Serial Cable DB9F to 3.5mm DCS4 TAKE CONTROL 4 Null Adapter Kit
6 Foot DB9-Female to 3.5mm TRS Connector Male
Generic Serial Transfer Cable For DevicesStereo 3.5 mm Jack.
to DB9-F Serial Port.
Primarily used to transfer Serial Data back and forth from Small devices.
Use included Null M-F adapter to Reverse Pins 2 and 3.
Wiring Schematic
DB9 TRS Connector 3.5mm (With Null Adapter) Pin 1-6-7-8 Pin 2 Ring - Right Pin 3 Tip - Left Pin 4 Pin 5 Sleeve - Shield - Ground Pin 9 Shell Sleeve - Shield - Ground