There are already some softwares for PC who control some commercial USB to DMX dongles, but I don't know them.
There is a heading byte and 512 "channels". I was looking for an handy way to manage two or more DMX lines use a RS485 interface, sending sequences of 513 bytes (one start bit + eight data bits + two stop bits). A lot of lighting devices are controlled using the DMX protocol.Īt electric/hardware level the DMX is a cyclic asyncronous trasmission of 513 bytes at 250kbps on a RS485 line.Ī standard DMX connection use a 5 pin connector with two RS485 channels, but many devices uses a three pin connector and just one RS485 channel.Įvery controlled device use one or more of the 512 channels to know what to do.
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