![]() However, increasing the transmit power increases the power consumption of your device.īluetooth ® technology supports transmit powers from -20 dBm (0.01 mW) to +20 dBm (100 mW). The higher the transmit power, the more likely the signal can be heard at longer distances, and the longer the effective range. ![]() The louder you speak, the farther away someone can hear you, but the more energy it takes.Ĭhoosing a transmit power level is a design tradeoff between range and power consumption. Think of transmit power like the volume of your voice. In addition, the 2.4 GHz band is available worldwide, making it a true standard for low-power wireless connectivity. As a result, selecting a radio spectrum comes with tradeoffs between range and data rate.īluetooth ® technology uses the 2.4 GHz ISM spectrum band (2400 to 2483.5 MHz), which enables a good balance between range and throughput. However, the lower the frequency, the lower the data rate it can support. The lower the frequency, the longer the range. Radio spectrum stretches from 30 Hz to 300 GHz. ![]() When determining signal range and reliability at greater distances, several factors need to be considered. Bluetooth has the flexibility to be as precise as less than a meter or to reliably connect devices more than a kilometer apart. While the most well-known Bluetooth use cases, such as audio streaming and wearables, are built with short-range connectivity in mind, this is not because of an inherent limit to the effective range of the technology. A fit-for-purpose solution, Bluetooth ® technology allows developers to create wireless innovations that best meet the needs of their target use case. ![]()
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