Enabling WiFi

Starting from Rabbit GRBL v1.6.0, your CNC machine can connect to your home or workshop WiFi network. Once connected, you can control your machine without a USB cable — from your PC, laptop, or tablet over the network.

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Before You Start

You will need:

• A WiFi network name (also called SSID) — this is the name you see when you connect your phone to WiFi
• The password of that WiFi network
• A serial terminal or CNC control software (Gcode Sender) connected to the machine via USB to type in the settings

💡 You only need to do this setup once. After that, the machine will remember everything even after it is turned off.

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Step 1 — Type the three settings

Connect to your machine via USB as you normally would, open the console in your CNC control software (Gcode Sender), and type the following three commands one at a time. Press Enter after each one.

Set the WiFi mode to ON:

$73=1

Set your WiFi network name:

$74=YourNetworkName

(Replace YourNetworkName with the actual name of your WiFi)

Set your WiFi password:

$75=YourPassword

(Replace YourPassword with your actual WiFi password)

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Step 2 — Reboot the machine

Turn the machine off, wait a couple of seconds, then turn it back on.

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Step 3 — Find the IP address

After rebooting, keep your USB cable connected and look at the console in your CNC software. Within a few seconds you should see a message like this:

[MSG:WiFi connected - IP: 192.168.1.105:5001]

Write down the numbers — for example 192.168.1.105 and the port 5001. You will need them in the next step.

💡 The default TCP port for Rabbit GRBL WiFi connections is 5001.

⚠️ If you don't see this message, or you see [MSG:WiFi connection failed], check that your network name and password are correct (Step 1) and reboot again.

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Step 4 — Connect your CNC software over WiFi

In your CNC software (for example SourceRabbit Focus), instead of choosing a USB/COM port, look for a Network or TCP connection option and enter:

• IP Address: the numbers you wrote down (e.g. 192.168.1.105)
• Port: 5001 (default TCP port)

You are now connected wirelessly! You can unplug the USB cable.

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To Turn WiFi Off

If you ever want to turn WiFi off, just send:

$73=0

Then reboot the machine.

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Something went wrong?

What you see	What to do
[MSG:WiFi connection failed]	Your network name or password is wrong. Re-enter $74 and $75 carefully and reboot.
[MSG:WiFi SSID ($74) is not set - WiFi disabled]	You forgot to set the network name. Send $74=YourNetworkName and reboot.
No message at all after reboot	Make sure $73=1 was saved correctly. Send $$ and check that $73 shows 1.
It worked before but now it can't connect	Your router may have changed the machine's IP address. Check your router's device list for the new IP, or assign a fixed IP to the machine from your router settings.

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WiFi Settings Summary

Setting	What it does	Example
$73	Turns WiFi on or off (0 = off, 1 = on)	$73=1
$74	Your WiFi network name	$74=MyHomeNetwork
$75	Your WiFi password	$75=MyPassword123

✅ Settings are saved automatically. You do not need to do anything else after typing them.