Connecting the Mercury 115F meter to Wi-Fi: Complete instructions with photos and tips

Electricity meter Mercury 115F With Wi-Fi support, you can remotely read meter readings, monitor energy consumption via a mobile app, and even integrate into systems smart homeHowever, many users encounter difficulties when first connecting: the router may not detect the meter, the app may return an authentication error, or data may be delayed. In this article— step-by-step instructions taking into account all the nuances: from equipment selection to security settings.

We'll figure it out three official methods connection (via a Wi-Fi module, PLC adapter, and the Energomera cloud service), and we'll also explain how to avoid common errors that cause the meter to refuse to connect to the network. If you've already tried setting up a connection and received an error ERR_CONN or NO_LINK — the article contains a section with solutions to these problems.

⚡ Important: Connecting the meter to Wi-Fi does not replace sealing or eliminate the need to submit monthly readings to the energy company. Remote access is additional function, and not a replacement for standard accounting procedures.

1. Which Mercury 115F models support Wi-Fi?

Not all modifications Mercury 115F Equipped with a wireless communication module. To avoid wasting time, check the markings on the meter body:

• 🔹 Mercury 115.01F — basic model without Wi-Fi. Connection to the network is only possible via an external PLC adapter (more on this below).
• 🔹 Mercury 115.02F - supports PLC (data transmission via electrical wiring) and optional Wi-Fi via an external module Mercury MSWiFi.
• 🔹 Mercury 115.03F — the most “advanced” version with built-in Wi-Fi moduleIt is the easiest to connect to a home network.

If there is an inscription on the front panel of the meter Wi-Fi 2.4 GHz or an antenna logo—your model supports direct connection. If not, you'll need to purchase an adapter (costing from 1,500 rubles in 2026).

⚠️ Attention: In some regions, energy companies block remote access to meters via Wi-Fi if they are not certified to transmit data to the State Information System for Housing and Public Utilities. Check with your energy supplier. before purchasing equipment.

2. What do you need to connect?

Before you begin setting up, please prepare:

Mercury 115.03F meter (or 115.02F + MSWiFi module)

A router that supports 2.4 GHz (5 GHz is not suitable!)

Mobile device (smartphone/tablet) with Android or iOS

Mercury Monitoring app (download from the App Store/Google Play)

Screwdriver to remove the meter cover (if needed)

Logins and passwords for your personal account on the Energomera website (for cloud connection)

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The key point is - the router must operate in the 2.4 GHz range. Counters Mercury Do not support 5 GHz networks. If your router is dual-band, make sure the 2.4 GHz network is enabled and has a separate name (SSID). Optimal router settings:

If your router does not support WPA2 or only works at 5 GHz, you will have to buy an inexpensive model (for example, TP-Link TL-WR840N or Xiaomi Mi Router 4C).

3. Method 1: Connecting via the built-in Wi-Fi module

This method is suitable for models Mercury 115.03F or 115.02F with MSWiFi moduleThis instruction is relevant for flashing the version counter. 1.05.12 and higher (you can check the version in the mobile application).

Step 1. Activating Wi-Fi on the meter

1. Press and hold the button OK on the front panel of the meter for 5 seconds until the indicator lights up Wi-Fi.
2. The counter will create its own network with the name Merury_XXXXXX (where XXXXXX are the last 6 digits of the serial number).
3. Connect to this network from your smartphone. The default password is 12345678 (if it doesn’t work, see the sticker on the meter body).

Step 2: Setting up your home network connection

1. Open the Mercury Monitoring app and select Add device → Wi-Fi counter.
2. Enter your home network details:
   • 📶 SSID — the name of your Wi-Fi network (case-sensitive!)
   • 🔑 Password - security key
   • 📡 Security type — choose WPA2-PSK

Click SaveThe meter will reboot and connect to your router (this may take up to 2 minutes).

