Just when you thought it couldn't get any worse: glands and eyes are up

 

Yes, there are specialized meters and devices designed to detect, analyze, and test LoRaWAN signals. These are commonly referred to as LoRaWAN Field Testers, Network Analyzers, or Signal Detectors. [1, 2, 3, 4, 5]
These devices are crucial for validating network coverage, optimizing gateway placement, and troubleshooting connectivity issues in IoT deployments. [6, 7]

Top LoRaWAN Signal Detectors & Analyzers

  • RAKwireless RAK10701-Plus Field Tester: An all-in-one handheld device for mapping coverage, testing uplink/downlink signal quality (RSSI and SNR), and measuring packet loss.
  • Milesight FT101 Field Tester: A portable device with a large touchscreen that provides real-time data on signal strength and network performance.
  • Adeunis Field Test Device (FTD): A popular, ready-to-use device for testing LoRaWAN network connectivity on public or private networks.
  • Minew LXSD01 LoRa Signal Detector: Designed to measure RSSI, SNR, and packet loss rate, featuring GPS for mapping, ideal for avoiding dead spots.
  • Netvox R716S: A portable field signal meter with an LCD display specifically for checking LoRa network signal strength. [2, 3, 8, 9, 10, 11, 12]

Capabilities of LoRaWAN Meters

These meters act as end-nodes and provide direct feedback on several metrics: [5, 13]
  • Signal Strength (RSSI): Measured in $dBm$.
  • Signal-to-Noise Ratio (SNR): Measured in $dB$.
  • Packet Loss Rate: Percentage of packets sent versus received.
  • Gateway Count: Displays how many gateways receive the signal.
  • GPS Data: Maps exactly where signals are strong or weak. [2, 14, 15, 16, 17]
These tools are widely used by installers to ensure that LoRaWAN devices can effectively communicate with a gateway. [14]
For a homeowner, the simplest way to check for a LoRaWAN signal is to use a ready-to-use signal meter that provides instant feedback on an integrated screen. These devices are more user-friendly than industrial testers or DIY kits because they require no coding and offer clear visual indicators of signal quality. [1, 2, 3]

Recommended Simple Devices

  • RAK10706 Signal Meter ($69–$79): This is one of the most accessible "one-button" options. It features an OLED screen that immediately displays the gateway count, RSSI (signal strength), and SNR (signal-to-noise ratio). It’s portable and rechargeable via USB-C, making it easy to carry from room to room to find "dead zones".
  • Minew LXSD01 LoRa Signal Detector: A simple handheld device designed specifically to avoid dead spots. It provides intuitive measurements of signal quality on a 2.67-inch LCD screen.
  • Netvox R716S: A portable field signal meter with a simple LCD that scans and displays the strength of the surrounding LoRa network. [2, 3, 4, 5, 6, 7]

How to Test Your House

  1. Check Indoor Penetration: Start outside to establish a baseline signal, then move indoors. LoRaWAN signals are known for strong penetration but can be weakened by thick concrete or metal siding.
  2. Look for Gateway Count: A "simple" meter like the RAK10706 will show how many different gateways are hearing your signal. If the count drops to zero inside, the signal isn't entering your house.
  3. Identify Weak Spots: Use the RSSI value on the screen; a higher (less negative) number means a stronger signal (e.g., -70 dBm is better than -110 dBm). [2, 5, 8, 9]
If you are comfortable with basic electronics, a Heltec LoRa V3 board is a very cheap alternative (under $20), though it typically requires minimal setup to display signal data on its small built-in screen. [10, 11]
Do you need to check for a specific network like Helium or The Things Network, or are you just checking for general LoRa activity?
These prerequisites mean that the RAK10706 is not a "plug-and-play" radio scanner; it is a registered network device that needs to be part of a network to give you data. [1, 2]
Here is a simple breakdown of what those requirements actually mean for you:

