A wireless communication system is a wireless communication system including a slave device, and a master device wirelessly connected to the slave device, and the master device includes a master device wireless communicator that performs wireless communication with the slave device, a master device power supply that supplies power to each unit of the master device, a master device interrupt detector that detects various interrupts, and a master device controller that controls the entire master device, the master device interrupt detector supplies power from the master device power supply to each unit of the master device when detecting the interrupt, and the master device controller performs control to continuously transmit a capture signal to the slave device that waits for reception at a reception timing of a predetermined interval, via the master device wireless communicator for time longer than the predetermined interval.