Author Topic: RTS and CTS UART pins  (Read 1294 times)

0 Members and 1 Guest are viewing this topic.

Offline Silenus

  • Contributor
  • Posts: 48
RTS and CTS UART pins
« on: January 13, 2015, 02:53:46 am »
Hey guys, I am looking to put a WiFly into an embedded board that I'm making. In the datasheet, it says the most basic setup uses the PWR RX TX GND, however in the diagrams the UART is utilising the additional CTS and RTS pins. Do I need to connect these pins for serial comms to work between the module and MCU?

Offline apelly

  • Supporter
  • ****
  • Posts: 1040
  • Country: nz
Re: RTS and CTS UART pins
« Reply #1 on: January 13, 2015, 03:09:15 am »
RTS & CTS are for hardware handshaking. With only RX, TX & GND you can do software, XON/XOFF handshaking.

I haven't looked but you'll probably find that the WiFly is configurable for either. I don't think much uses hardware handshaking anymore, but I am prepared to be corrected.
I'd rather a Google clue, link, or some theory than "do this" (generally)

Online digsys

  • Supporter
  • ****
  • Posts: 2205
  • Country: au
    • DIGSYS
Re: RTS and CTS UART pins
« Reply #2 on: January 13, 2015, 03:37:33 am »
agreed. Worst case, you tie RTS or CTS High (whichever is designated as Input to the WiFi module). ie always on.
Hello <tap> <tap> .. is this thing on?

Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo