Interface Cards



How to connect an Epson TM Series Printer with a Wireless Dongle

Installing Adapter
Network Setup
Checking Adapter Settings
Configuring Router
Configuring Computer
Configuring Adapter
Installing Driver
Ordering Information

Wireless Interface Card
Wireless Mobile Printer

. A wireless printer replaces the traditional data cable with wireless adapters on the computer and printer, linked with a radio signal. Once a wireless connection is established it offers a way to print documents without a direct connection. Epson introduced the wireless dongle as a means of adding wireless capability to compatible printers and interface cards.

Features Product Package
The OT-WL02 is installed in the TM-series printers to provide Wireless Ethernet communications.
  • Compliance with IEEE 802.11b, 802.11g, and 802.11n wireless communication standards
  • Extension cable (1 m) for installation according to the radio wave conditions at the customer's installation site
  • Rubber cover to prevent disconnection of the wireless LAN unit from the extension cable
Included in OT-WL02 package:
  • Wireless LAN dongle
  • USB extension cable
  • Affixing tape (1 pair, 2 pieces)

Required Components

  • Epson POS Printer with USB dongle jack

Watch our How-to video on YouTube!
(Coming soon)

Epson Products Covered

Identifying the Type of  Wireless Dongle

There are three types of the Epson Connect-It wireless dongles, the original OT-WL01 and the newer OT-WL02 and OT-WL05. The OT-WL05 dongle features a dual frequency support.


Installing and Setting the Connect-It Wireless Adapter
Install the  wireless adapter  dongle by plugging it into the jack in the back of  the Epson TM series printer

The dongle installs between the power cord and the USB connection on the back of this TM-T88VI

Wireless Indicator

Note that if you are using another interface installed in the computer, such as Ethernet, 
it may turn off the power to the dongle as long as the interface is active.


Power-supply Voltage DC +5 V
Current Consumption Maximum 0.4 A
Frequency Range
2.4 GHz band (1 to 13 Ch)
Channels 1 to 11 are only available for 738 model.

40 m
Dongle Dimensions Approx. 24 x 51 x 10 mm (W x D x W)

Limitations for wireless communication

  • The transmission of the radio waves cannot be stopped. The only way to stop the transmission of radio waves is to turn the TM printer off.

  •  Countries where this product can be used are limited. Since notes are provided for each country, check the manual supplied with the product.

  • When setting the encryption type, there are the following restrictions:

    • WPA/WPA2-PSK is not available in the Ad-Hoc mode.

    • When using the OT-WL02 in the Ad-Hoc mode, printing a status sheet is subject to the following restrictions

    • Even if there is no host computer to connect to, “Connect” appears as the Link Status.

    • Between power-on and the time when the printer to connect is found, “0dBm” appears as the Signal Level. If the host computer connected to the TM printer discontinues communication, the value that had been obtained immediately before discontinuation of communication is held appears.

Environmental Specifications

  • Temperature Operating Conditions 0 to 45░C {41 to 113░F}

  • Storage Conditions -5 to 50░C {23 to 122░F}

  • Humidity Operating Conditions 10 to 90% RH

  • Storage Conditions 10 to 90% RH

Network Setup
The wireless dongle can be "connected" via a wireless adapter installed in a computer or through a wireless router. To connect to your local network the printer must be set to settings compatible with your network. To set the settings on the adapter you must first connect to the printer in its current or default state.  Configuration of the adapter is is done from a computer using the EpsonNet utility.



Connecting the Wireless LAN Unit

  • To connect the wireless LAN unit to the printer, you can connect it directly or use the USB extension cable.

  • If connecting the wireless LAN unit directly causes interference with other cables or bad communication situation, use the included USB extension cable.

Connecting the Unit Directly with the Printer

  • Insert the wireless LAN unit to an USB connector of the printer.

  • The position of the USB connector varies by printer. For details, see the user’s manual for each printer.

What's included in the box USB Extension Cable

1 Attach the included rubber cover to the connector of the USB extension cable into which the wireless LAN unit will be inserted, to prevent the unit from coming off.

2 Insert the wireless LAN unit into the connector of the cable.

Adjust the position of the rubber cover so that a description of the label on the back side of the wireless LAN unit is not covered.

