Why Doesn’t The Beacon Achieve The Specified Range?

The distance that a beacon can transmit is shown in the specification tab for each beacon. This is the maximum range specified by the manufacturer at maximum power under ideal conditions.

Here are some tips if the range is less than expected:

  • Make sure the beacon is operating in normal rather than configuration or connectable mode. Some beacons transmit differently or only for a limited time when they are in connectable mode. For example, with AnkhMaway beacons, make sure the mode has been set to ‘On’ either in the configuration app settings or via service/characteristic parameters.
  • Make sure the beacon is set to 0dBm transmit power (or higher) rather than a negative value that indicates the beacon is to transmit with reduced power.
  • Re-orient the beacon. Most beacons have antennas on the printed circuit board that have differing transmission characteristics depending on their orientation to the observer and whether they are shielded by other components such as the battery. Experiment with different orientations in each of the three dimensions.
  • Try a different observing device (phone). Different phones have different receiving characteristics.
  • Try at a different place. In rare circumstances, the area might be congested with 2.4GHz interference from other beacons, WiFi or other equipment. The area might have particular radio frequency (RF) blocking or reflective qualities.
  • If you can, try a different beacon of the same model to isolate whether it’s a faulty beacon.

The maximum specified range is rarely achieved for any beacon although there have been a cases where we have found beacons to be better than the specification.

All manufacturers, not just those whose beacons we sell, tend to specify the optimum range, outdoors, with no radio interference. You will experience reduced range indoors where there are radio reflections and obstacles. If you need a long range under all circumstances then we recommend you over-specify the beacon range and perhaps look at beacons with an ultra-long range.

How the Range Varies with Beacon Orientation

Most people imagine Bluetooth beacons transmit equally in all directions. However, this isn’t usually true. The 2.4 GHz frequency that beacons use is easily blocked or affected (through electronic resonance) by items such as the casing, the battery and even the printed circuit board itself. Also, the design of the antenna, that’s usually etched onto the printed circuit board, causes the transmission to vary depending on the direction.

antenna

Printed Circuit Board (PCB) Antenna

The above 2D design leads to different radiation depending on whether you are viewing face on, sideways or end on. The following diagram from a very informative Cypress article (pdf) demonstrates how the radiation pattern can vary in the x y and z planes:

antennaradiation


In practice, it’s best to perform tests to assess how the beacon radiation changes with beacon orientation. You can do this by measuring the change in RSSI as you orientate the beacon. You can measure the RSSI using an app such as nRF Connect.

For example, with the long 300m range iB003N-PA, we determined experimentally that the best range was when the non-battery face of the beacon was facing the observer.

iB003N-PA – Strongest signal for us was downwards in this photo

However, this was for our particular scenario. How and where the beacon is mounted can also affect transmission and hence range.

So, the next time you are testing the range or installing beacons, take some time to assess how the beacon orientation might be affecting the range.

New Long Range USB Beacon

We have the FSC-BP101 in stock. The stand out feature of this beacon is that it provides a range up to 300m without the need for an external dipole antenna.

FSC-BP101

This beacon supports up to ten advertising slots that can be iBeacon, Eddystone-UID, Eddystone-URL or AltBeacon.

USB beacons are particularly suited for use as a mains powered beacon where it can be inserted into a spare USB slot or into a USB mains adapter.

View USB beacons

USB Beacons for Fixed Installations

Beacons are often placed in shops, offices and other buildings for detection in smartphone apps. Battery powered beacons last from months to years depending on the size of the battery and the transmission power (adjustable). The compromise between battery life and physical range can be avoided if USB beacons are used instead.

USB beacons are powered from an available wallsocket, laptop, desktop or other standard USB socket. Alternatively, they can be powered using an inexpensive mains charger used to charge a smartphone or other device. Powering from the mains allows the beacon to be permanently set to full power with no worry about checking or changing the battery.

The use of mains power also allows for use of specialist beacons that output the maximium legally allowed (Class 1) power that wouldn’t be feasible using battery power.

The FSC-BP109 can be received up to 1000m on Android and 4000m on iOS.

View USB beacons

New Bluetooth Range Extender

Nordic Semiconductor, the manufacturer of the System on a Chip (SoC) inside most beacons, has announced a new Bluetooth Range Extender the nRF21540.

It’s an electronic component to be used at the SoC output to amplify the signal prior to being sent to the antenna. We expect this to be included in some future long range beacon designs. However, note that it uses more current (115 mA at +20 dBm) so is less suitable for use in coin-cell based battery powered designs.

Our ultra long range beacons already use RF amplifiers but from different component manufacturers. For example the iB003N-PA uses a RFAXIS X2401C chip to achieve up to 300m range. The FSC-BP109 also uses an output amplifier to reach up to 1000m on Android and 4000m on iOS but this beacon requires USB power.

New Moko H2 in Stock

We have the new Moko H2 in stock. In many ways it’s visually, mechanically and settings-wise similar to the Minew i7 with which it shares some DNA. It is essentially a less expensive i7.

It advertises iBeacon, is waterproof to IP67, uses the Nordic nRF52 for 5+ years battery life with default settings, has a side on/off switch and can reach up to 100m if you set the power to maximum.

New Minew E2 in Stock

We have the new Minew E2 in stock. It’s a waterproof beacon advertising iBeacon and Eddystone.

What’s special about this beacon is the 10+ year battery life that comes through using the power efficient Nordic nRF52 SoC and 4 AA batteries. The in-use battery life will depend on settings.

This beacon also has a power amplifier that provides for an exceptional range of up to 500m. However, as with any long range beacon, the maximum range is achieved only when there’s line of sight.

Bluetooth 5 Simultaneous Multiple PHY

If you have been following our posts on Bluetooth 5, you might be wondering how one Bluetooth device can communicate to many devices, some of which might be legancy Bluetooth 4.

There’s a new video from Nordic Semiconductor (who produce the System on a Chip – SoC – inside most beacons) where the new long range mode is used while connecting to up to 20 devices. These can be different PHYs meaning that different capabilities, for example high speed vs long range vs legacy) can be connected at the same time.

New Long Range 210L Beacon

We just received the 210L ultra-long 200m range beacon into stock.

Most beacons tend to have a range of 30m, 50m or 100m. The normal output is 0dBm but they can be boosted to +4dBm to achieve the maximum ranges. Read our article on Choosing the Transmitted Power for more information.

The 210L beacon transmits at +10dBM which is the maximum allowable for this class of Bluetooth 4 device. This is just over 3x the power of a beacon transmitting at 0dBm. Hence, there’s respective reduction in battery life.

View our ultra-long range beacons

Feasycom FSC-BP109 Back in Stock

We have the Feasycom FSC-BP109 long range beacon back in stock.

This Bluetooth Class 1, CE RED certified beacon transmits, iBeacon and Eddystone, between 1000m and 4000m depending on the receiving device.

There are new iOS and Android apps that allow up to 10 channels that can transmit anything: Eddystone-UID, Eddystone-URL, iBeacon or AltBeacon. You can still set up by sending AT commands through the laptop/desktop USB com port opening up the possibility of the advertising changing programmatically over time, for scenarios such as changing media displays.

This beacon is especially suitable for large open areas such as stadiums where it can replace 10s or 100s of beacons with shorter range.