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1.7 Wireless Control

The YUMI L Series (Lasers) can be controlled over Wi-Fi without a physical display, using a PC, smartphone, or tablet. This section explains how to connect the laser to Wi-Fi, and how to access the Web Control Interface.

1.7.1 Connection Methods

Method 1 – Serial Command via USB

  1. Install USB Driver (if needed)

  2. The MKS DLC32 controller uses a CH340 USB-to-serial chip.

  3. Some PCs (especially Windows) require the driver to be installed so the laser can be detected as a COM port.
  4. On Windows, check the assigned COM port in Device Manager.

  5. On Linux/macOS, the driver is usually included by default.

  6. Connect to the Laser

  7. Open LaserGRBL, LightBurn, or another serial console.

  8. Select the laser’s COM port and connect at 115200 baud.

  9. Send Wi-Fi Credentials (replace with your own network details):

[ESP100]Your_WiFi_Name
[ESP101]Your_WiFi_Password
[ESP115]ON

USB serial connection example

  1. Retrieve IP Address

  2. In most cases, once the Wi-Fi connection is successful, the controller will automatically display the IP address in the console or software window.

Wi-Fi connected message

  • If the IP is not shown automatically, you can request it manually by sending the command:
[ESP111]

ESP111 command example

  • The laser will then return its assigned IP address (e.g., 192.168.0.105).

Returned IP address example

Method 2 – Setup via SD Card (dlc_cfg.txt)

  1. Insert the SD card into your computer.

  2. Create or edit the file dlc_cfg.txt (the filename must be exactly this).

  3. Add your Wi-Fi credentials, for example:

//--WIFI configuration---//
[ESP110]STA
[ESP131]8080    
//wifi name
[ESP100]Your_WiFi_Name(SSID)
//wifi password
[ESP101]Your_WiFi_Password

  • Do not modify other parameters.

  • Save the file and insert the SD card into the controller.

  • Power cycle the device.

  • Update takes ~10 seconds.

  • After reboot, the laser connects to Wi-Fi automatically (in about 5 seconds).

  • Retrieve the IP address:

  • From your router’s DHCP list, or

  • By sending [ESP111] once via USB.

Retrieve IP via ESP111

Method 3 – Using MKS Laser Tool

  1. Download MKS Laser Tool.

  2. Connect the laser via USB and select the detected COM port.

MKS tool COM port

MKS tool connection

  1. Enter Wi-Fi SSID and password, then click Connect Wi-Fi.

MKS tool Wi-Fi setup

  1. The software displays the assigned IP address.

MKS tool IP display

1.7.2 Accessing the Web Control Interface

Once the laser is connected to Wi-Fi and the IP address is obtained:

  1. Open your web browser.

  2. Enter the laser’s IP address (e.g., http://192.168.1.70).

Web control panel interface

  1. The Web Control Panel appears.

Web control panel interface

1.7.3 Web Control Panel Features

Below are examples of the Web Control Panel showing key functions:

  • Main Controls

  • Move the laser head manually

  • Adjust laser power and speed

Web control panel interface - Control

  • File Management (SD Card)

  • Upload, select, and delete files

  • Monitor job progress in real-time

Web control panel interface - SD File

1.7.3 Tips for Stable Wireless Use

  • Keep the laser close to your Wi-Fi router
  • Avoid congested Wi-Fi channels
  • For large files, USB transfer is more reliable