Arduino connection to a coin-operated device

Other Hardware LEDs and Multiplexing
1

Hello,
I'm looking for some time how to connect my arduino mkr 1010 wifi with a coin-op: comestero rm5 evolution.
I can't find the information in the documentation
it is just written that you can connect in series with rx/tx (5v)
I have tried but I can't, I don't get any information from the coin acceptor.
Maybe the baud rate is not good 9600 but I can't find any other baud rate I could test.
I'm starting to run out of ideas.

If someone could give me some advice it would be great

Thanks in advance

2

You are expected to show your wiring and sketch.

Show us a good schematic of your proposed circuit.
Show us a good image of your ‘actual’ wiring.
Give links to components.,

In the Arduino IDE, use Ctrl T or CMD T to format your code then copy the complete sketch.

Use the </> icon from the ‘reply menu’ to attach the copied sketch.

3

Please post a schematic of your setup.

Please post data sheets for the components of your setup.

Please post the test code. Read the forum guidelines to see how to properly post code and some good information on making a good post.
Use the IDE autoformat tool (ctrl-t or Tools, Auto format) before posting code in code tags.

4

sh1
sh1291×517 26.1 KB

5

Pin 1 : power 0V
Pin 2 : Power 5vdc
Pin 3 : TX
Pin 4 : RX
Pin 5 & 6 -> n/a

6

The mkr 1010 is a 3.3V device. Connecting it to 5V I/O is likely to destroy it.

7

ah! i already have it connected for a while, but yet it says 5v on the 5v pin?

8

We have no idea if your device uses RS232 levels.

We cannot confirm the devices pin designations.

We cannot identify the protocol used or even the speed.

Your code is a bit hard to read.

No pertinent information, equals no help, good luck. :frowning:

9

Disconnect the mkr 1010 and load a blink program, to see if it still works. The I/O pins that were connected to the coin device may nevertheless be destroyed.

11

I think it's a connection like RS232 According to some research I did on the net

But on the user manual it is just written what each terminal corresponds to but nothing more

12

Ok is there a way to check that these pins are still working?

13

Sure, try using them for something else, input and output.

it is just written that you can connect in series with rx/tx (5v)

Where is this "written"? Please post a link.

14

Ok, after some research indeed it is absolutely necessary 3.3v, I am new in Arduino, how to proceed to transform from 5v to 3.3v for RX / TX?

15

First, you have to know the voltage levels the RX/TX lines on the coin device. If those are indeed 5V, and the I/O pins on the mkr 1010 have not been destroyed, then you can use a level shifter like this:

16

IMG_20220315_235900
IMG_20220315_2359001080×498 108 KB

17

Measure the voltage on pin 4 of the connector. My guess is that pin 4 transmits information, and would be connected to RX of a receiving device. With a level shifter, if required by the receiving device. For that one way connection, if it is 5V to 3.3V, a resistive divider will work:

Do you have the transmission protocol?

18

I'm going to order the 5v to 3.3v converter quickly, I'm going to bed I see tomorrow for the protocol used, thank you

19

Here is the user manual it is also possible to connect using 16 pins but I don't know how to do it either. Maybe it's easier than serial :person_shrugging:

20

According to the manual:

The RM5 Evolution series includes 10 versions with different performances to better meet
the different requirements.

Which version you have?

21

Hello, I have just received the card that you recommended to me.

IMG_20220318_175910
IMG_20220318_1759101920×3409 304 KB

How should I proceed to connect the cards?

I have the Rm5 evolution
RL5G0024E49I110

Thanks :relieved: