Tag Archives: usb

USB to UART Bridge Controller (dongle)

Finally i’ve got TTL to USB dongle. Here is some photos:

CP2102 Front
CP2102 Back

Silicon Labs CP2102 as detected by MacOS

CP2102 MacOS USB1
CP2102 MacOS USB2

Drivers can be downloaded from the official site.
Driver version 4.1.1 successfully installed under MacOS X Yosemite 10.10.5 (14F27).

$ kextstat | tail -1
  170    0 0xffffff7f832d7000 0x6000     0x6000     com.silabs.driver.CP210xVCPDriver (4.1.1) <90 37 4 3>

driver loaded and we’re got two special character devices under the /dev directory:

$ ls -la /dev/*SLAB*
crw-rw-rw- 1 root wheel 17, 11 Sep 14 23:04 /dev/cu.SLAB_USBtoUART
crw-rw-rw- 1 root wheel 17, 10 Sep 14 23:04 /dev/tty.SLAB_USBtoUART

now we’re should perform loopback test. Short RX and TX pins, and run terminal:

sudo cu -l /dev/tty.SLAB_USBtoUART -s 115200

try to enter some text. Letters should be displayed while each key pressed.
If you’re see typed text all fine and press ~. (tilde and period) to exit terminal.