Is RS232-to-Everything adapter DTE or DCE?

Q&A forumCategory: QuestionsIs RS232-to-Everything adapter DTE or DCE?
Knut Flatvad asked 5 months ago

I bought a RS232-to-Everything adapter. It has a female DB-9 connector. 
I want to use the RS232-to-Everything adapter with a simpleRTK2Blite to feed NMEA position messages in to a an AG-leader Farming Display.
The Display has also a female DB-9 connector on its cable harness.
Can I use a simple gender changer like this:
Simple Gender Changer
Or do I need some kinde of null modem adapter?
Thanks in advance!

Ardusimple Staff replied 5 months ago

Hi Knut,
That’s a good point, we should sell a cable kit in our store
Null modem will depend on the RS232 configuration of you AG-leader, i’m afraid you will have to try…
Please keep us posted, we find this integration very interesting!

Knut Flatvad replied 5 months ago

Tank you for replying. Ok I have to try, but is the RS232-to-Everything adapter DTE or DCE?

Ardusimple Staff replied 5 months ago


3 Answers
Kaupoi answered 4 months ago

I think simple gender changer will do the trick.
I’ve used TTL to RS232 converters with simpleRTK2B boards to add RS232 connector for ag purposes. Then used simple serial cable between simpleRTK2B and ag terminals.
Some photos:!Ao6_PnVNR5RXhJ9w-kwI9blutG-Fmg?e=u2UrOQ

Knut Flatvad replied 4 months ago

Ok, I’ll Try that

Knut Flatvad answered 4 months ago

Summary of the experiences of feeding NMEA data from RS232-to-Everything adapter on a simpleRTK2Blite to a AgLeader InCommand display with Ontrack3 autosteering.

  • Straight through gender changer adapter as shown in my first question did not work
  • Null modem cable does not work either. The null modem cable I used was like this:

    It blowed the fuses that feed power to the display. The reason is that pin number 4 on display DB9 plug carries 12V from the display and the null modem cable wil short this to the ground on pin number 6 on the RS232-to-Everythin adapter.
  • The solution was to make my own null modem cable like this:

    DB9 on AgLeader Display
    DB9 on RS232-to-Everything-adapter

    TX 2
    3 RX

    RX 3
    2 TX

    signal GND 5
    5 GND


    power plug on RS232-to-Everything-adapter

    +12V 4
    center pin

    “-12V” 6
    outer collar

    It worked perfect, and it also supplied the  RS232-to-Everything adapter and the simpleRTK2Blite with power.

It is also smart to take note of this forum thread.

Knut Flatvad answered 4 months ago

The description of the cable I meade in my last post is impossible to understand, so here is a better image:

Ardusimple Staff replied 4 months ago

Dear Knut,

Thank you for your post. We have built a sample cable and we would like to send to you for test. If you could confirm you could test it for us we will be happy to send it to you this sample. Contact us at