Be careful with those usb-serial adapters. I have a modbus meter that refuses to talk to them, but works fine with motherboard-integrated ports. You can buy PCI and PCIe serial port adapter cards from newegg that might work better.
Be careful with those usb-serial adapters. I have a modbus meter that refuses to talk to them, but works fine with motherboard-integrated ports. You can buy PCI and PCIe serial port adapter cards from newegg that might work better.