nRF52833 chip, built-in Contex M4 + FPU microsystem, and configured with 512KB of non-volatile memory and 128KB of random-access memory, providing users with more design and code storage space, which is conducive to enabling the production of more design and flexible applications. 42 GPIO versatility can be set via software, supports NFC-A tag for access control and quick configuration applications, full-speed USB 14Mbps input/output, 1.7V to 5.5V voltage input. Supports low power Bluetooth, Blu