OctoPrint-OctoCheese

OctoPrint Plugin that controls a cheese making device running Marlin. Provides several new Gcode commands for stirring, wait for x seconds, wait for x temperature and sending notifications to MQTT.

Sending notifications to MQTT allows you to integrate with Home Assistant to get notifications on your mobile or via your home's smart devices.

The above image shows my current setup with OctoPrint + OctoCheese running on the left browser window and my Home Assistant dashboard on the right browser window.

Setup

1. Install via the bundled Plugin Manager or manually using this URL:

https://github.com/thomaspreece/OctoCheese/archive/main.zip

2. Install MQTT Plugin (Only required for MQTT messages & Home Assistant Integration). Once installed you will need to configure the plugin to talk to your MQTT server. You will also want to set the Base Topic setting to octoPrint/ and enable progress and temperature messages in the MQTT settings as shown in the image below.

3. Restart OctoPrint

Configuration

Configure via the OctoPrint settings UI. By default the plugin assumes:

• The X Axis is the stirring stepper
• The water heater is plugged into the "Bed" heater port
• The water heater temperature is plugged into the "Bed" temperature port
• The Milk temperature is plugged into the "Hotend" temperature port

If using the CheeseMaker Circuit then the above assumptions are correct

Gcode

• M950 S0 - Turn stirrer off
• M950 S1 - Turn stirrer on
• M951 S100 - Pause octoprint print job for 100 seconds
• M951 - Cancel previously issued wait (from OctoPrint Terminal only)
• M140 S38 - Heat "bed" (water bath) to 38C
• M952 B38 - Pause octoprint print job until "bed" temperature (water temperature) is over 38C for at least 9s
• M952 H38 - Pause octoprint print job until "hotend" temperature (milk temperature) is over 38C for at least 9s
• M952 - Cancel previously issued temperature wait (from OctoPrint Terminal only)
• M953 STRING - Send STRING to MQTT
• M954 STRING - Send STRING to MQTT and wait for user
• M954 - Cancel previously issued wait for user
• M955 S1 RENNET - Release Rennet
• M955 S0 RENNET - Unrelease Rennet
• M955 S1 CALCIUM_CHLORIDE - Release Calcium Chloride
• M955 S0 CALCIUM_CHLORIDE - Unrelease Calcium Chloride
• M955 S1 ANNATTO - Release Annatto
• M955 S0 ANNATTO - Unrelease Annatto
• M955 S1 CULTURE - Release Culture
• M955 S0 CULTURE - Unrelease Culture

Example GCode

You can find gcode for testing different functionality of the Cheese-o-matic inside of the Test_Programs folder. You'll also find full gcode for making cheeses inside the Cheese_Programs folder.

Home Assistant Integration

To use with Home Assistant you need to have MQTT enabled as detailed above. You then need to add the contents of ./home_assistant/configuration.yaml to your home assistant configuration.yaml file. This will provide you with all the sensors to use in your dashboards. An example dashboard is provided in ./home_assistant/dashboard.yaml

Known Bugs

• Currently there is an issue where the firmware on the Arduino will disconnect requiring a power cycle when too many consecutive message GCodes are issued (M953 & M954).