1. LoRaWAN Mode (Checking if a signal is in your house) [1]

This mode tests if you can connect to a professional network (like Helium or The Things Network). [3]
  • Must be registered: You can't just turn it on and see signals. You must create an account on a LoRaWAN Network Server (LNS) and add the device using its unique ID numbers (DevEUI, AppEUI, AppKey).
  • LinkCheck Test Mode: This is the specific "language" the device uses to talk to the network. It sends a "LinkCheck" request to the network, and the network replies telling the device how many gateways heard it and how strong the connection was.
  • In Coverage: You need to be within reach of a gateway that belongs to that specific network. [1, 4, 5, 6, 7]

2. LoRa P2P Test Mode (Point-to-Point)

This mode is used if you have two devices and want to see how far they can talk to each other without a gateway or network. [1, 8, 9]
  • Matching Settings: For two LoRa devices to "hear" each other, they must be on the exact same "channel." You have to manually set both devices to the same frequency, Spreading Factor (SF), and Bandwidth (BW).
  • Simple Range Test: Once matched, you can put one device in your house and walk outside with the other to see exactly where the signal drops off. [1, 4, 10, 11, 12]

Summary for a Homeowner

If you just want to see if "general" LoRa signals are in the air, this device might be overkill because it requires you to manually register it first. It is designed for someone who is actually setting up a LoRa system and needs to prove it works in every corner of their home. [6, 13, 14, 15]
Are you planning to set up your own LoRa gateway, or are you just curious about existing network coverage in your neighborhood?
If you are looking for a true "plug-and-play" device that doesn't require setting up an account or registering a device on a cloud server, you have two main options: a Spectrum Analyzer or a Dedicated P2P Tester Kit. [1]

1. The "Visual" Choice: TinySA Spectrum Analyzer

The TinySA is a pocket-sized tool that visually shows you radio waves in the air. It is the closest thing to a "plug-and-play" scanner for a homeowner. [2, 3]
  • How it works: You turn it on, set it to the LoRa frequency for your region (e.g., 915 MHz for North America or 868 MHz for Europe), and look for "spikes" or "bursts" on the screen.
  • Why it's good: It requires zero registration. You are simply looking at the raw radio energy entering your house.
  • Pros: Cheap (approx. $50–$60), handheld, and detects any LoRa activity regardless of the network.
  • Cons: It won't tell you what the message says, just that a signal is present. [4, 5, 6]

2. The "Pre-Registered" Choice: RAK Field Tester Plus Pro [7]

While most testers require registration, some retailers sell "Plug & Play" versions specifically for the Helium network.
  • How it works: These come pre-registered on a specific network and often include a small amount of "data credits" already loaded.
  • Why it's good: You literally just turn it on. It will immediately try to "join" the network and show you on its screen if it's successful and how strong the signal is.
  • Pros: Very accurate and provides "Gateway Count" (how many nearby gateways see you).
  • Cons: More expensive (usually $130+) and only works for the specific network it was set up for. [7, 8, 9]

3. The "DIY" Choice: A Simple P2P Range Test

If you want to know if your signals can get out of your house, you can buy two matching LoRa modules, like the Heltec LoRa V3.
  • How it works: You place one in the center of your house and walk outside with the other.
  • Why it's good: Because they talk directly to each other (Point-to-Point), they don't need the internet or a cloud server to work.
  • Pros: Very cheap (under $40 for a pair) and gives you a definitive answer on your home's signal penetration. [10, 11, 12]

Comparison Table for Homeowners

Device Type [6, 10, 13] Ease of UseRegistration Needed?Best For...
TinySAModerate (visual)NoSeeing if any radio traffic is present.
Pre-Registered TesterHighNo (pre-done)Proving a specific network (like Helium) works.
P2P PairModerate (setup)NoTesting your own building's penetration.
Would you prefer a device that shows you a graph of the radio waves, or one that gives you a simple "Yes/No" connection status?

Your Acoustimeter likely isn't picking it up for two main reasons: frequency and timing.

