A modern retail outlet is unthinkable without stable and fast data exchange with the fiscal operator. Cash register equipment Mercury 185F has become the de facto standard for small businesses, but its initial configuration often raises questions for inexperienced users. Connecting via a wireless network Wi-Fi Eliminates unnecessary wires and allows you to place the cash register in any convenient location where there is a router signal.
The setup process requires careful attention, as the device's interface has its own unique features, and the drivers must be correctly installed on the host computer. In this article, we'll cover in detail how to properly activate the wireless module, enter network parameters, and test the connection to the central office. Important: For the Wi-Fi module to work on this cash register model, the corresponding option must be installed or the license key must be activated.
Before proceeding with the software, make sure your hardware is physically ready for operation. Having an antenna and the module itself in good working order are basic requirements; ignoring them will result in a waste of time. We'll cover both standard PC setup methods and using the utility. Tester for direct diagnosis.
Equipment preparation and check of completeness
The first step is a visual inspection of the device. Model Mercury 185F The device may come in various configurations, and not all of them come with a Wi-Fi adapter installed by default. Typically, the antenna connector is located on the back of the device, next to the USB and Ethernet ports. If you see a threaded connector but the antenna itself is not included, you'll need to purchase one separately or request one from the supplier.
After connecting the antenna, you need to turn on the cash register and go to the administrator menu. This often requires knowing the password, which by default may be set as 30 or 1, depending on the firmware version. Navigation is carried out using the arrow keys and the button IT (Enter). You need to find the section responsible for network settings.
Pay attention to the indicators on the case or screen. On some models, a special symbol lights up when wireless mode is activated. If, after turning on the cash register and connecting the antenna, the system doesn't respond to attempts to select Wi-Fi in the menu, the module may not be activated at the hardware level.
⚠️ Attention: Do not attempt to connect the antenna to the Ethernet or USB port. This may cause a short circuit and damage the controller. Use only the designated connector marked "WLAN" or with the antenna symbol.
Also, make sure your router is transmitting in the range supported by the cash register. Older models may only operate on the 2.4 GHz frequency, while modern routers often combine bands or use 5 GHz. Mercury It is critical that the encryption type is compatible.
Installing drivers and software
To manage your cash register from your computer, you'll need specialized software. The main tool is a program Mercury Tester or universal drivers KKT (Cash Register Equipment). Without the installed driver, the Windows operating system will not be able to properly interact with the device, even if the physical USB connection is correct.
Download software only from the manufacturer's official website or authorized distributors. Using third-party builds may result in unstable operation or security vulnerabilities in fiscal data. After downloading the archive, run the installer as administrator.
During the driver installation process, select the connection type. For the initial Wi-Fi setup, it's most convenient to use a USB cable to transfer the network settings to the cash register. Afterward, you can disconnect the cable. The driver will create a virtual COM port through which commands will be transmitted.
☑️ Check before setting up the network
After the drivers are successfully installed, open the Windows Device Manager and make sure that a new device appears in the "Ports (COM and LPT)" section, for example, Mercury USB or Virtual COM PortRemember the port number; you'll need it to configure the tester program.
Configuring network parameters using the Tester utility
Program Mercury Tester is the main tool for configuring the cash register. Launch the application and enter the port number you noted in the Device Manager in the port selection field. Click the connect button. If the connection is successful, device status messages will appear in the log.
To set up Wi-Fi, go to the "Network" or "Network Settings" tab (the name may differ in different software versions). Here you will need to select the connection type: Wi-FiNext, enter the SSID (your wireless network name) and password. Be careful when entering them: letter case is important, and spaces are not allowed.
In the IP addressing settings, it is most often recommended to leave the address obtained automatically (DHCP). This eliminates the need to manually enter the IP address, subnet mask, and gateway, which is especially important for small networks without static routing.
| Parameter | Description | Example of meaning |
|---|---|---|
| SSID | Router's wireless network name | MyShop_WiFi |
| Security | Data encryption type | WPA2-PSK |
| Password | Password for network access | SuperPass123 |
| IP Mode | IP address acquisition mode | DHCP (Auto) |
After entering all the data, click "Save" or "Save." The cash register may reboot to apply the new settings. You should see a message in the program log indicating a successful connection to the network.