Step 3. Checking the connection

After successful connection, the status will appear in the application Online, and the green indicator on the meter will light up Wi-Fi. If the status Offline:

• 🔄 Restart the meter (disconnect power for 10 seconds).
• 📵 Check if your router is blocking new devices from connecting (settings) MAC filter).
• 📶 Make sure that the Wi-Fi signal at the location where the meter is installed is not weaker -70 dBm (check with the app) Wi-Fi Analyzer).

⚠️ Attention: If the meter is connected to Wi-Fi but the data in the app isn't updating, check the time settings on the meter. If the time is more than 5 minutes off from the actual time, data transmission will be blocked.

4. Method 2: Connecting via a PLC adapter (for models without Wi-Fi)

If your Mercury 115F does not have Wi-Fi, but it does support PLC (Power Line Communication), you can use an adapter Mercury MSWiFi or universal PLC modem (For example, TP-Link AV600). This method transmits data through electrical wiring and then converts it into Wi-Fi.

What you will need:

• 🔌 PLC adapter (compatible with the protocol PRIME 1.4 or G3-PLC).
• 📶 Wi-Fi router (any, even without 2.4 GHz, since the connection is via wires).
• 🔧 Screwdriver for connecting the adapter to the meter.

Step 1. Connecting the PLC adapter

1. Turn off the power to the meter (turn off the circuit breaker in the panel).
2. Remove the meter cover and connect the PLC adapter to the contacts A+ And B- (see diagram in adapter instructions).
3. Plug the second PLC adapter into a power outlet near the router and connect them with a cable. Ethernet.
4. Turn on the power. Indicators PLC And ETH should be green.

Step 2: Setting up the network in the app

In the Mercury Monitoring app, select Add device → PLC counter and follow the instructions. The system will automatically detect the adapter and sync your data. If the connection fails:

• 🔌 Check that both PLC adapters are connected to the same phase of the power supply.
• 🔄 Restart the adapters (unplug them for 30 seconds).
• 📡 Make sure there are no interference filters in the panel (they can block the PLC signal).

What to do if the PLC adapter is not detected?

If the adapter does not appear in the app, try:

1. Connect it directly to the PC via Ethernet and check the connection (it should receive an IP via DHCP).

2. Update the adapter firmware using the manufacturer's utility (for example, PLC Tool for Mercury devices).

3. Check the integrity of the electrical wiring - damaged wires can interrupt the signal.

5. Method 3: Cloud connection via the Energomera service

This method is suitable for all models. Mercury 115F, but requires registration in the system Energomera and availability Internet gateway (For example, Mercury 230 or 234). Data from the meter is transmitted through a gateway to the cloud, and you access it through a web portal or mobile app.

Step 1. Register in the system

1. Go to the website lk.energomera.ru and create an account.
2. In your personal account, select Add a metering device and enter the serial number of the meter (located on the seal).
3. Activate the "Remote meter reading collection" service (this may be a paid service - check the tariff with your energy supplier).

Step 2. Connecting the gateway

Gateway (eg. Mercury 230) connects to the meter via interface RS-485 or PLC, and to the Internet - through Ethernet or 4G modem. Setting:

1. Connect the gateway to the meter according to the diagram in the instructions.
2. Connect the gateway to the router with a cable Ethernet.
3. In the gateway web interface (usually available at 192.168.1.1) please provide details of your Energomera network.

Step 3. Data verification

After synchronization (which may take up to 24 hours), meter readings will be displayed in your personal account. If the data doesn't appear:

• 🔄 Check that the gateway has internet access (ping to lk.energomera.ru must pass).
• 📝 Make sure that the meter serial number is entered correctly.
• 📅 Wait for the next data transfer cycle (usually once a day at 00:00).

⚠️ Attention: Some energy supply companies block data transfer via the Energomera cloud if the meter has not been verified or is not registered in the State Information System for Housing and Public Utilities. Check this in advance.