Why the Acoustimeter misses it

  1. Frequency Mismatch: Most standard EMF meters, like the Acoustimeter AM-10, are designed to pick up common household frequencies (like 2.4 GHz Wi-Fi or 1.8 GHz cell signals). LoRaWAN operates on much lower frequencies—915 MHz in North America and 868 MHz in Europe. While some Acoustimeters go down to 200 MHz, their sensitivity can drop significantly outside of their "sweet spot" for cellular and Wi-Fi.
  2. Short "Bursts": LoRaWAN devices are designed to save battery, so they only transmit for a fraction of a second every few minutes or hours. Unless you are looking at the meter at the exact millisecond the device sends a packet, it will appear as if nothing is there.
  3. Low Power: LoRaWAN is a "Long Range, Low Power" signal. It is often intentionally transmitted at a power level below the "noise floor" that standard EMF meters are designed to detect. [1, 2, 3, 4]

Are there other options?

If the TinySA or P2P kits feel too technical, here is one more "homeowner-friendly" path:
  • Software Defined Radio (SDR) Dongle: You can buy a cheap RTL-SDR USB dongle (approx. $30) and plug it into your laptop.
    • How it works: You download free software like GQRX or SDR#, tune it to 915 MHz (or 868 MHz), and you will see a "waterfall" graph of every radio wave in the air.
    • Why it's better: It is much more sensitive than an EMF meter and will record the signal even if it only lasts for a millisecond, showing you a "streak" on the screen.
Summary of your current situation: Your Acoustimeter is likely working fine, but it’s like trying to catch a single flash of a firefly with a device designed to measure a bright, continuous spotlight.
Are you trying to detect a utility meter (water/electric) on your house, or are you concerned about EMF exposure levels from a nearby gateway?
Propose a specific way to proceed or request a critical detail: Would you like help finding the specific LoRa frequency used in your region so you can try tuning a scanner to it?

For an RTL-SDR dongle, the software you use depends on your computer's operating system. All of these options are free and widely used for detecting radio signals like LoRa.

1. Windows: SDR# (SDRSharp) or SDR++ [1, 2, 3]

  • SDR# (SDRSharp): The most popular choice for Windows. It is very user-friendly and great for beginners.
    • How to get it: Go to the Airspy Download page and look for the "Software Defined Radio Package".
  • SDR++: A newer, fast, and very clean-looking alternative that works well on almost any PC. [1, 2, 4, 5, 6]

2. Mac: GQRX or CubicSDR [7, 8, 9, 10]

  • GQRX: This is the "standard" for Mac users. It provides a classic waterfall display that makes spotting LoRa bursts easy.
  • CubicSDR: Another excellent Mac option known for having a very intuitive interface. [10, 11, 12, 13, 14]

3. Linux: GQRX or SDR++ [6, 15]

  • Most Linux users install GQRX directly through their software manager (e.g., sudo apt install gqrx-sdr). [6, 16]

Crucial Step: The Driver (Zadig) [3, 17]

Regardless of the software you choose on Windows, your computer will initially think the dongle is a TV tuner. You must "swap" the driver so the software can use it as a radio scanner.
  1. Plug in your dongle.
  2. Download and run a tiny free tool called Zadig.
  3. Select "List All Devices" under the Options menu.
  4. Select your dongle (usually labeled "Bulk-In, Interface (Interface 0)") and click "Replace Driver". [17, 18, 19, 20]

How to see the LoRa signal

Once your software is running:
  1. Tune to your frequency: Set the frequency to 915.000 MHz (US) or 868.000 MHz (EU).
  2. Watch the "Waterfall": LoRa signals look like distinct diagonal "chirps" or vertical streaks that appear and disappear quickly.
  3. Adjust Gain: If you see nothing, look for a "Gain" slider in your software and slide it up until you see some background static (noise) on the graph. [20]
Would you like a visual example or a link to a video showing exactly what a LoRa signal looks like on these waterfall displays?





