Example Script: servo_buttons_control
- Enter the servo_buttons_control script into python.microbit.org/v/2 .
- Set the Script Name field to servo_buttons_control.
- Click Load/Save, and then click Download Project Hex to save your work.
- Close the Load/Save dialog box after downloading.
- In the python.microbit.org editor, click Connect, and then click Flash.
# servo_buttons_control
from microbit import *
display.off()
pin9.set_pull(pin9.NO_PULL)
pin6.set_pull(pin6.NO_PULL)
pin16.set_analog_period(20)
value = 77
while True:
state9 = pin9.read_digital()
state6 = pin6.read_digital()
if state9 is 1:
value = value + 1
if value > 128:
value = 128
if state6 is 1:
value = value - 1
if value < 26:
value = 26
pin16.write_analog(value)
sleep(20)
Tests
It's time to verify that button presses adjust your servo's position.
- Connect the battery pack to the Edge I/O Adapter.
- Press and hold the P6 pushbutton. Verify that the horn rotates to the 0° position and then stops.
- Verify that you briefly press and release the P9 pushbutton, and that the servo angle increases toward 180° with each press.
- Press and hold the P9 pushbutton. Verify that the horn rotates to the 180° position and then stops.
- Verify that you briefly press and release the P6 pushbutton, and that the servo angle decreases toward 0° with each press.
- Disconnect the battery pack from the Edge I/O Adapter.