Raspberry Pi Pico 2-Channel RS232 Module User Manual Raspberry Pi Pico Header Compatibility: Onboard Female Pin Header for Direct Attaching To Raspberry Pi Pico - Raspberry Pi Pico is not included What's on Board:
1. SP3232 RS232 transceiver 2. Raspberry Pi Pico header 3. RS232 bus interface 2-channel RS232 (DB9 male connector is also available through adapter cable) 4. TVS diode 5. ESD diode 6.