
  max_temp_to_shutdown: 90.0
  

  This data will be used throughout the software (including in the UI) to support other bioreactor shapes and sizes. Let us know what else you would like to see!

• adding mcp server

Enhancements

• time range filter in export data page
• ability to change the pause between LEDs and OD snapshot
• pios X --experiments <experiment> can be used to select workers on the leader command line.
• ideally, if a published_setting is settable: True, there should be a CLI option to set it. We've added a bunch of new CLI options to existing jobs.
• new /unit_api/capabilities and /api/units/<name>/capabilities to get lots of details about what a Pioreactor can run.

Breaking changes

• adding /experiments/<exp> to the end of endpoint /api/workers/unit1/jobs/settings/job_name/stirring/
• removed /api/workers/jobs/stop/experiments/<exp>, use /api/workers/$broadcast/jobs/stop/experiments/<exp> instead.
• removed /api/experiments/<experiment>/jobs/settings/job_name/<job_name>, use /workers/$broadcast/jobs/settings/job_name/<job_name>/experiments/<experiment>

Bug fixes

• fix export data sorting
• fix UI profile editing crashing

25.7.15rc0

(Test for monorepo building)

25.7.2

25.7.2

🔥 hot fix release for 25.6.25

Bug fixes

• Fix error when target_rpm_during_od_reading is 0 and dodging is active.
• Fix exporting pioreactor unit labels dataset.
• Fix LED not working when booting a fresh worker.
• Fix for plugins that use the "dodging" behaviour. Your air-bubbler plugin probably broke - this fixes it.