Connecting to the Network

The method for connecting the wireless LAN unit to the network differs if you use an Epson TM printer that supports the Simple Access Point (SimpleAP) mode or use a TM printer that does not support the SimpleAP mode. In SimpleAP mode, the printer functions as a simple wireless access point. In this mode you can connect to it in the same way as connecting to an access point.
The following situations are discussed:

Setting up from a Smart Device

Necessary Items. Prepare the following items:

  • Printer which supports this wireless LAN unit

  • Device for setting: iOS or Android device

  • Utility for setting: Epson TM Utility for iOS or Epson TM Utility for Android
    Epson TM Utility A utility that can be downloaded from App Store or Google Play. It is available for iOS, Android.

When you set up the access point at the same time, set the access point in advance and check that this product operates correctly.

  • Examine the radio wave situation in the surrounding area before use.

  • Avoid using the same channel that is used in the neighboring shops where wireless LAN is used.

  • When using this product in environments where kitchen microwaves and other devices that may interfere radio waves are installed, observe the following points.

  • Keep this product away from the devices, such as kitchen microwaves, that may cause radio wave interference.

  • Use channels that are away from the frequency bands that may cause radio wave influence.

  • Place shields between the printer and the devices that may cause radio wave interference.

  • Use a bandwidth that does not generate interference.

  • In auto channel setting for the access point, do not select a channel in which the devices may cause radio wave interference.


  • Once wireless LAN network settings are performed, the printer will not start up in SimpleAP mode.

  • If you want to start it up in SimpleAP mode, initialize either the printer or the interface unit which is installed in the printer. For the initialization method, see the user's manual for the printer or the interface unit.

  • When the Wireless interface is active the printer's built-in Ethernet connection may be disabled. Similarly, if the built-in Ethernet connection is active it may disable the wireless dongle.

Epson TM Utility

 Use the Epson TM Utility to quickly connect your TM-T88VI printer with Wi-Fi dongle to a Wi-Fi network. Use it to check and change setting values on the printer from iOS and Android devices. 
This utility also comes with the following sample printing functions:

  • Sample receipt printing
  • Customized receipt printing
  • Printer status display
  • Quick pairing by NFC/QR code
  • Easy print by NFC/QR code

Running the Epson TM Utility

Setup and Operation Work flow:

  • Open TM Net

  • Select the network you want to connect to.

  • Enter the passkey.

  • Perform a test print.

1 Run the Epson TM Utility

2 Set from “Wi-Fi Setup Wizard” in the menu.

3. Select the model of the printer you want to connect to from the list, press Next

4. Choose the the type of Wi-Fi Interface you have, Select "Wireless LAN Unit" for the dongle.

5. The printer will then print a SimpleAP Status Page check

SimpleAP Start

Encryption Type WPA2-PSK
Passphrase 12345678
IP Address (default)
MAC Address (example) 64-EB-8C-CE-09-FC

This status message shows the current SSID , the Encryption type, passphrase, current IP and MAC address of the dongle. These are the values currently set on the device before TM net sets them for your network.

6. TM Net will then turn on Wi-Fi on your device if not currently connected

7. TM Net will then ask you to select a Wireless Network, presenting you a list of network names (SSID). Choose the appropriate network.

8. Specify Auto for  having the router automatically assign the IP address or Manual to Manually enter an IP address for the printer.

9. TM Net will then ask if you want to send the new settings to the printer. Check the settings and send.

10. The printer will be now be selected and ready with the new settings.

11 You can then check the printer settings, confirming the IP address of the printer.

Setting up from a Windows Computer

Necessary Items. Prepare the following items:

  • TM printer: Wireless LAN unit is installed

  • Computer for setting: Computer equipped with Windows 10/8/7/Vista/XP/2000, and a wireless LAN function

  • Utility for setting: EpsonNet Config

Follow the steps below to connect the printer.

1 Turn on the printer.

2 Activate Windows Wireless Network Connection and select [EPSON_Printer] as the connection device on the screen that appears.

If the window to enter a pass phrase appears, enter “12345678”.

Default settings on printer are the following values.

An example of Connection Screen

When connecting to the printer is complete, setup the Wireless LAN by using the EpsonNet Config.

• For the setting method for the computer for setting, see the manual for your computer.
• If you are setting multiple TM printers, only turn on the power for the printer you are setting. You cannot set multiple printers at the same time.

3 Start up the EpsonNet Config of the setting computer.

Network mode

SimpleAP mode
Pass phrase 12345678
IP Address

4 The “EpsonNet Config” window is displayed. Select the printer for setting and click the [Configuration] button.

If the printer is not displayed, click the [Refresh] button. If it is still not displayed, reconfirm steps 2

and 3 in "Setting up from a Windows Computer".

