> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.simplyprint.io/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Why is my printer offline?

# Why is my printer offline?

This guide helps you quickly identify and fix why your printer shows offline in SimplyPrint. Find your integration type below for targeted troubleshooting.

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## Bambu Lab

SimplyPrint connects to Bambu Lab printers through the **SimplyPrint Bambu Lab Client** - running on the device where you installed it during [initial setup](https://simplyprint.io/setup-guide#bambu:1).

**Quick checklist:**

1. Is the SimplyPrint Bambu Lab Client running?
2. Open the client - what status does your printer show? (Offline/Connecting/Online)
3. If stuck on Connecting, restart the client
4. Make sure **LAN-only Mode** and **Developer Mode** are enabled on your printer

[Full Bambu Lab troubleshooting guide](https://help.simplyprint.io/en/article/why-is-my-bambu-lab-printer-offline-zo4a4h/)

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## OctoPrint

SimplyPrint connects through the SimplyPrint plugin installed in OctoPrint.

**Quick checklist:**

1. Is your printer online in OctoPrint itself? If not, fix that first
2. Is the SimplyPrint plugin installed and enabled?
3. Check your USB cable - must be a data cable, not charge-only
4. Check Raspberry Pi power supply - undervoltage causes disconnections

[Full OctoPrint troubleshooting guide](https://help.simplyprint.io/en/article/why-is-my-octoprint-powered-printer-offline-1rqmxh9/)

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## Klipper (Mainsail/Fluidd)

SimplyPrint connects through **Moonraker** - the API that Mainsail and Fluidd also use.

**Quick checklist:**

1. Can you access Mainsail or Fluidd? If not, your printer has issues - not SimplyPrint
2. Is `[simplyprint]` in your moonraker.conf?
3. Try restarting Moonraker from the web interface

[Full Klipper troubleshooting guide](https://help.simplyprint.io/en/article/why-is-my-klipper-powered-printer-offline-r4gwnc/)

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## Experimental integrations

These integrations are in beta with limited support. Try restarting the integration service first.

- [Prusa Direct](https://help.simplyprint.io/en/article/why-is-my-direct-prusa-integration-printer-offline-17e051q/) - Check for blue firmware and SimplyPrint tab
- [Duet3D](https://help.simplyprint.io/en/article/why-is-my-duet-powered-printer-offline-1n6bgly/) - Restart service, check config file
- [Elegoo](https://help.simplyprint.io/en/article/why-is-my-elegoo-printer-offline-1gvjeyc/) - Restart service, check network
- [UltiMaker](https://help.simplyprint.io/en/article/why-is-my-ultimaker-printer-offline-1jsh5v0/) - Restart service, check Digital Factory

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## Still need help?

- **SimplyPrint Discord:** [simplyprint.io/discord](https://simplyprint.io/discord)

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> Something unclear or missing in this guide? Let us know on [Discord](https://simplyprint.io/discord).