These pins are highly configurable via CC1101 registers. Common uses:
(the side with the components and antenna connector), the pins are typically numbered as follows: Pin Number Description Power supply input ( 1.8V – 3.6V Common ground connection Chip Select (Active Low) Serial Clock input SPI Data In Master Out Slave In SPI Data Out Master In Slave Out (also used for GDO1) Digital Out Configurable output (often for interrupts) Digital Out Configurable output (often for RX/TX status) Blog Post: Getting Started with the E07-M1101D Module 1. Hardware Essentials This module is a powerhouse for 433MHz ISM band e07-m1101d pinout