phyduino/analog_shield/blink_leds/main.py

Blinks the shield's green and red LEDs in turn, each for half a second.

Connect

JP3 (VIO) on 3.3 V. Each LED lights when its pin is low.

Uses

green_led, red_led: Led.on(), Led.off()

# Blinks the shield's green and red LEDs in turn, each for half a second.
#
# Needs analog_shield.py on the board and JP3 (VIO) on 3.3 V. The LEDs light
# when their pin is low; green_led and red_led take care of that.
 
import time  # sleep() for pauses
 
import analog_shield as shield  # the Analog Shield library, used as shield.<name>
 
while True:  # repeats until stopped: Interrupt in PyCharm, or mpremote soft-reset
    shield.green_led.on()  # green on (D6 low)
    shield.red_led.off()  # red off (D5 high)
    time.sleep(0.5)  # wait half a second
    shield.green_led.off()
    shield.red_led.on()
    time.sleep(0.5)