haran wrote:Maybe they can be put together with the pins from top to bottom. I only need two. Is it needed something else than these dot led matrices?
I'm not sure if a led matrix (or multi-digit 7-segment led) display is the best/simplest solution for your "display needs". Unless you need to read it from "quite a distance" (eg. several metres) then may be an I2C-based 16 x 2 alphanumeric LCD display would me more appropriate. There is more existing python, 'C' (and other languages) code "out there" already since such displays are used by many many folks. FWIW, here's a link to my page to the various display types I've played with:
http://www.cpmspectrepi.uk/raspberry_pi ... plays.html
(and else where within my website** are examples of different ways of interfacing to them)
** see sig. for "homepage" link.
Still running Raspbian Jessie on some older Pi's (an A, B1, B2, B+, P2B, 3xP0, P0W) but Stretch on my 2xP3A+, P3B+, P3B, B+, A+ and a B2. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm