0x05 - 03.12.2021 1. Revised: overall stability of the device is improved. 0x04 - 23.07.2021 1. Fixed: the default value of the "transmitter power" parameter is changed. 0x03 - 09.07.2021 1. Revised: the mechanism of the Hall sensor is optimized. 2. Fixed: energy saving perfiomance is improved. 0x02 - 07.07.2021 1. Fixed: power consumption in various conditions is reduced. 0x01 - First release version.