Why Can't Classic Bluetooth Module Achieve Low Power Consumption?
The emergence of low-power bluetooth module has improved the shortcomings of classic bluetooth modules and has become a standard configuration for high-end smartphones. BLE module + smart home, make our life smarter.
Why can't classic Bluetooth module achieve low power consumption?
Let's look at the features of Bluetooth low energy module with the Bluetooth module manufacturer Joinet:
1: The lowest power consumption
To reduce power consumption, Bluetooth low energy devices spend most of their time in sleep mode. When activity occurs, the device automatically wakes up and sends a text message to the gateway, smartphone or PC. The maximum/peak power consumption does not exceed 15mA. Power consumption during use is reduced to one-tenth of that of traditional Bluetooth devices. In the application, a button battery can maintain stable operation for several years.
2: Stability, Security and Reliability
Bluetooth Low Energy technology uses the same Adaptive Frequency Hopping (AFH) technology as conventional Bluetooth technology, thus ensuring that Bluetooth Low Energy modules can maintain stable transmissions in "noisy" RF environments in residential, industrial and medical applications. To minimize the cost and power consumption of using AFH, Bluetooth Low Energy technology has reduced the number of channels from 79 1 MHz wide channels of conventional Bluetooth technology to 40 2 MHz wide channels.
3: Wireless Coexistence
Bluetooth technology uses the 2.4GHz ISM frequency band that does not require a license. With so many technologies sharing this airwave space, wireless performance suffers from error correction and retransmissions caused by interference (eg increased latency, reduced throughput, etc.). In demanding applications, interference can be reduced through frequency planning and special antenna design. Because both the traditional Bluetooth module and the Bluetooth low energy module use AFH, a technology that can minimize the interference of other radio technologies, the Bluetooth transmission has excellent stability and reliability.
4: Connection range
The modulation of Bluetooth low energy technology is slightly different from that of traditional Bluetooth technology. This different modulation enables a connection range of up to 300 meters at a wireless chipset of 10 dBm (Bluetooth Low Energy maximum power).
5: Ease of use and integration
A Bluetooth low energy piconet is typically based on a master device connected to multiple slave devices. In a piconet, all devices are either masters or slaves, but cannot be both masters and slaves at the same time. The master device controls the communication frequency of the slave device, and the slave device can only communicate according to the requirements of the master device. Compared with traditional Bluetooth technology, a new function added by Bluetooth low energy technology is the "broadcast" function. With this feature, a slave device can signal that it needs to send data to the master device.
Since the physical layer modulation and demodulation methods of classic Bluetooth and low-power Bluetooth are different, low-power Bluetooth devices and classic Bluetooth devices cannot communicate with each other. If the master device is a low-power Bluetooth device, the slave device must also be a low-power Bluetooth device; similarly, a classic Bluetooth slave device can only communicate with a classic Bluetooth master device.
Joinet, as a research and development and manufacturer of low-power Bluetooth modules, in addition to low-power Bluetooth modules, we also have corresponding solutions, such as: smart toothbrushes, networked water purifiers, etc. Welcome to consult!