NOTE: It can take 20 seconds or longer for the printer to be displayed.

5 Configure the [Network] settings and the [TCP/IP] settings.

For detailed information about EpsonNet Config, see the EpsonNet Config manual (operation guide) or the EpsonNet Config online help. Be sure to confirm the necessary setting information with your network administrator.

Setting is completed and the settings for the printer or the interface unit mounted on the printer are changed. The connection with the setting computer is cut according to the setting item and it is not displayed in the “EpsonNet Config” window.

6 When setting the Wireless LAN is complete, restart the printer.

 Connecting a Printer without SimpleAP mode

To connect a printer that does not have the Simple AP mode, or  for printers with the SimpleAP mode whose network settings have already been configured and need to be changed, you can change the settings as described below.

Printing a Status Sheet

Print a Status Sheet to confirm the setting of the printer or interface board which is installed in the printer.

On the TM-T88VI there is a recessed button midway on the back of the printer accessible though a hole in the plastic case. Hold the button down with a paper clip for 10 seconds while the printer is on, and the dongle is installed to print out the current settings.

For printing instructions on other printers, see the user's manual for the printer you are using or the Technical Reference Guide for the printer's interface unit.

An example of a Status Sheet with Wi-Fi Adapter Card:

Settings from TM-T88VI with Dongle Installed (click for detail)

Connection from the Setting Computer

Connect the setting computer to the access point by the wired LAN. The setting of the access point is set for the Status Sheet.

The setting items are as follows.

  • SSID (Ex: EpsonNet)

  • IP Address (Ex:

(Don't set the same address as the IP Address of the printer to the setting computer and the access point. Example: If the IP Address is, the IP Address of the setting computer should be set to another number, such as The same address ( cannot be used.)

  • Channel (Ex: 11 ch)

  • Security setting (Ex: WPA2-PSK)

  • Passphrase (Ex: EpsonNet)

At this stage, the TM printer can communicate with the setting computer.

Setting the Printer

To set the printer or the interface which is installed in the printer, follow the steps from 3 to 5 in "Setting up
from a Windows Computer".



Initial Value

Setting Instructions

Network Mode AdHoc  Infrastructure / AdHoc
Use ad-hoc if connecting directly to a device, Infrastructure if installing the printer on a network.
ad-hoc mode (also called peer-to-peer) is a method for wireless devices to directly communicate with each other. Operating in ad-hoc mode allows all wireless devices within range of each other to discover and communicate in peer-to-peer fashion without involving central access points.
mode implies there is a common wireless access point, such as a wireless router.
SSID  EpsonNetIBSS Set this according to the system or leave as is.
IP-Address Set the printers IP address.
Notes: The actual IP address chosen should be valid for your network (the default value probably will not work).
Every device on a network must have a unique IP address
Subnet mask Set this according to your network or use default.
Gateway address Set this according to your network. Leave blank if unsure.
IP-Address setting Manual Auto / Manual. Set this according to the way IP addresses are assigned on your network.
Use WEP key None  None / 64-bit / 128-bit
WEP Key None set this if key is used
Channel 11 Channels 1-11. When using Ad-Hoc mode, set
the channel directly. When using in the
infrastructure mode, it is set automatically.

Default Settings on an Epson UB-RO3 Wireless Card

Basic Printer Information of UB-RO4 card from EpsonNet

Default Wireless Configuration Information of UB-RO4  from EpsonNet

Default Security Settings of UB-RO4 from EpsonNet. Note the change in Communicate Mode, 
SSID and Security Level from earlier Epson wireless cards.

Configuring a computer or router to access the Wi-Fi dongle

There is no way to change the settings on the dongle directly. You first must connect to a computer and then change any settings using the Epson EpsonNet utility. This means that you must modify your computer's or router's wireless settings to work with the adapter to make changes on the wireless adapter to work on your network. After the changes are made you can reset your network to its original settings.

Tip: It may be less disruptive to configure the wireless adapter using a different computer or network from the one it is to be installed on.


Use an Ethernet cable connection for configuration:

  1. Install the Wi-Fi dongle into the printer.

  2. Connect the printer to the router with an Ethernet cable

  3. Open the EpsonNet  utility to access the Wi-Fi dongle under the  interface section

  4. Press the Configuration button to access the card

EpsonNet is the new version of Epson's TMNet

After scanning for devices, the EpsonNet utility will get the current card configuration

This shows an TM-T88V printer with wireless card installed (connected to EpsonNet with a USB cable)
On a TM-T88VI you must use an Ethernet cable to connect the printer to configure with EpsonNet.

