The main purpose of the adapter board BCT-3603A-X02 is to connect to the development board BCE-GENTrx32-002 for use. The adapter board brings out the castellated pins of the module (BM3603A-14-1) and includes a spring antenna, making development more convenient.
The BC3603A is an OOK/FSK/GFSK RF transceiver from Holtek, which can be applied to license-free ISM (Industry, Science, and Medicine) frequency bands including 315MHz, 433MHz, 470MHz, 868MHz, and 915MHz.
The BM3603A-14-1 is an RF transceiver module designed based on the BC3603A, featuring an SPI interface for communication with an external master MCU.