Has anybody ever managed to use this Serial USB Andon Stack Light with Tulip before?
Amazon.com: ANDONT USB 3-Stack LED Andon Tower Signal Light with Buzzer for Workstations, Industrial, 5VDC, IP53 Rated, Plug-and-Play : Industrial & Scientific
It uses a CH340 serial chip and accepts hex commands to trigger light change events via 9600 baud Serial.