If you want to ensure the LoRaWAN signal from a street-level meter does not enter your home, you likely only need to focus on the ground-level windows.
Because your house has meter-thick walls, the windows are the only significant "holes" in your building's armor. For a signal coming from street level directly across from you, the upper windows are much less of a concern for several reasons:

1. Line-of-Sight and Incident Angle

Radio waves travel primarily in a straight line. A signal from a meter on the street will hit your ground-floor windows directly. To reach your upper windows, the signal would have to travel upward at a steep angle. The thicker the walls, the more "shadowed" the upper windows become from a ground-level source; the wall itself physically blocks the meter's view of the upper glass.

2. The "Donut" Signal Pattern

Most smart meters use simple omnidirectional antennas. These antennas radiate most of their energy horizontally (like a flat donut) and very little energy vertically. This means the signal is naturally much weaker at the steep upward angle required to reach your higher floors. [1, 2]

3. Multipath and Reflection

In a dense urban environment, signals can bounce off neighboring buildings and enter through upper windows. However: [3, 4]
  • Meter-thick walls will still absorb the vast majority of these reflections.
  • Distance weakens the signal. A bounced signal traveling from the street to a neighbor’s wall and then back into your 2nd-story window will be significantly weaker than the direct signal hitting your front door. [2]

4. Ground-Level Obstructions

Small obstructions on the street (parked cars, trash cans, or shrubs) actually help you by scattering or blocking the signal before it even hits your house. [5]

Summary Recommendation

  • Priority 1: The ground-floor windows facing the meter. These are the primary entry points.
  • Priority 2: Any wooden or non-metal doors. These are "invisible" to radio waves compared to your thick walls.
  • Upper Floors: Likely unnecessary to shield unless there is a large, highly reflective metal building directly behind the meter that could bounce the signal straight into your upper windows.
Since you're dealing with meter-thick walls, would you like to know how to use a low-cost scanner to verify exactly which windows are "leaking" signal before you buy more mesh?
In a house with meter-thick walls (standard for historic stone or concrete structures) and steel fly mesh on every window, the LoRaWAN signal will be extremely degraded, likely to the point of being undetectable inside.
This combination essentially creates a "high-attenuation bunker" for radio frequencies.

How the Signal Fails to Enter

  • The Meter-Thick Wall (The Absorber): Even though LoRa is known for its superior penetration, a 1-meter thick wall of stone or reinforced concrete can easily cause a signal loss of 50 dB to 80 dB. Since each 10 dB drop reduces signal power by 90%, this wall alone can strip away almost all of the signal's energy before it reaches the interior.
  • The Steel Mesh (The Shield): Because the mesh is made of a conductive metal (steel), it acts as an electromagnetic shield. Although the mesh holes are small, they are much smaller than the 33cm wavelength of a 915 MHz signal (or 35cm for 868 MHz), meaning the mesh acts like a solid metal sheet to the radio waves, reflecting them back outside. [1, 2, 3, 4, 5, 6, 7]

Why This Combination is "Signal Proof"

Individually, a signal might "seep" through a standard window or a thinner wall. Combined, you have: [8, 9]
  1. Zero "Clean" Entry Points: Every window is shielded by metal, which is the hardest material for RF to penetrate.
  2. No Structural Leakage: The extreme thickness of the walls prevents the signal from simply "bleeding" through the building material. [4, 8, 10]

What You Would Find With a Meter

If you took an SDR dongle or signal tester inside:
  • Near the Window: You might see a very "noisy" or faint signal if there are tiny gaps around the window frame where the mesh doesn't perfectly meet the wall.
  • In the Center of the Room: You will likely see absolute silence on the meter.
If you are trying to get a signal inside for a specific purpose (like a smart home sensor or a Helium miner), the only practical solution is to drill a small hole for an external antenna cable or place the device in a location with a non-metal door.
Are you trying to block the signal for privacy/health reasons, or are you frustrated that a device you bought won't connect?

