Long Range: Over 1Km distance via BLE

1. How to use
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to make the communication distance longer?

In previous timings, radio transmit power played a crucial role in increasing the range of BLE products. With the introduction of Bluetooth modules based on Nordic solutions, users are able to obtain better communication protocols. The module supports BLE 4.2/5 protocol. Bluetooth version 5 provides long-range mode. The design of this long-range wireless module provides considerable power efficiency while achieving a coverage range of over 1Km.

In these devices, Wi-Fi and Bluetooth communicate through serial ports for transparent data transfer. The long-range module helps extend the range of the Bluetooth connection to experience enhanced positioning; it also enables robust communication in areas where users encounter obstacles with previous wireless devices. In addition, Long Range also supports transparent signaling.

2. Factors that affect the long-distance wireless module to achieve a range of more than 1 Km through BLE

Achieving a range of more than 1 Km via BLE depends on the surrounding environment, antenna and radio signal performance. Therefore, there are many factors that can affect the working of Bluetooth range. Typically, they are:


② Physical obstacles in the data transmission path

③ Receiver sensitivity

④Transmitter output power

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itself has limitations based on the use of modulation. Since the performance of the antenna and radio remains fairly static for a particular Bluetooth device, the surrounding environment varies widely. For example: people may get a range of up to 100 meters outdoors, which is a rare situation. In indoor Bluetooth positioning and navigation, obstacles such as concrete walls can reduce the strength of the radio signal. Therefore, the effective range is significantly reduced.

When creating a Bluetooth device, a manufacturer can choose to give it a better range. They can also move on by choosing the Bluetooth chip with the best receiver sensitivity. In addition, its output power should ensure that the device has a good antenna. But in some cases, users need to transmit data over hundreds and thousands of meters via Bluetooth technology. In this case, they use a different network to achieve a higher range of the bluetooth module.

3. Differences in the transmission distance of different Bluetooth protocol versions

It can be seen that there has been a great breakthrough in the communication distance when BLE 5.0 is developed. What changes have been made in BLE 5.0 to achieve such changes? The following improvements have been made in version 5 of the Bluetooth specification. In addition to this, it also brings improvisation, enabling better data transfer in longer distance areas. Additionally, all of these improvements are incorporated into designs designed to make the low-energy portion of Bluetooth more flexible:

① "Long Range" 125kbs or 500kbps modes allow users to enhance range at a relatively low data rate cost. Improved mode also increases the average current consumption.

② The "high speed" 2Mbps mode enables the user to increase the data rate or reduce the average current consumption, but at the expense of reduced range.

③ The advertisement extension function significantly improves the data throughput of broadcast applications (such as beacons) by up to 8 times.

④Maximum output power increased from +10 dBm to +20 dBm. It allows the use of a more powerful power amplifier, which further improves the range.

⑤ Added a new channel selection strategy (CSA2). It creates the possibility of coexisting more devices in the same environment without interfering with each other.

4. The specific application direction of Long Range

Long reach (coded PHY, 500/125 kb/s) mode provides higher data rates and modulation with higher signal levels. Also, with the long-range PHY option, there is a greater chance of achieving better range in BLE. The point here is that long-range functionality requires that both radios contain encoded PHY functionality. The data rates quoted above include packet overhead, other data, and headers. The purpose is to reduce the raw data rate and effectively enhance the user data range.

E104-BT5011A is a serial-to-BLE Bluetooth master-slave integrated module based on Bluetooth protocol version 5.1. It is small in size and low in power consumption. Designers use encoded PHY for long-distance mode in Bluetooth 5 version. Thanks to the introduction of coded PHY, Bluetooth connectivity provides I Km with long-range coverage of 50 - 70 m. The expansion of the range requires some hardware changes to the device.

To name a few, Bluetooth module designers have increased sensitivity levels on the receiver side. Sometimes even a remote Wi-Fi router can't connect wireless tools to enhance Wi-Fi range. Therefore, in order to achieve the best results, a world-class LBS solution provider, provides high-quality R&D positioning and wireless connectivity technology.

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