通过实验我们实现了防丢器的目标。在母机和子机的距离在10m之内时，NR

Through experiments we have achieved the goal of anti-lost devices. When the distance between the master machine and the slave machine is within 10m, the NRF25L01 wireless communication sender and receiver can communicate normally; when the distance between the master machine and the slave machine exceeds 10m, the master machine has an audible alarm and a vibration alarm, and the slave machine has a sound alarm. To this end, we also made a data test table and physical model diagram,

Through experiments, we have achieved the goal of anti-thrower. When the distance between the mother and child machine is within 10m, the NRF25L01 wireless communication transmitter and receiver can communicate normally, when the distance between the mother and the sub-machine exceeds 10m, the mother machine has an audible alarm and vibration alarm, and the sub-machine has an audible alarm. To this end, we have also made data test sheets and physical model diagrams,

Through the experiment, we achieve the goal of anti loss device. When the distance between the master and the slave is within 10 m, nrf25l01 wireless communication transmitter and receiver can communicate normally; when the distance between the master and the slave is more than 10 m, the master will give sound alarm and vibration alarm, and the slave will give sound alarm. For this reason, we also made data test table and physical model diagram,