I'm trying to find a common UART to USB device for running on a Windows machine to capture a digital signal that is 0-12V running pretty slow at only 100 bits per second. The communications protocol uses standard 8 bits with 1 start, 1 stop and no parity. I've used a simple voltage divider network to drop the signal to 0.9-3.2V. The lowest baud rate I can choose for the devices I've been trying to use is 110. My pulse width is 10ms. I'm using Putty as my terminal emulator and all I am getting is garbage characters. I've tried a CP2102 and a CH340 with no luck. Any ideas on how to make this work? I'd like to stay away from bit banging with something like an Arduino to keep the solution as simple as possible if this is doable. Any ideas would be greatly appreciated.
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