Low-power design based on Bluetooth accelerometer: The accelerometer is a wireless sensor whose low-power operation maximizes the effective use time of the device. For optimum performance, power consumption and availability must be traded off based on the conditions in the design. In addition to choosing low-power devices, you can also design a power management scheme from the following aspects to minimize the power consumption of wireless temperature sensors.
Since the wireless temperature sensor is responsible for transmitting data to the control terminal, when to collect data and when to transmit data can be determined by the control terminal, which is very suitable for using sleep mode and breathing mode. For the purpose of power consumption, the control terminal is generally connected to a permanent power supply, and it is more appropriate for the terminal to be responsible for the overhead of power management. Taking the control terminal as the main device, the power management program is designed at the application control layer of the terminal, and the control terminal completes the work of device query, pairing, and chain establishment. When the wireless sensor is successfully paired with the control terminal and the RFCOMM connection is established, it enters the In sleep mode, and the master and slave devices still maintain the RFCOMM channel, but cannot send and receive data. In sleep mode, the beacon interval can be set to 15, and the current is about 1mA. When data transmission is required, it exits the sleep mode and enters the breathing mode, and sends data through the breathing time slot. The breathing interval can be set to 20~40ms. If the interval is too large, it will cause a noticeable delay. After the data transfer is completed, it will enter sleep mode again. This reduces the energy consumption of the accelerometer as much as possible.
Based on the low-power design of the Bluetooth accelerometer, the low-power design of the Bluetooth accelerometer greatly reduces the power consumption of the device. The realization of wireless mesh networking based on low-power bluetooth technology can reduce the cost of networking and reduce the overall power consumption of the network, which has important practical significance.
