Connecting Wi-Fi to the Mercury 115F Electricity Meter: Complete Instructions with Photos and Tips

Counter Mercury 115F — one of the first electricity metering devices in Russia that supports wireless data transmission via the protocol Wi-FiThis allows for remote readings and integration of the device into systems. smart home or transmit data directly to the service provider. However, connection requires precise adherence to the instructions: errors during setup can lead to connection loss or incorrect meter operation.

In this article you will find step-by-step guide With illustrations of key steps, an analysis of typical errors (for example, why the meter doesn't detect the network or refuses to connect), and tips for signal optimization. We've taken into account the nuances of firmware from different years of release and the specifics of working with popular routers (TP-Link, Keenetic, ASUS). If you've never set up one before IoT devices — Don't worry: the instructions are tailored for beginners, but also contain technical details for experienced users.

Before you begin, check: your Mercury 115F must have a module Wi-Fi (designation 115F.XX.W (See the labeling). If there is no "Wi-Fi" label or antenna symbol on the device, connection is impossible. Also, make sure your router supports the standard. 802.11 b/g/n on frequency 2.4 GHz (the counter does not work with 5 GHz).

1. Preparing for connection: what you will need

Before setting up, gather all the necessary items. Without these components, the process may take longer or fail:

• 📋 Meter passport — the serial number, firmware version, and factory Wi-Fi settings (if any) are indicated there.
• 🔌 Power supply — the meter must be connected to a 220V network. Configuration is not possible when the power is off.
• 📶 Router with 2.4 GHz support - check in the settings that the network is working in the mode b/g/n (Not ax or ac-only).
• 📱 Smartphone/PC — to access the meter and router's web interface. It's recommended to disable mobile data on your phone.
• 🔧 Screwdriver - may be needed to remove the terminal block cover (if a reset is required).

Pay special attention location of the meterIf it's installed in a metal enclosure or behind a concrete wall, the Wi-Fi signal may be weakened. The optimal distance to the router is no more than 10 meters without obstructions. If the meter is further away, consider the option with repeater or Mesh system.

⚠️ Attention: Some energy supply companies block the ability to configure Wi-Fi on meters independently, requiring their specialists to do the work. Check this in your contract or in your personal account on the supplier's website.

2. Configuring the router to work with the meter

Counter Mercury 115F has specific Wi-Fi network requirements. If they aren't met, your device will either fail to connect or will constantly disconnect. Follow these steps:

1. Disable WPA3 security — the counter only supports WPA2-PSK (AES)In your router settings, select compatibility mode. WPA2/WPA3 or force install WPA2.
2. Set a fixed channel — automatic selection (Auto) may lead to breaks. Recommended channels: 1, 6 or 11 (they overlap the least with neighboring networks).
3. Disable the Client Isolation feature (or AP Isolation) - it blocks data exchange between devices on the same network.
4. Set a static IP for the counter — this will simplify access to its web interface. For example, bind the meter's MAC address to its IP address. 192.168.1.100.

Example of router settings TP-Link:

1. Go to Wireless → Wireless Settings.
2. Install Mode: 11bgn, Channel width: 20 MHz.
3. IN Protection → Security Settings select WPA2-Personal.
4. Save the settings and reboot the router.

How to find the MAC address of the meter?

The MAC address is located on the sticker on the back of the meter (format: 00:1A:2B:...). It can also be viewed in the meter's web interface after the first connection.

3. Connecting the meter to a Wi-Fi network: step-by-step instructions

Now we move on to the main stage—setting up the meter itself. The process varies depending on the firmware version, but the general procedure is the same. We'll look at the universal method in web interface (the most reliable way).

Reset the meter to factory settings (if configured previously) | Connect your PC/smartphone to the router's network | Disable VPN and firewalls | Device charge >50% (for phones)

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Step 1. Reset the meter to factory settings

If you have already tried to configure the meter before, reset it:

1. Turn off the power to the meter (turn off the circuit breaker for 10 seconds).
2. Turn on the power and within 5 seconds Press and hold the button on the front panel (if there is one) or short-circuit the contacts S1 And S2 (see diagram in the passport).
3. Wait until the Wi-Fi indicator starts blinking green (about 30 seconds).

Step 2. Connecting to the temporary meter network

After reset, the counter creates its own network with the type name Merury_XXXX (where XXXX are the last digits of the serial number). Connect to it:

• Default password: 12345678 or 87654321 (indicated in the passport).
• Once connected, open your browser and go to the address http://192.168.88.1.

Step 3: Configure Wi-Fi settings

In the counter's web interface:

1. Go to the section Settings → Wi-Fi.
2. Select mode Client (Not Access point!).
3. Enter your network name (SSID) and password.
4. Install Static IP (For example, 192.168.1.100) or leave DHCP.
5. Save the settings and wait for the reboot (until 2 minutes).

