Convert USB2.0 to RS232 Logic Levels No Drivers. DEVICE: AirDrive Serial Logger Module Max - a modular asynchronous serial logger that records data streams from an RS232 interface. HARDWARE: PC USB2.0 Port > USB Cable > Printer USB2.0 Port. PROBLEM: OEM makes only RS232 - no USB version. I need to make one that converts USB2 source signal to RS232 Logic Level signals. CHALLENGE: No Software No Drivers. HELP: I need to purchase components, boards or shields to accomplish this without Software or Drivers. TY. Not sure if this belongs in teensy.
If you can locate [one of these, that might do the trick for you.
Otherwise you’re going to need to write your own USB firmware and burn that to a USB enabled micro controller like a ATmega32u4 or a SAMD21.](https://store.arduino.cc/usa/arduino-usb-2-serial-micro)