Configuring the wireless interface using the USB interface (UB-R03)

Configuring a Wireless Router
If you are using a wireless router to connect with the printer:

  • Systems with  a wireless router or multiple wireless printers will want to  use the Infrastructure mode with a router.

  • Set the subnet to work in the address range of the wireless adapter ( if using default value)

  • Make sure the wireless broadcast is on

  • Turn off  encryption or WEP

  • Turn off firewalls and filtering

Configuring a Computer with a Wireless Adapter
If you are using a wireless adapter installed in a computer to connect with the printer:

  1. Install the wireless adapter on the computer if not already installed

  2. Change the wireless adapter to Ad-Hoc. Open up the Wireless Adapter tab and press Advanced. Then change the Networks to access to ad-hoc.

  3. Open the Wireless Adapter Properties in the Network Connections of the Windows Control Panel. If the first three numbers of your IP Address are 192.168.192 (assuming the wireless adapter is set at the default IP address of then you do not need to reconfigure your computer’s IP Address. If the first three numbers of your IP Address are not 192.168.192, (Ex. 192.168.1), then you need to change your computer's IP address to an address in the same subnet. Change the IP address to a static IP address. Then make the IP address of the adapter different than the wireless adapter (like Do not set the computer to the same address as the wireless adapter on the printer.

  4. Disable the computer's wired network adapter (Local Area Connection) if installed (The EpsonNet utility doesn't seem to work when there is also a live wired network card enabled)

Making the Initial Connection from the Computer to the Printer
If you are using a wireless adapter installed in a computer to connect with the printer you can now make the initial connection to the printers.

Open up the View Wireless Networks in the Wireless Adapter properties.

The printer will be visible as EpsonNETIBSS  (or EpsonNet on UB-R04) as a "unsecured computer-to-computer network" (with the default settings).

Click on the connection to connect to the printer:

This should establish the connection between the printer and the computer.

This is the general setup screen of the printer

Verifying the Connection from the Router to the Printer
If you are using a wireless router then you should verify that the printer is connected to the router.

  • Turn the printer on

  • Log onto the router administration from a computer on the network.

  • Check the wireless device status

  • Verify that the printer is communicating with the router by finding the IP address or MAC address of the printer in the wireless device connection list on the router. If the device is not listed see the troubleshooting steps below.

Look for IP or MAC address of adapter on router

Pinging the Printer
You can verify the printer is connected to the computer by pinging the printer from the computer.
Open up a command window and enter:

ping <IP_address>

where <IP_address> is the IP address of the printer (i.e.

The printer should reply to ping requests. Repeated timeouts indicate that the printer is not connected. If the printer does not reply verify the IP address of the printer and the Ping setting on the Wireless adapter properties.

Configuring the Dongle with TMNet or EpsonNet

Running the EpsonNet configuration utility on the Computer
You can run the EpsonNet configuration utility on your computer to view or change the settings on the wireless dongle. This utility will scan for the wireless printers on your network and allow you to make changes to the adapter's settings.

To obtain the EpsonNet configuration utility from Epson's website:

  1. You may have to re-enable your wired LAN port to download the EpsonTMNetWinConfig utility.

  2. Download and Install Epson’s EpsonNet for Windows available from



  5. Click the download icon for the EpsonNet WinConfig

  6. For detailed installation instructions, click here.

The utility will scan for and will list the wireless printers.

 If you are using the Wi-Fi dongle on a TM-T88VI then attach the printer to the Wi-Fi router via an Ethernet cable. Then run the EpsonNet utility on a computer or device on the same network. If using the USB connection on a UB-R03  or UB-R04 wireless card then the card will appear under the USB interface section.

Select the printer and press Configuration to view or change settings.

Setting IP with the orginal TMNet

Setting IP with EpsonNet utility

When you make changes and press 'OK' or "Transmit" the utility sends the new settings to the printer and resets the printer. Note: the default password is <blank>. Don't forget to make the same changes on the computer side to maintain connectivity.

The utility sends the settings to the card and resets the printer.

Installing the Printer Driver in Windows
The printer drivers are available directly from the Epson POS site (see the instructions above). Select the printer you are using to get the drivers to work with wireless adapter. The printer should be visible in the printers folder of the Windows Control Panel.

