USB-TTL interface devices on OS X

Preamble

I purchased a number of USB-TTL devices from eBay. None of them want to play ball when plugged into my MacBook Pro. The first is a FTDI device, the others are clones:

  • FT232RL
  • CH340G
  • CP2102
  • PL2303

All work fine on a Windows 7 PC, but Macs are always quite touchy with the clones. FTDI drivers are available, and as of OSX 10.9, Apple include the FTDI drivers, so the FT232RL device should (in theory) be recognised. The other drivers offer varying success rates, for example CH340G. The CP2102 and PL2303 are physically very similar devices. Continue reading USB-TTL interface devices on OS X