An individual master device Bluetooth module can simultaneously establish connections with multiple slave device Bluetooth modules.

Similar to a radio broadcast (slave) and a radio (master), a radio broadcast can be picked up by multiple radios. Similarly, a Bluetooth slave can send out a Bluetooth broadcast signal within a certain range (usually within a few tens of meters), at which time the surrounding. The Bluetooth host can receive the broadcast information from the Bluetooth slave.

In addition, the Bluetooth host can be connected one-to-one with the Bluetooth slave, and the connection can be encrypted or unencrypted data communication.

One-to-Many can be achieved in a time-division manner, where it appears that one master can control N slaves, but in reality, it rapidly connects, communicates, and disconnects with N slaves in succession.

Many-to-One can be achieved without establishing a connection, where the slave broadcasts and the master receives the broadcast information.

Non-connected mode (unidirectional transmission): The slave broadcasts data, and the master receives it.

Connected mode (bidirectional transmission): The master connects to the slave, and both the master and slave can exchange data with each other.

Yes, that's correct. Bluetooth signals, Wi-Fi signals, and other wireless signals operate in the 2.4GHz frequency range. Therefore, if there are numerous Bluetooth devices, Wi-Fi devices, or obstacles such as walls in the vicinity, the Bluetooth signal can be affected.

1)Software Adjustment: The Bluetooth transmission power can be adjusted through software. Increasing the transmission power results in a longer communication distance.

2)Hardware Adjustment:

a) Antenna Selection (Coarse Adjustment): There are different types of antennas available, such as PCB antennas, ceramic antennas, and external antennas. Generally, larger-sized and higher-priced antennas provide better signal performance.

b) Fine Adjustment: The impedance matching of the antenna circuit needs to be optimized for optimal performance.

No, it's not. The ideal distance for Bluetooth communication depends on your project or specific use case. For example, a proximity tracker is best suited for distances within 10 meters. If the Bluetooth distance is too far, it might take a distance of 100 meters for the tracker to trigger an alert on the phone, by which time the wallet could already be lost.

Bluetooth can be divided into two types: Bluetooth for high data transfer rates and Bluetooth for low data transfer rates.

1) Bluetooth for high data transfer rates is known as Classic Bluetooth or simply Bluetooth. It sacrifices power efficiency to achieve higher data throughput. Examples include Bluetooth headphones and Bluetooth speakers.

2)Bluetooth for low data transfer rates is known as Bluetooth Low Energy (BLE). It offers power efficiency advantages, consuming as low as microamperes (uA) of power. It is commonly used in simple control applications, such as Bluetooth lights, Bluetooth curtains, Bluetooth cars, and Bluetooth door locks.

Classic Bluetooth and BLE are not compatible with each other and cannot communicate directly since they are based on different protocols.