So I am trying to connect to my pi over serial. I have never used serial, so I hope what I have is fine. I can't order anything new. I have a USB to serial adapter (RS232 I think, you can check the picture below) and an RS232(i think) connector. I would like to connect the USB connector to my PC(windows or Linux) and the other connector to my pi, and then access the terminal over serial. I have a monitor to set stuff up, and I have PuTTY. I am using a pi 3 running the latest stretch lite image. USB adapter

serial connector

  • I also have an adapter as both connectors are male I think Feb 2, 2018 at 11:31
  • Raspberry Pi is a 3,3volt serial and you have probably higher voltage on your USB-Serial converter. And with your comment "Not anything new" then it's impossible to solve with what you have!
    – MatsK
    Feb 2, 2018 at 13:33
  • It almost sounds like SSH-ing in or running a virtual desktop would be better here. Is there a particular reason you're wanting to Serial? Feb 2, 2018 at 20:09

2 Answers 2


Frankly, you have bought the wrong device. What you need is a USB to serial device with 3.3V compatible outputs. There are hundreds of posts on connecting these.

There is NO WAY to connect RS232 to the Pi (except with a RS232 to 3.3V "TTL" adapter).

You could use the device you have in the Pi USB port to connect to a "RS232" interface on a PC (if you can find one - most PC manufactured in the last 10 years don't).
You then need to configure the Pi to use the resultant serial port (something like /dev/ttyUSB0) as a console.

To do this you need to check that the device you have has a driver supported by the Pi and reconfigure the Pi to use this as console - this is not a task for a beginner, but if you post details you may get help.


WARNING - Do NOT do this on the Pi This may be OK for a RS232 device - which the Pi is NOT. RS232 is ±15V, although most dongles use 0-5V neither is compatible with the 3.3V logic of the Pi. Even with level converters it will not work because RS232 polarity is reversed.

Use with caution

I'm not sure if it works but I have done it on machines and it works well didn't get the need to try it on pi As you said that you don't encourage new items dothe following connection to one of the UART pins on Rapi GPIO

Don't forget to common the ground and look for com port in device manager when if the device appears , then check for baud rate and use putty

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