6. Typical mistakes and their solutions

Even with proper setup, glitches can still occur. Let's look at the most common ones:

If none of the solutions helped, Contact Energomera support with error logs (they can be exported in the Mercury Monitoring app in the Diagnostics section).

7. Security settings: how to protect meter data?

Connecting your meter to Wi-Fi exposes potential risks to your electricity consumption data. To minimize these risks:

• 🔒 Change the default password on the counter (in the appendix: Settings → Security → Access password). Use a combination of 12+ characters.
• 🌐 Disable remote access, if you don’t plan to use it constantly (in your router settings, block the meter’s IP address for external connections).
• 📡 Create a separate network for smart devices (guest network with limited access to local resources).
• 🔄 Update your firmware regularly counter and PLC adapter (via the official Energomera software).

If you use the Energomera cloud service, enable two-factor authentication in your personal account. This will protect your data even if your password is compromised.

8. Integration with smart home systems

Counter Mercury 115F can be connected to Apple HomeKit, Google Home or Yandex Alice through intermediate services such as Home Assistant or IOBrokerTo do this:

Step 1: Set up Home Assistant

1. Install Home Assistant to Raspberry Pi or another server.
2. Add integration Merury AM through HACS (add-ons manager).
3. In the configuration file configuration.yaml Please specify the IP address of the counter and access details:

   mercury_am:
   host: 192.168.1.100
   port: 10001
   password: your_password

Step 2: Connecting to Voice Assistants

After adding the counter in Home Assistant:

• 🎤 For Alice's: Use the Smart Home skill and link your account Home Assistant Cloud.
• 🍎 For HomeKit: enable integration HomeKit Controller in the Home Assistant settings.
• 🤖 For Google Home: connect your account via Google Home app (section “Works with Google”).

Now you can use your voice to query current power consumption or set up automations (for example, turning off non-critical devices when the power limit is exceeded).

⚠️ Attention: When integrating with third-party systems (such as Home Assistant), energy consumption data may be transmitted to external servers. If this is a concern for your privacy, use only the official Energomera software.

FAQ: Answers to Frequently Asked Questions

Is it possible to connect the Mercury 115F to Wi-Fi without a router?

No, the meter cannot operate in this mode. Ad-Hoc (direct connection to a smartphone). It requires a router with a 2.4 GHz network. An alternative is to use 4G router (For example, Huawei B315) or a smartphone's mobile hotspot (but this is inconvenient for constant use).

The meter is connected to Wi-Fi, but the data in the app isn't updating. What should I do?

The reasons may be as follows:

1. Communication breakdown: check the Wi-Fi signal at the place where the meter is installed (it should not be weaker -70 dBm).
2. Time Glitch: synchronize the counter clock with the server (in the application settings).
3. Port blockingOpen ports on your router. 10001 And 8080 for the IP address of the counter.
4. Server error: wait for the data to update (sometimes delay up to 6 hours).

If the problem is not resolved, please contact Energomera support with error logs (see the Diagnostics section in the app).

How do I reset the Wi-Fi settings on my meter?

To reset network settings:

1. Press and hold the button OK on the counter for 10 seconds until the indicator flashes Wi-Fi.
2. The meter will create its own network Merury_XXXXXX with default password (12345678).
3. Please connect to this network and try the setup again.

Attention: The reset does not affect the meter readings, but may interrupt the transmission of data to the energy supplier (if cloud synchronization is used).

Is it possible to connect the Mercury 115F to multiple Wi-Fi networks?

No, the meter only remembers one network. If you want to switch between networks (for example, at home and at the dacha), you'll have to reconfigure the connection through the app each time. An alternative is to use PLC adapter, which is not tied to a specific Wi-Fi network.

Do I need to pay for remote data transfer?

Connecting the meter to Wi-Fi is free, but some energy companies charge a fee for the "Remote Reading Collection" service (ranging from 50 to 200 rubles/month in 2026). Check the tariff in your region. There may also be paid plans for access to advanced analytics in the Energomera app.