Bluetooth 4.0 anti-lost device overview:

The Bluetooth 4.0 anti-lost device is based on the GB2540 module design. GB254X is a high-performance, ultra-low-power (Bluetooth Low Energy) RF transceiver system module using Texas Instruments TI Bluetooth 4.0 CC2540 or CC2541 as the core processor, following the Bluetooth low energy protocol, suitable for single-mode Bluetooth low energy application.

Use function:

1. Out of the fence mode: when the mobile phone is connected to the anti-lost device, if the signal strength is less than the set value of the mobile phone or no signal, the mobile phone rings and the anti-lost device rings.

2. Enclosed fence mode: when the mobile phone scans the anti-lost device, if the signal strength is greater than the set value of the mobile phone, the mobile phone rings and the anti-lost device rings.

3. Call reminder function: when the phone calls, the anti-lost device buzzer sounds, so that in the winter, the phone will not be heard in the bag.

4. The battery used is: lithium battery, which can be recharged repeatedly and can be charged once a month.

Use distance:

20 meters to 30 meters to 60 meters to 70 meters are possible, because of many factors such as the environment, mobile phone signals and other factors.

Note as follows:

In order to prevent the device from being found, exclude the method that most anti-lost devices need to be pressed to connect, and use the slow continuous broadcast method, so that when you don’t know where to put your things, you can find it and really prevent loss. The role of the device.

The connection is initiated by the device side after the connection is initiated. When the request is not responded within 30 seconds, the connection is actively disconnected. Use the confirmation and cancellation methods, if necessary, you can change the password to prevent others from connecting to your anti-lost device.

Prompt tone supports custom ringtones, just need to get the score of the desired music, and then convert the pitch into frequency, and convert the beat notes into time length, corresponding to the ringtone array written in the BUZZER file, the format is a frequency A length of time can end with 0,0 to meet the needs of people with different ringtones.