How to connect your Vu+ Solo 4K or Vu+ Zero to your computer using an RS-232 serial connection.

  1. get a USB to Serial adapter
  2. make a RJ12 to RS232 cable
  3. connect to PC
  4. start serial console


USB to Serial adapter

Any adapter should work, but ones with a genuine FTDI chip are preferred.


Making an RJ12 to RS232 cable

a) get a RJ12 connector (RJ12 has 6 pins) and 3 wire cable, or
b) get a cable with RJ12 connector and cut one side off, or
c) get a RJ12 to Serial cable from eBay or Aliexpress and open it to change the pinout to match the Vu+ pinout

Connectors pinouts

The pinout of RJ12 on the back of the Vu+ Solo 4k is as follows:


The pinout of the RS232 connector on the PC side (RS232 adapter side) is as follows:

Connecting to the PC

On Windows, use Putty, and on Linux and Mac, use minicom.


In Windows Device ManagerPorts (COM & LPT), look for the COM port number.
Set it to 115200 bps, 1 stop bit, no parity, and no flow control manually.


apt-get install minicom
ls /dev/ttyUSB*
minicom -D /dev/ttyUSB2 -b 115200 -8


brew install minicom
ls /dev/cu*
minicom -D /dev/cu.usbserial-FT17E02J -b 115200 -8

Turn the Vu+ on with the switch on the back while minicom/putty is listening.



Is your cable not working? TX and RX wires could be reversed. Check that the TX output wire from the Vu+ side has 9 volts (between TX and GND). Check that GND is shorted with GND at various points on the board (GND on power connectors etc.)


How it looks like