Configuring the Printer in Windows
You need to make a few changes in the printer settings to get it to work with the wireless adapter. Specifically you need to configure the port you are using. Open the printer in the Windows Printer Folder. Select the Ports Tab. Turn off bidirectional support, if enabled.

You must now add the port as s TCP/IP port. Press "Add Port" and select "Standard TCP/IP Port" , then select "New Port". This will open up the Add Standard TCP/IP Printer Port Wizard". Enter the IP address of the wireless adapter (default: The utility will then locate the printer on the wireless network and create the port. This port (IP_...) will now be selected fro use with this printer.


Testing the Printer
You should now be ready to test the printer by printing some text.


Connectivity Problems

  • The wireless adapter has not been configured to work on your local network. Confirm network settings using the show adapter settings procedure.

  • There is no wireless device for the adapter to talk to. Check for the adapter's presence by looking for its IP address or MAC address on the computer's wireless adapter or wireless router's listing of active connections.

  • The computer is unable to connect to the printer over the network. Test connectivity with ping and/or EpsonNet.

  • The IP address of the adapter has changed. Check IP settings.

  • IP address setting is not correct. Confirm that the IP address assigned by the network is set for the wireless adapter.

  • Subnet mask setting is not correct. Confirm that the subnet mask assigned by the network is set for the wireless adapter.

  • The IP address is set redundantly. When the same IP address is used for more than one device in the network, communication is not possible. Confirm the settings for the other devices. The same default IP address is set for all wireless adapter units as the factory setting. Do not use more than one printer with the wireless adapter on the same network without changing the IP address.

  • The Epson printer driver has not been installed for the wireless adapter and printer in use.

  • The network mode is not correct. If the computer is in the AdHoc mode, the wireless adapter must be in the AdHoc mode. If the computer is in the Infrastructure mode, the wireless adapter must be in the Infrastructure mode.

  • The network name (SSID) is not correct. In the AdHoc mode, set the same value for the names of all PCs in the network and the network name (SSID) for the wireless adapter. In the Infrastructure mode, set the same value for the network name (SSID) as the name of the host computer in the network. When the network authentication is set, set it to the same setting as that of the host computer.

  • WEP key setting is not correct. If setting is not possible, initialize the wireless adapter. Install the wireless adapter in the TM printer, turn the power on, and press the Mode button of the wireless adapter for more than three seconds to re-initialize the wireless adapter.

  • Channel setting is not correct. In the AdHoc mode, communication is not possible when different channels are set for the computer and the wireless adapter. Set the same channel for both of them.

Wireless Problems

The wireless adapter is out of the wireless communication range.

  • Move the wireless adapter near the access point or the computer.

  • When EpsonNet is installed on the network computer, you can measure the strength of the signal.

The Information-Signal Condition of the EpsonNet on the network computer is “No Connection.”

  • See The Information-Signal Condition of the EpsonNet is “No Connection.” in the EpsonNet utility

There is interference with another network.

  • When there are more than one wireless LAN networks on the same floor and the same channel is used, interference occurs. When the channels are close to each other, interference may occur. In this case, the channel setting needs to be changed on one device.

No longer prints

  • The TM printer is turned off. Turn on the TM printer. Confirm the connection of the power supply unit or the voltage of the commercial power.

  •  The TM printer is offline. Turn the TM printer online.

  •  The ERROR LED of the TM printer is on or flashing. Remove the error cause.

  •  The printing port of the driver on the computer side is not specified correctly. Confirm the driver setting on the computer side.

  •  The wireless adapter is out of the wireless communication range or Wi-Fi is turned off. Move the wireless adapter near the access point or computer.

  •  The wireless LAN setting is not correct. Confirm that the wireless LAN setting for the wireless adapter and the settings for the access point and computer are correct.

  • The Wi-Fi password had changed and needs to be reset on the printer.

 Printing is slow

  • The strength of the signal is weak. When the strength of the signal is weak, the communication speed goes down. Confirm the Information-Signal Condition of the EpsonNet. When it is “Poor,” move the wireless adapter closer to the access point or computer.  When EpsonNet is not installed on the network computer, you cannot measure the strength of the signal, so just move the wireless adapter closer to the access point or computer.

  • There are problems with the computer or network. Printing speed may go down due to problems with the network system or applications.

More Information

Epson Printers Epson Interfaces Support Information
Wireless Printers

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