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

# 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Some FLSUN T1 Pro/Max printers ship with outdated SSL certificates, which may prevent SimplyPrint from connecting properly.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

New to SSH? Check out our setup guide on what it is and how to use it; [SSH: What is it and how to use it](https://help.simplyprint.io/en/article/ssh-what-is-it-and-how-to-use-it-1pb1aq0/)


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:  
```bash
   ssh pi@[ip-address]
```
Example;
```
ssh pi@192.168.1.25
```

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; https://simplyprint.io/setup-guide#klipper:1

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