At the end of the day, a tool case is missing from a service van, and you want to know where it went. The Bluetooth beacon vs GPS tracker choice comes down to one question: is it enough to know the case was last seen near a particular receiver, or do you need its coordinates wherever it is? A beacon answers the first question, a GPS tracker the second. The beacon never works out its own position; it only announces its identity to receivers in radio range. A GPS tracker measures its position from satellites and reports it over a cellular network.
That choice drives cost, battery life and infrastructure. A beacon costs a fraction of a tracker, runs for years on a coin cell and needs no SIM card, but it is invisible whenever no receiver is nearby. The Teltonika EYE Beacon shows well how Bluetooth tracking really works, how far it reaches, how long the battery lasts and when combining both technologies pays off.
What is a Bluetooth beacon?
A Bluetooth beacon is a small radio transmitter that sends a short data packet at fixed intervals. It uses Bluetooth Low Energy (BLE), the power-saving flavor of Bluetooth that operates in the 2.4 GHz band. Each of these advertising packets is no larger than 31 bytes. The main payload is a unique identifier, and many models add the battery level or a calibrated transmit power. The beacon never opens a connection and has no idea who is listening.
Two formats have become the common language that receivers understand: iBeacon and Eddystone. An iBeacon ID consists of a 16-byte UUID plus two fields called major and minor, while an Eddystone ID is made up of a namespace and an instance ID. On configurable models, you choose the format in a smartphone app. What matters is that your receiver can actually decode the format you pick.
What a beacon lacks is just as important: no GNSS receiver, no cellular modem, no SIM card. It can neither determine its own position nor push data to the internet. A typical asset beacon is about the size of a matchbox, weighs around 20 grams and runs on a coin cell. The intelligence lives in the receiver and the software behind it.
How does Bluetooth beacon tracking work?
Strictly speaking, Bluetooth beacon tracking is an association, not a measurement. A receiver, such as a wall-mounted gateway or a vehicle tracker with Bluetooth, scans continuously for advertising packets. When it spots a known ID, it logs it with a timestamp and the measured signal strength and sends the record to a platform. The beacon’s location is borrowed from the receiver: if the gateway hangs in the warehouse, the case was in the warehouse. If the receiver sits in a vehicle with GPS, the case was wherever the vehicle was at that moment.
Signal strength is reported as RSSI (Received Signal Strength Indicator) and measured in dBm. As a rough indoor guide, Teltonika says −50 dBm corresponds to about one meter, −70 dBm to two to five meters and −80 dBm to five to ten meters. The manufacturer is also clear that these values vary a lot. Metal shelving, walls, people, reflections and the orientation of the beacon all shift the RSSI, often by more than the difference between two and five meters.
That is why RSSI works best for proximity, near versus far, not for distances accurate to the meter. A common mistake is to treat a single reading as a distance and trigger alerts from it. Rules based on several observations work much better, for example a moving average, or a requirement that a beacon must be received stronger than −70 dBm three times in a row before it counts as present.
The reverse matters just as much: a beacon that stops being reported is not necessarily gone. Packets get lost to obstructions, the receiver may scan only at intervals, or it may be offline itself, in which case every item associated with it seems to vanish at once. A last-seen timeout that matches the advertising interval prevents many false alarms.
With several fixed receivers, comparing their RSSI readings gives a rough idea of which part of a building a beacon is in, which is often good enough for zones such as receiving, an aisle or the workshop. Sub-meter indoor positioning, on the other hand, is hard to achieve with classic BLE beacons and calls for different methods and far more infrastructure.
Bluetooth vs GPS tracking: when is Bluetooth enough?
A GPS tracker works the other way around. It receives signals from navigation satellites, often Galileo or GLONASS as well as GPS, calculates its own position and sends it to a platform through a cellular modem. Under open sky, accuracy is typically a few meters. But it needs a view of the sky, a SIM card with a data plan and far more energy than a beacon, and inside buildings, parking garages or metal containers it often gets no usable position at all.
The table below puts the key differences side by side:
| Criterion | Bluetooth beacon | GPS tracker |
|---|---|---|
| What gets reported | ID and signal strength, to a nearby receiver | Its own coordinates, over cellular |
| Where the position comes from | The receiver that saw the beacon | Its own satellite fix |
| Indoors | Works where receivers are installed | Often limited |
| Coverage | A few dozen meters around each receiver | Anywhere with satellite reception and cellular service |
| Running costs | No SIM card for the beacon | Data plan per device |
| Power | Coin cell, several years | Rechargeable battery or vehicle power |
The comparison makes clear that the two technologies solve different problems. Bluetooth is enough whenever your question is tied to a known place: is the measuring instrument in the stockroom? Is the hammer drill in the van? Which reusable containers passed through the gate today? Because a beacon is inexpensive and needs no SIM, you can tag dozens or hundreds of items without paying for a data plan on each one.
Bluetooth is not enough when an item moves freely and you need its position even when none of your receivers is nearby. A stolen trailer, a container on a third-party carrier’s truck or construction equipment rented out between job sites stays invisible with a beacon until it reappears at one of your receivers. That calls for a standalone GPS tracker, with a higher cost per device plus regular charging or a permanent power connection.
What is the range of a Bluetooth beacon?
The range of a Bluetooth beacon depends on three things: the beacon’s transmit power, the sensitivity and antenna of the receiver, and everything in between. For the Teltonika EYE Beacon, the manufacturer specifies 80 meters. In its own tests with vehicle trackers, Teltonika reached 80 to 100 meters in an open field. Those are best-case figures with clear line of sight and a good receiver antenna.
