App setup and firmware update

You have many options using Merlin400, especially if you get your extractor online and connected to the app. This guide will help you through getting Merlin400 online, accessing and using the app, and show you how you an update the firmware in your Merlin400.

In the video, Peter explains how to connect the machine to Wifi, what you can use the app for, and how to update Merlin400. If you prefer the text-based guide, please read on:

Connect Merlin400 to the app

This will give you access to additional functions, including updating the software on your machine.

After connecting your Merlin400 to the app, you can update it to the latest software version. This will give you the best experience, and we recommend you do this before using the machine for the first time.

You will need information from your product label – It looks like this. You find it on your manual and under your Merlin400.

You can continuously update your Merlin400 as we release new software. The app will tell you if there is a new software release for you. Merlin400 will work offline, but you will not get updates.
Also, the app gives you access to a few extra programs, a ‘Vent Valves’, a ‘just extract’ and a ‘just distill’ program, not available from the physical user interface.

Step 1: Turn on Merlin400

search for available wifi networks, and select Merlin400 ‘s access point. In this case it is merlin_ap_e25eab.

Turn on your Merlin400 and wait for the green play button to stop flashing. Please wait another 30 seconds after the flashing stops before proceeding to the next step.

Step 2: Connect to Merlin’s access point

Your Merlin400 has a built-in WiFi access point. You need to log on to it, to make the first ‘handshake’. Here’s how:

Use your phone or another device with WiFi to search for the Merlin400 WiFi access point. The name of the access point is on your product label as “SSID”

Step 3: Enter password for Merlin400

You find the password on your product label as “PSWD”. Remember that all letters are uppercase.
With the correct password entered, proceed to connect your device and wait until the connection is established. It will not connect to the Internet and will most likely indicate “limited connection”. That’s all right.

Step 4: Give Merlin400 internet access

Launch your favorite browser on the phone or device you have just connected to the machine.
Enter the address:, and you will land on a web page similar to the one on the right.

Step 5: Select your normal WiFi

Select the WiFi connection you normally use for internet access from the drop-down menu on the web page.

Step 6: Enter password

Enter the password for your WiFi access point at home. and tap “Connect Merlin’s WiFi”.
This will make Merlin400 restart, and your app will pause for approx. 1 min while this is happening.
Now You can reconnect your phone or device to your normal WiFi connection unless it has already happened automatically.
When Merlin400 has restarted, it has internet access via your normal WiFi connection.

Step 8: Check that machine is online

After reboot, and once the play button is steadily lit up, you can check the internet connection by holding down the “select” button (the leftmost button on the user interface on top of the machine) for three seconds until play flashes.
If play flashes green, it is connected to the Internet, and if it flashes red, it is offline.
If red, go back and repeat this guide from step 1.

Using the Merlin400 App

Step 9: Access the Merlin App
Your phone or device is now paired with Merlin400 and Merlin400 is online.
Your browser should automatically go to and look like the image on the left.

When you want to use the app in the future, simply go to on the paired device.

In the app, you have 3 buttons at the bottom line, Dashboard, Programs, and Settings:

the Dashboard page in the App


gives you an overview of the status of your Merlin400.


gives you access to selecting a number of programs, including a few you can not access from the physical user interface on the machine.

to run a program, simply click it on the Programs page. You will be sent to the Dashboard, where the top line will indicate which program is chosen.

To start the program, press the arrow in the green circle in the bottom right corner.
If you, for some reason want to abort a running program, reset the machine by pressing the ‘select’ and ‘pause’ buttons on the physical user interface simultaneously.


gives you access to extra functions, including firmware update.

Upgrade firmware

We strongly recommend upgrading the firmware before your first extraction. We continuously improve the software, so an updated machine will give you the best user experience and extraction result.
Step 10 and 11 below will guide you through the update process:

The Dashboard, Programs and Settings buttons, at the bottom line of the App

Step 10: Select icon “settings”

Tap the icon “Settings” at the bottom right of the app.

Step 11: Upgrade your Merlin400

Press “upgrade firmware”
The machine will start flashing red and then flashing green for a few minutes.
When it is stable again, your machine is upgraded to the latest software and you are ready to extract.