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Discussion Starter · #1 ·
Hello.
After a few years I found old HO steam locomotive.
The train works on old analog DC system.
I'm trying to convert it to DCC++.
I want to keep it within budget configuration so I bought:
- Arduino UNO
https://www.aliexpress.com/item/UNO...053.html?spm=a2g0s.9042311.0.0.5a884c4dQGsFz1

- DC Motor Shield
https://www.aliexpress.com/item/Rep...601.html?spm=a2g0s.9042311.0.0.5a884c4dQGsFz1

- 2 x DCC Decoders (cheapest)
https://www.aliexpress.com/item/NEM...789.html?spm=a2g0s.9042311.0.0.5a884c4dQGsFz1

I have uploaded the last version of DCCpp_Uno to arduino. https://github.com/DccPlusPlus/BaseStation
I have connected 4 pins according to manual.. https://github.com/DccPlusPlus/Documentation/blob/master/Motor Shield Pin Mappings.pdf

I have intalled JMRI on computer http://jmri.sourceforge.net/download/index.shtml

I think that this part of hardware works, because when I apply POWER (JMRI) the four leds on MotorShield glows.

The problem is, that (china) DCC Decoder doesnt respond to any of commands from JMRI.
I bought two DCC decoders and none of them doesnt work...

Does anyone have experience of how to succesfully connect Arduino (as base station) and LaisDcc 860021 decoder?

Thanks.

BR, FarCry
 

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Discussion Starter · #5 ·
Hello.
I have figured out what went wrong...
Simple… You have to connect motor (load) to decoder…
Obviously, the decoder needs load (connected motor to gray/orange wires) to work.
I didn’t read anywhere about that….
I didn't connecti themotor to decoder becouse I want to test decoders before installing them to loco…
After connecting motor to decoder everything started to work.
Great.
Best Regards, FarCry.
 
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