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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => Lighting Forum => Topic started by: David Allred on April 20, 2019, 03:36:28 pm

Title: My wireless DMX findings
Post by: David Allred on April 20, 2019, 03:36:28 pm
 While checking on the PCB style trans-ceiver units for a project, I decided to play with my dongles.
I have 2 Chinese dongle transmitters and 8 or so receiver dongles (button style).
This what I found. 
The transmitters (with antenna) also receive. 
The button style receivers will not transmit.
A fixture can receive dmx signal from Male or female side as long as a physical connection can be made, with a turn around (for example).
If a fixture has an input from a wireless source, a transmitter can't be used as a repeater on the output to other fixtures on the same wireless channel (color).
But, one can repeat if on a different channel (color).

Maybe that will help someone.
Title: Re: My wireless DMX findings
Post by: Lyle Williams on April 21, 2019, 10:54:34 am
What are the button-style receivers?
Title: Re: My wireless DMX findings
Post by: David Allred on April 21, 2019, 02:37:57 pm
What are the button-style receivers?

The kind without antennas.  (Round ends that light up.  Rounded like a button.)
Title: Re: My wireless DMX findings
Post by: Steve Garris on April 21, 2019, 03:45:36 pm

If a fixture has an input from a wireless source, a transmitter can't be used as a repeater on the output to other fixtures on the same wireless channel (color).
But, one can repeat if on a different channel (color).



This is informative - didn't know!

I assume you are talking about these:
https://www.donnerdeal.com/products/bundel-donner-2-4g-dmx512-wireless-transmitter-receiver-built-battery?variant=8786569953369&utm_medium=cpc&utm_source=google&utm_campaign=Google%20Shopping&gclid=EAIaIQobChMI_72VzPjh4QIVXx-tBh3jHQdlEAQYAyABEgJedPD_BwE
Title: Re: My wireless DMX findings
Post by: David Allred on April 21, 2019, 09:05:08 pm
This is informative - didn't know!

I assume you are talking about these:
https://www.donnerdeal.com/products/bundel-donner-2-4g-dmx512-wireless-transmitter-receiver-built-battery?variant=8786569953369&utm_medium=cpc&utm_source=google&utm_campaign=Google%20Shopping&gclid=EAIaIQobChMI_72VzPjh4QIVXx-tBh3jHQdlEAQYAyABEgJedPD_BwE
Correct.

The pcb types are either.  If they detect dmx they automatically transmit.  If they don't, they scan for a wireless signal.
Title: Re: My wireless DMX findings
Post by: Lyle Williams on April 22, 2019, 12:33:37 am
The least fun thing about the transceivers is the ability of something you considered to be a receiver to become a transmitter.  Someone cycling through the fixtures settings can trigger this.
Title: Re: My wireless DMX findings
Post by: Jason Fultz on April 22, 2019, 09:30:51 am
Correct.

The pcb types are either.  If they detect dmx they automatically transmit.  If they don't, they scan for a wireless signal.

So let me make sure I understand. The pub add on style  Transceivers are a transceiver, the both recieve and transmit dmx at the same time.
So adding these to some of my fixtures would create a wireless network of their own also.
I've been using the Lixada light up button type for a while now pretty successfully and like them.
But being able to add some of these to permanent installs would be cool.
Title: Re: My wireless DMX findings
Post by: Rob Spence on April 22, 2019, 07:59:06 pm
So let me make sure I understand. The pub add on style  Transceivers are a transceiver, the both recieve and transmit dmx at the same time.
So adding these to some of my fixtures would create a wireless network of their own also.
I've been using the Lixada light up button type for a while now pretty successfully and like them.
But being able to add some of these to permanent installs would be cool.

No. They are either but not at same time.



Sent from my iPad using Tapatalk Pro
Title: Re: My wireless DMX findings
Post by: David Allred on April 23, 2019, 03:53:45 pm
No. They are either but not at same time.



Sent from my iPad using Tapatalk Pro

Rob is correct.  But you could set up a "red channel" as level 1.  Red transmit to red receive on a fixture (or fixture) within range.  That same fixture, with a "Green" transmitter on the output, could transmit to a slew of Green receivers that were out of range of the red transmitter.  rinse and repeat.
Title: Re: My wireless DMX findings
Post by: Lyle Williams on April 24, 2019, 05:30:17 pm
I am not sure that the output is properly differential RS485.  I suspect that they only apply signal to one pin.