MIGRATED

this repo has been combined into asottile/nintendo-microcontrollers

---

nintendo switch controller arduino

control your Nintendo Switch using a pro micro

requirements

• pro micro (or compatible)
• ftdi usb to uart (or other uart device)
• usb cables (both use micro usb)
• wires

installation

sudo apt install avrdude gcc-avr avr-libc dfu-programmer

assembly

the assembly is fairly straightforward, here is a rough diagram of the parts and how they will be hooked up when operating

                        [your computer]
                            |
          +===========+     |
          | (ftdi)    |-----+ (usb cable)
          | gnd tx rx |
          +==-===-==-=+
             |   |  |
 +======+    |   |  |
 |buzzer|    |   |  |
 +======+    |   |  |  wires (note: tx matches with rx (crossed))
     |  |    |   |  |
    +-==-====-===-==-==+
    |9  gnd  gnd rx tx |-------------+  (usb cable)
    |     (pro micro)  |             |
    +==================+        [nintendo switch]

my assembly (I have a button from rst to gnd to help flashing)

building

make MCU=atmega32u4

use the appropriate MCU for your board, the pro micro uses atmega32u4

flashing

you have to be quick with this!

• connect the pro micro to your computer
• short rst to gnd twice in quick succession

sudo avrdude -v -patmega32u4 -cavr109 -P/dev/ttyACM0 -Uflash:w:output.hex

use the appropriate MCU and serial port for your board, the pro micro uses atmega32u4 and /dev/ttyACM0

usage

to use the controller:

• start the game you want to play
• press home
• navigate to controllers
• change order/grip
• at this point, connect the controller (it should register itself and start the game)

at this point, you can control the controller using uart

commands are single-byte ascii characters sent over 9600 baud serial.

this is the current list of commands:

V: enable verbose mode (microcontroller will reply with `revc: _`)
v: disable verbose mode

!: enable output on pin 9 (buzzer)
.: disable output on pin 9

0: empty state (no buttons pressed)
A: A is pressed
B: B is pressed
X: X is pressed
Y: Y is pressed
H: Home is pressed
+: + is pressed
-: - is pressed
L: left trigger is pressed
R: right trigger is pressed
l: ZL is pressed
r: ZR is pressed

directions:
 LEFT STICK            RIGHT STICK

      w                     u
   q     e               y     i
      ║                     ║
a  ═══╬═══  d         h  ═══╬═══  k
      ║                     ║
   z     c               n     m
      s                     j

 D-PAD

      4

      ║
3  ═══╬═══  1
      ║

      2

thanks

Thanks to Shiny Quagsire for his Splatoon post printer and progmem for his original discovery. Also thanks to bertrandom for his snowball thrower and all the modifications.