This DB9 to 3-pin adapter cable is the same cable included with the 2-Channel RS232 Pico module.

Whilst we’ve stocked this to allow owners of the 2-channel RS232 Pico module to purchase a second cable for use with the additional channel, it’s also useful for any other RS232 projects requiring a breakout to female jumper headers for use with standard 2.54 pin headers.

Pinout

• Black wire = GND
• Red wire = RX1
• Yellow wire = TX1