4. Checking the connection and diagnosing errors

After setup, you need to ensure the meter is working reliably on the network. Here's how to do it:

• 🔍 Ping test: Open Command Prompt (Win + R → cmd) and run the command:

  ping 192.168.1.100

  If the responses are received without loss, the connection is stable.

• 🌐 Access to the web interface: Try opening it http://192.168.1.100 in your browser. The counter control panel should load.
• 📡 Signal check: Find the section in the counter interface Wi-Fi statusThe signal level must not be lower than -70 dBm.

If there is no connection, use this table for diagnostics:

⚠️ Attention: If the meter connects to the network but does not transmit data to the energy supply company's personal account, check the settings DLMS/COSEM in the section Exchange protocolYou may be asked to provide the server address and port (check with your service provider).

5. Setting up data transfer to the energy supply company

One of the key functions of Wi-Fi in Mercury 115F — Automatic transmission of meter readings. To do this, you need to set up integration with your supplier's metering system. Here's the process:

1. Find out the server parameters — Contact your power supply company's support service or find instructions in your personal account. You will need:
   • Server address (eg. dlms.example.ru)
   • Port (usually 1025 or 4059)
   • Device ID (may be the same as the serial number)

Configure the DLMS protocol in the counter:

1. Go to Settings → Exchange Protocol → DLMS/COSEM.
2. Enter the server address, port and sending interval (recommended) Once a day).
3. Please specify Login And Password (if required).

Check the transfer log — in the section Logs → Data Transfer There should be records of successful sending.

If your utility company requires the use of SMS gateway To transfer data, you need to additionally configure the parameters in the meter GSM module (if installed). However, this is only relevant for modifications Mercury 115F.G.

What to do if data is not transferred?

1. Check if your router's firewall is blocking outgoing connections to the DLMS port.

2. Make sure that the time on the meter is synchronized with the NTP server (section Settings → Time).

3. Try to manually initiate the transfer via the button Test in the section DLMS.

6. Signal and security optimization

Even if the meter is connected, connection stability or security issues may arise over time. The following tips will help avoid them:

• 📶 Boost signal:
  • Use an external antenna for the router (if there is a connector).
  • Set up Roaming Assist on the router (helps with a weak signal).
  • Install the router at a height 1.5–2 meters from the floor.
• 🔒 Improve security:
  • Change the default password for the counter web interface (admin/admin or 1/1).
  • Turn it off WPS on the router - this protocol is vulnerable to hacking.
  • Set up MAC filtering, allowing connection only to the meter.
• ⚡ Energy Saving:
  • Turn it off Wi-Fi on the meter overnight if data transfer is not required.
  • Set the polling interval to no more than Once an hour.

If the meter is located in a weak signal area, consider the option with access point in bridge modeFor example, you can use an old device (e.g., TP-Link TL-WA850RE) to retransmit the network closer to the meter.

⚠️ Attention: Some counter firmware Mercury 115F (manufactured before 2022) have a vulnerability that allows remote reset. Update the firmware via the section System → Software Update, if a new version is available.

7. Updating the meter firmware (if necessary)

The manufacturer periodically releases updates for Mercury 115F, fixing connection errors or adding new features (such as support WPA3 in the future). To update the firmware:

1. Download the latest version from Incotex official website (Support section).
2. Unzip the archive and check that the file has the extension .bin.
3. Go to the counter web interface, section System → Software Update.
4. Download the file and wait for it to complete (do not turn off the power!).

After the update, the counter will reboot and all settings will be reset. reset to factory defaultsYou will need to reconfigure your Wi-Fi and DLMS settings.

FAQ: Frequently asked questions about connecting the Mercury 115F

Is it possible to connect the meter to Wi-Fi without a router, directly to the phone?

No, the counter Mercury 115F does not support the mode Wi-Fi Direct or connecting to a smartphone's hotspot. It only works as a client of the existing network. 2.4 GHz.

The meter connects to Wi-Fi but doesn't transmit data. What's the problem?

There are several reasons:

1. Incorrect settings DLMS/COSEM (check server address and port).
2. Blocking the router firewall (open the port) 1025 or 4059).
3. The time on the counter is not synchronized (adjust NTP).

How do I reset the password for the meter's web interface?

Perform a full reset of the meter to factory settings (see Step 1 in the "Connection" section). After resetting, the password will be 1 (for login 1) or admin (for login admin).

Can the meter be used with a Mesh system (such as Google Nest Wi-Fi)?summary>

Yes, but only if the Mesh system supports it. 2.4 GHz and compatibility mode with 802.11 b/g/n. Turn off the function. Band Steering (automatic switching between frequencies), since the counter does not work with 5 GHz.

What should I do if the meter doesn't turn on after updating the firmware?

This is a sign of a failed update. Try:

1. Turn off the power on 1 minute, then turn it on again.
2. If this doesn't help, contact the service center. Incotex With a purchase receipt. Self-repair will void the warranty.