CC2500 Pins to Raspberry Pi GPIO Pins GND (CC2500) → Ground (Pin 6 on Raspberry Pi GPIO header) VCC (CC2500) → 3.3V Power (Pin 1 or Pin 17 on Raspberry Pi GPIO header) Ensure the CC2500 module operates at 3.3V. Connecting it to 5V may damage it. SPI Pins: SI (CC2500) → MOSI (GPIO 10) (Pin 19 on Raspberry Pi GPIO header) SCK (CC2500) → SCLK (GPIO 11) (Pin 23 on Raspberry Pi GPIO header) CSN (CC2500) → CE0 (GPIO 8) (Pin 24 on Raspberry Pi GPIO header) This is the Chip Select line. SO (CC2500) → MISO (GPIO 9) (Pin 21 on Raspberry Pi GPIO header) Optional Pins: GDO0 (CC2500) → Any GPIO Pin (e.g., GPIO 18) (Pin 12 on Raspberry Pi GPIO header) Use this for interrupt handling or data-ready signals if required. GDO2 (CC2500) → Any GPIO Pin (e.g., GPIO 25) (Pin 22 on Raspberry Pi GPIO header) Additional interrupt or data pin. Power Amplifier Pins (If Applicable): PA_EN (CC2500) → Any GPIO Pin (Optional, depending on whether you control the amplifier externally or not). PA_EX (CC2500) → Not Connected (unless needed for a specific configuration)