What should I do if my cash register can't see the network?
If your network isn't listed, check to see if the SSID is hidden in your router settings. Mercury routers may not display hidden networks in search mode, so you often have to manually enter the network name (SSID) in the corresponding configuration field, even if the automatic search fails.
Working with the cash register menu
Sometimes it's more convenient or necessary to configure settings directly from the cash register keypad. To do this, enter programming mode. This is usually done with a key combination or through the administrator menu. Find the section Settings -> Net.
In the checkout menu, you'll see a list of available networks if automatic network search is enabled. Select the desired network from the list or enter its name manually if it's hidden. The system will then prompt you for a password. Use the arrow keys to navigate through the symbols and the Enter key to confirm.
After saving the settings in the cash register menu, we recommend performing a test report print or sending a test document to the fiscal data operator (OFD). This will confirm that not only the local connection to the router is established, but also that there is access to the global network.
- 📡 Make sure that the signal level displayed on the cash register screen is sufficient for stable operation.
- 🔒 Check if your router is blocking new devices by MAC address.
- 🔄 When changing the Wi-Fi password, you must update the settings at the checkout manually.
If your cash register shows a connection error, try rebooting your router. Sometimes cash registers with simple network stacks don't respond well to on-the-fly network parameter changes without a full reconnection.
Diagnosing and troubleshooting connection problems
The most common issue is that the cash register sees the network but fails to connect. This is often due to incompatible encryption protocols. Mercury 185F may not support the latest WPA3 security standards, so you should set the mode in the router settings for a guest network or a separate SSID WPA2-PSK (AES).
Another cause of problems is the frequency range. If your router operates in "Dual Band" mode (2.4 and 5 GHz simultaneously) with the same network name, the cash register may attempt to connect to the 5 GHz band, where it doesn't work. The solution is to separate the networks on the router by giving them different names, for example, Home_2.4 And Home_5, and connect the cash register to the first one.
⚠️ Attention: Router interfaces and cash register firmware versions may differ. If the menu items described here don't match, please refer to your specific router's documentation or update your cash register firmware to the latest version.
It's also worth checking the date and time settings at the checkout. If the time is significantly out of sync with the actual time, the secure connection protocols (TLS/SSL) used to communicate with the fiscal data operator (FDO) may block data transmission, creating the false impression of Wi-Fi issues.
Checking the connection with the OFD and fiscalization
The final step in setup is testing fiscal data transmission. Even if the Wi-Fi indicator is on, the cash register should successfully send receipts to the fiscal data operator. Go to Reports and select "Payment Status Report" or a similar item that displays the connection status with the fiscal data operator.
The report should indicate "Connected to OFD" or the status "Not sent: 0." If you see accumulated receipts, try running the "Send All" command. If the process is successful and the counter for unsent documents is reset, the setup was successful.
Connection stability is critical for compliance with Federal Law No. 54. Regularly check the cash register's event log. If you notice intermittent connection drops, the cash register may be in a poor reception area, and you should consider installing an additional repeater or moving the router closer to the cash register area.
Why doesn't the cash register see my Wi-Fi router?
The most common cause is the frequency range. Mercury 185F cash registers operate only in the 2.4 GHz band. If the router only broadcasts 5 GHz or uses the 802.11ax (Wi-Fi 6) standard in "only" mode, the cash register will not detect the network. You must enable support for legacy modes (b/g/n) in the 2.4 GHz band.
How do I reset my cash register's network settings?
To reset network settings, log in to administrator mode, find the "Network" section, and select "Reset settings" or "Factory network settings." You will then need to re-enter the SSID and password. In some cases, a full reset of the cash register helps, but this requires reprogramming the fiscal parameters.
Is it possible to connect the cash register via a smartphone (Hotspot)?
Technically, this is possible if the smartphone has a 2.4 GHz Wi-Fi connection. However, this is not recommended for continuous use, as if the phone's battery runs low, there's an incoming call, or the user switches to a mobile network, the connection to the fiscal data operator (OFD) will be interrupted, leading to a buildup of untransmitted fiscal documents.