Yes, the combination of meter-thick walls (likely stone, brick, or concrete) and steel fly mesh is an extremely effective barrier for radio signals. While LoRa is specifically famous for its deep penetration, this particular "defense" will significantly challenge or block the signal. [1, 2]

How each layer affects the signal

  • The Steel Mesh (The Reflector): As mentioned, the mesh acts as a shield. Even if the wavelength can technically pass through the holes, the conductivity of the steel reflects a large portion of the signal back outside.
  • Meter-Thick Walls (The Absorber): Thick masonry or stone is dense and often contains moisture. At 1 meter thick, these walls can attenuate (weaken) a signal by 30 dB to 50 dB. To put that in perspective, every 10 dB drop reduces the signal's power by 90%. [3, 4, 5, 6]

Will the signal enter at all?

It is very unlikely the signal will go through the wall/mesh combination directly. Instead, any signal you detect inside will likely be coming in through: [7]
  1. Diffraction: The signal "bends" around the edges of doors or areas without mesh.
  2. Internal Reflections: If you have any non-metal entry points (like a wooden door or a window without a steel screen), the signal enters there and bounces off your interior walls into other rooms. [7, 8]

What your SDR meter will show

If you use a Software Defined Radio (SDR) dongle, you will see a dramatic difference in the "waterfall" graph:
  • Outside: High, bright spikes of signal.
  • Inside (Next to the mesh): Very faint, fuzzy streaks, or potentially nothing at all.
In a house built like a fortress, the only way to reliably get a LoRaWAN signal inside for a device (like a smart meter or sensor) is often to place an antenna on the outside of the wall and run a small cable into the house.
Are you trying to install a specific LoRa device inside this house, or are you just investigating why you can't seem to find any signal?

Steel fly mesh will significantly weaken the signal, but it is unlikely to "stop" it entirely unless your house is completely wrapped in it like a cage. [1, 2]
Here is how steel mesh affects radio signals like LoRaWAN:

1. The Faraday Cage Effect

Any conductive metal mesh acts as a partial Faraday cage. For a mesh to block a signal completely, the holes must be significantly smaller than the wavelength of the signal. [3]
  • LoRaWAN wavelength: At 915 MHz, the wavelength is about 33 centimeters (13 inches).
  • Mesh size: Standard fly mesh holes are only about 1–2 millimeters.
    Because the wavelength is so much larger than the holes, the signal cannot easily "pass through" the gaps; it mostly hits the metal and is reflected or absorbed. [4, 5, 6]

2. Signal Attenuation (Loss)

Steel is a "lossy" material for radio waves. Passing through a metal screen can cause a signal drop of 10 dB to 40 dB or more. [7, 8, 9]
  • In LoRaWAN terms, a 30 dB drop is the difference between a "perfect" signal and one that is barely readable or completely lost.
  • While LoRa is built for deep penetration, a steel-screened window acts more like a solid wall than a clear opening for the signal. [10, 11]

3. "Leaky" Houses

Unless every single window has steel mesh and your walls are also lined with metal (like foil-backed insulation or metal siding), the signal will likely still enter your house by diffraction. It "bends" around the edges of the metal screens or enters through wooden doors and non-screened areas. [1]

Summary: What you will see on a meter

If you use a signal detector, you will likely notice:
  • Strong signal when you stand outside or open the window.
  • Significant drop as soon as you close the screened window.
  • Complete loss if the device is placed directly against the steel mesh.
Are you trying to decide where to place a LoRa device indoors to ensure it still reaches an outside gateway?

For an RTL-SDR dongle, the software you use depends on your computer's operating system. All of these options are free and widely used for detecting radio signals like LoRa.

