QLC+ On CM4

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pramod
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Joined: Mon Feb 13, 2023 8:13 am
Real Name: pramod madhav natu

I am using QLC + on CM 4.
If I am using a light of 20 addresses, Then value of address work alternately, i,e if I send value to address 1 it is received correctly , but if I want to send the value to address 2 I have to send it to address 3 and so on , But at the same time If send these values through OLA they work perfectly. Where could be the problem.
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mcallegari
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Send with which protocol/adapter?
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GGGss
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Real Name: Fredje Gallon

pramod wrote: Wed Feb 12, 2025 11:01 am I am using QLC + on CM 4.
If I am using a light of 20 addresses, Then value of address work alternately, i,e if I send value to address 1 it is received correctly , but if I want to send the value to address 2 I have to send it to address 3 and so on , But at the same time If send these values through OLA they work perfectly. Where could be the problem.
Wait wait wait ...
You are on a Raspi,
What is CM4?
'a light of 20 addresses'? I assume you mean a LED strip of some sort?
How do you send a value to address (DMX channel) 1? Using Simple Desk I presume
Set a value to channel (thus DMX Channel 2) -> you need to set a value to DMX channel 3 ?????
This doesn't make any sense!

And now you make your life miserable by:
a) You are unsure that QLC+ talks to your lights one-to-one
b) Adding to the uncertainty, are you starting to add OLA?
c) where did you bind the OLA inputs to? (Knowing that the button - bound to a scene- isn't working properly in the first place !!)
All electric machines work on smoke... when the smoke escapes... they don't work anymore
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mcallegari
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gme
Posts: 2
Joined: Thu Feb 20, 2025 5:46 am
Real Name: Salman

I also faced this problem.

First of all, I checked which "UART" output device I was using. In the QLC+ output modules, I saw "ttyS0". After doing some Google searches, I found out that ttyS0 is not recommended for DMX. Instead, I should use the "ttyAMA0" module.

To do this, I had to add these two lines to the /boot/config.txt file:

enable_uart=1
dtoverlay=disable-bt

After that, I rebooted the Raspberry Pi.

Once the Pi booted up, I selected "ttyAMA0" in the QLC+ modules, and I was able to get a proper UART signal.
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