Setting up SimplyPrint for FLSUN printers

FLSUN T1 Pro/Max setup: Update certificates to enable SimplyPrint support

Some FLSUN T1 Pro/Max printers ship with outdated SSL certificates, which may prevent SimplyPrint from connecting properly. To fix this, you just need to run a quick command on your printer via SSH.

Step 1 – Connect to your printer via SSH

1. Find your printer's IP address (usually shown on the printer's screen).
2. Open a terminal:

• Windows → Command Prompt
• Mac → Terminal

3. Enter the following command, replacing [ip-address] with your printer's IP:

ssh pi@[ip-address]

Example:

ssh [email protected]

4. When prompted for a password, enter:

1

(yes, the password is just "1" by default)

(it won't show as you type, just press ENTER)

Step 2 – Run the certificate update fix

Once connected to your printer, paste this one-liner and press ENTER:

wget -qO- https://download.simplyprint.io/flsun/flsun-ssl.sh | sudo bash

This is a small script made by us to update the certificates to allow your printer to connect to our servers.

Step 3 – Verify success

If no errors are shown when running the command, the update worked.

You can now try connecting SimplyPrint again via the Klipper setup guide: Klipper Setup Guide

✅ That's it — your FLSUN T1 Pro/Max should now be able to connect to SimplyPrint.