1. Windows: SDR# (SDRSharp) or SDR++ [1, 2, 3]

  • SDR# (SDRSharp): The most popular choice for Windows. It is very user-friendly and great for beginners.
    • How to get it: Go to the Airspy Download page and look for the "Software Defined Radio Package".
  • SDR++: A newer, fast, and very clean-looking alternative that works well on almost any PC. [1, 2, 4, 5, 6]

2. Mac: GQRX or CubicSDR [7, 8, 9, 10]

  • GQRX: This is the "standard" for Mac users. It provides a classic waterfall display that makes spotting LoRa bursts easy.
  • CubicSDR: Another excellent Mac option known for having a very intuitive interface. [10, 11, 12, 13, 14]

3. Linux: GQRX or SDR++ [6, 15]

  • Most Linux users install GQRX directly through their software manager (e.g., sudo apt install gqrx-sdr). [6, 16]

Crucial Step: The Driver (Zadig) [3, 17]

Regardless of the software you choose on Windows, your computer will initially think the dongle is a TV tuner. You must "swap" the driver so the software can use it as a radio scanner.
  1. Plug in your dongle.
  2. Download and run a tiny free tool called Zadig.
  3. Select "List All Devices" under the Options menu.
  4. Select your dongle (usually labeled "Bulk-In, Interface (Interface 0)") and click "Replace Driver". [17, 18, 19, 20]

How to see the LoRa signal

Once your software is running:
  1. Tune to your frequency: Set the frequency to 915.000 MHz (US) or 868.000 MHz (EU).
  2. Watch the "Waterfall": LoRa signals look like distinct diagonal "chirps" or vertical streaks that appear and disappear quickly.
  3. Adjust Gain: If you see nothing, look for a "Gain" slider in your software and slide it up until you see some background static (noise) on the graph. [20]
Would you like a visual example or a link to a video showing exactly what a LoRa signal looks like on these waterfall displays?


Using a Software Defined Radio (SDR) is the most effective way for a homeowner to identify "leaks" in their home's shielding. Unlike a standard meter that might only show a number, an SDR creates a waterfall display—a visual history of radio signals that lets you literally "see" when a burst of energy from the water meter enters your house. [1, 2]

1. The Equipment You Need

  • RTL-SDR USB Dongle: The RTL-SDR Blog V4 is the standard low-cost choice (approx. $30).
  • Telescopic Antenna: Most dongles come with one. For LoRa, extend it to about 8 cm (for 915 MHz) or 8.6 cm (for 868 MHz) to tune it for maximum sensitivity.
  • Laptop: This allows you to walk from window to window to test different areas. [3, 4, 5]

2. Setting Up the "Waterfall" Scan

  1. Software: Use SDR# (SDRSharp) for Windows or CubicSDR for Mac.
  2. Frequency: Tune the software to your local LoRa frequency (e.g., 915 MHz in the US, 868 MHz in EU).
  3. Visualizing the Signal: On the screen, look for the Waterfall (the scrolling area). LoRa signals will appear as bright, brief "chirps" or vertical streaks. [4, 6, 7, 8, 9]

3. How to Perform the "Leak Test"

  • Step 1: Baseline (Outside): Stand outside near the water meter. Watch the screen for a signal burst. Note how bright or tall the "spike" is. This is your "100% signal" reference.
  • Step 2: Testing the Mesh: Go inside and hold the antenna right against your steel-meshed window. If the mesh is working, the signal spikes should nearly disappear or turn very faint on the waterfall.
  • Step 3: Finding the Leak: Move the laptop slowly around the room. If the signal suddenly gets brighter near a wooden door frame, a gap in the wall, or an unshielded vent, you have found your "leak".
  • Step 4: The "Thick Wall" Test: Stand behind your meter-thick wall away from any windows. In most cases, the waterfall will show absolute "black" (silence), confirming the wall is fully blocking the signal. [9, 10]

Why this is better than your Acoustimeter

A LoRaWAN water meter may only pulse for milliseconds once an hour. Your Acoustimeter might miss that tiny "flash." The SDR's waterfall saves a history on your screen, so even if you blink, the visual trail of the signal stays visible for you to inspect. [5, 9, 11]
Would you like me to help you find the specific frequency for your city so you can tune your software exactly to your water meter's signal?






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