In practice, usable range is usually much shorter. BLE operates at 2.4 GHz, a frequency at which water, and therefore the human body, absorbs a lot of the signal. Metal blocks or reflects it. A beacon inside a closed steel toolbox, behind the sheet metal of a vehicle cab or under a pallet of bottled drinks can be hard to pick up after just a few meters.
Many beacons let you adjust transmit power. On the EYE Beacon it ranges from −14 dBm to +8 dBm, with +2 dBm set at the factory. More power means more range but also higher battery drain. Sometimes shorter range is the goal: if a receiver in a van should detect only its own cargo and not the van next to it, low transmit power is the better choice.
Mounting matters too. A beacon on the outside of a plastic case radiates more freely than one tucked inside a metal enclosure or wedged between metal parts. Always test range on site, with the real load and in the spots where the items actually sit.
How long does a Bluetooth beacon battery last?
Battery life is one of a beacon’s biggest advantages over a GPS tracker, and it depends almost entirely on two settings: advertising interval and transmit power. The more often and more strongly the beacon transmits, the faster the coin cell drains. The EYE Beacon uses a CR2450 lithium cell of about 600 mAh. At +2 dBm, Teltonika quotes about two years at one packet per second, around eight years at the default five-second interval, and up to ten years at one packet every ten seconds.
A shorter interval does not automatically mean better detection; what matters is how quickly you need to notice a change. If a tool only has to be logged as “in the van” or “not in the van” at the end of the day, ten seconds is plenty. If a forklift carries a container past a gate receiver in a few seconds, a long interval can miss that brief encounter. The receiver plays a part too: if it scans only periodically, detection takes even longer.
Two points are often overlooked. First, the EYE Beacon’s battery cannot be replaced. When it is empty, you replace the beacon. For large deployments, plan for that swap from the start. Second, the manufacturer’s figures only apply to the stated settings and normal temperatures. Cold lowers the voltage of a coin cell, and the EYE Beacon’s operating range bottoms out at −20 °C (−4 °F). If you use beacons in cold rooms or outdoors in winter, expect shorter battery life.
For comparison, a battery-powered GPS tracker reporting several times a day typically lasts weeks to months, while a hardwired vehicle tracker simply runs on the vehicle’s electrical system.
What does the Teltonika EYE Beacon do?
The Teltonika EYE Beacon, model code BTSID1, is a pure identification beacon for items such as tools, containers, trailers or equipment. It broadcasts its ID over BLE in Eddystone or iBeacon format, together with its battery level. It does not measure temperature or movement. It is compact: 56.6 × 38 × 13 millimeters and about 19 grams. The housing is rated IP67 against dust and temporary immersion, which suits it to job sites, workshops and vehicles.
Two tabs with holes let you screw the beacon down or fasten it with a cable tie or cord; adhesive tape works too. Model, serial number, MAC address and a QR code are printed on the housing, which makes matching beacons to items during inventory easier. The IDs are assigned uniquely at the factory, so you never manage UUIDs yourself.
You configure the EYE Beacon with Teltonika’s EYE App on a smartphone. There you set transmit power, advertising interval and protocol, and you can update the firmware. This only works at short range over Bluetooth; remote configuration over the internet is not supported. One limitation affects iPhones: the EYE App on iOS does not show beacons set to iBeacon mode. Out of the box, the beacon broadcasts in Eddystone format.
On its own, the EYE Beacon provides no location at all. It needs a receiver that processes BLE beacons and a platform that displays the data. Teltonika trackers with Bluetooth detect EYE Beacons directly. Other devices that understand iBeacon or Eddystone should also pick it up, but you should confirm that with the manufacturer of your specific device.
Can you combine a GPS tracker with Bluetooth beacons?
Yes, and in many operations that is the best answer. A vehicle GPS tracker knows the vehicle’s position and has a cellular connection. If it also has Bluetooth, it can double as a beacon receiver. Every record it sends then contains its own coordinates plus the IDs and RSSI values of the beacons it has just seen. The tool case thus gets an indirect position: that of the vehicle in which it was last detected.
On Teltonika trackers, beacon data lands in a dedicated field of the regular position record. With current base firmware, a tracker can handle up to 100 beacons at once. If more are in range, the ones with the strongest RSSI are kept. Instead of entering every MAC address individually, you can filter by a name pattern so only your own beacons are logged, not every stray Bluetooth device in the parking lot.
Typical uses are tool checks in service vans, showing whether everything is on board before the vehicle leaves the yard, and matching trailers or swap bodies to the vehicle currently moving them. In both cases only one device carries the cost of a SIM card and GPS module, while the beacons stay inexpensive and low-maintenance.
Keep two limits in mind. The beacon’s position is only as fresh as its last sighting and only as accurate as the receiver’s position. If the case sits on the ground next to the vehicle instead of in the cargo area, the tracker still reports it as nearby. Also check in advance that your tracker, its firmware and your platform actually process beacon data. Bluetooth hardware in the tracker does not guarantee that on its own.
Where can you buy Bluetooth beacons?
Before you buy a beacon, be clear about what it has to answer. For presence at known places such as a warehouse, workshop or vehicle, a beacon with suitable receivers is enough; if the item must be findable far from your own infrastructure, you need a GPS tracker. Check that your receiver understands the beacon’s protocol, iBeacon or Eddystone, and that your platform processes IDs and RSSI values. Look at the ingress rating for outdoor or job-site use and at how the beacon can be fastened to the item. Set advertising interval and transmit power to match your application, and calculate battery life with those values rather than the maximum figure.
In the end, the Bluetooth beacon vs GPS tracker decision comes down to whether proximity to a receiver is enough or you need an independent position. If a beacon fits, you will find the Teltonika EYE Beacon and other BLE devices in our Bluetooth category.