3D Printed Raspberry Pi Pan Tilt Camera with Game Pad Control

Admit it, if you have been following my recent articles, you knew this was coming ;)

• Pi webcam
• Pan-Tilt
• Game Pad Control

Let's pull these things together!

Full code in the gist here

We know these servos accept a maximum and minimum pulse width (signal), so all we do is increment and decrement while checking for those values.

I was asked why I am using the buttons instead of the joysticks. The answer is, it's simply easier to show the code right now if we keep it simple. Keep following these articles and all will become clear ;)

from evdev import InputDevice
import pigpio

pi = pigpio.pi()

tilt = 17
pan = 27


x = 1250
y = 1250

# want to display ALL info?
debug = False

if debug:
        for device in evdev.list_devices():
                print(evdev.InputDevice(device))

        input("Press Enter to continue ...")

# create object to read input - specify YOUR device
controller = InputDevice('/dev/input/event0')

# what are the controller details?
if debug:
    print(controller)

# read controller info in an infinite loop
for event in controller.read_loop():

    # here I am looking for the start button
    # so I can quit
    if event.type == 1:
        exit()

    # set as true above if you want to look up
    # different button values
    if debug:
        print("\n\nEvent Type:{}".format(event.type))
        print("Event Code:{}".format(event.code))
        print("Event Value:{}".format(event.value))

    # look for pad moves
    if event.type == 3:

        # up and down is 17
        if event.code == 17:
            if event.value == 1:
                print("\n\n\nPad Up\n")
                if y > 600: y -= 100
            if event.value == -1:
                print("\n\n\nPad Down\n")
                if y < 2400:y += 100

        pi.set_servo_pulsewidth(tilt, y)

        # left and right is 16
        if event.code == 16:
            if event.value == -1:
                print("\n\n\nPad Left\n")
                if x > 600: x -= 100

            if event.value == 1:
                print("\n\n\nPad Right\n")
                if x < 2400: x += 100

        pi.set_servo_pulsewidth(pan, x)