Read data from a RS232 port, how to connect to arduino mega?

[knolli102]

Hey guys!

Disclaimer: I am very new to everything inculding electronics and programming so please excuse my simple questions.

I'm trying to connect my mega 2560 R3 to this programmable power supply: http://www.w12.pwr.wroc.pl/dsp/plik/HM8143_D_E.pdf (The fist part is in german, the english part of the pdf begins on page 18).

---> I added a picture of the interface.

I was wondering if I can use this adapter to send and receive information on my arduino (I should run without a PC):
https://www.amazon.com/Ultra-Compact-RS232-Converter-Male
I am unsure whether there are enough pins because th rs232 has 9 pinouts and the adapter just covers 6?

I also read somewhere that I could use these converter boards: https://www.amazon.de/Mini-RS232-Konverter-Modul-Brett

but they seem a bit more difficult to handle. What do you think?

Thanks in advance!
Knolli

[hauerdie]

Hi Knolli,

from my experience, on most of devices with an RS232 you just need RX, TX and GND. So i guess both of these converter should work.
But you could also build your own with a MAX232 chip.

https://www.conrad.at/de/schnittstellen-ic-transceiver-texas-instruments-max232n-rs232-22-pdip-16-152281.html?sc.ref=Search%20Results

The second converter uses a mostly identical chip. Its not hard to wire up on a breadboard when you just need RX and TX. There are plenty of sources on the net how to use it.
And its practical if you know how to use it, then you will never need to look for an RS232 TTL converter if you need one.

Regards,
Didi