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All BrightSign players offer serial I/O for diagnostic and interactive capabilities. Many models have a dedicated serial port (either DB9 or 3.5mm) to enable serial communication. This page outlines how to configure the player and host device for serial communication.
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While the DB9 port supports RS-232 communication, the 3.5mm serial port does not interoperate with some RS-232 devices because it uses 0V/+5V signaling. It can receive from any RS-232 device but transmission may not work depending on the electrical characteristics of the device. Check the hardware documentation for details on each player. |
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While the USB port can be used to send serial commands (for example, to control certain monitors), console functionality is only available through the DB9 or 3.5mm jack. |
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The UART (asynchronous serial) interface is a 3.5mm (1/8") jack that uses RS-232 levels for communication*. The receiver will tolerate input voltages between -30V and +30V, with anything below 3V interpreted as logical 1. The transmitter drives +8V for logical 0 and -8V for logical 1.
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Serial devices connected to a USB port will enumerate on port 2 of the player (on the LS424 player, they will enumerate on port 0). Additional USB-serial devices will enumerate on ports 3, 4, 5, etc. The enumeration order will remain consistent between reboots as long as the USB-serial devices are connected to the same player/hub ports. The enumeration order can be retrieved using the "usblist" command at thebrightsign>shell prompt; otherwise it will need to be determined by testing the setup.
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* The 3.5mm serial ports on some older player models do not fully meet the TIA/EIA-232-F transmitter requirements. These units will interoperate with most, but not all, conformant EIA-232 receivers. Consult the hardware documentation for your player for full details.