PinAlarm triggers from capacitive touch instead of button press on RP2040 #10630
Description
CircuitPython version and board name
Adafruit CircuitPython 10.0.0-beta.3 on 2025-08-29; Adafruit Feather RP2040 with rp2040Code/REPL
import board
import time
import neopixel
import digitalio
import alarm
import adafruit_debouncer
from adafruit_led_animation.color import RED, GREEN, BLUE, PURPLE, BLACK, GOLD
class Main:
def __init__(self):
########################
# set up key
self.keypin = digitalio.DigitalInOut(board.A1)
self.keypin.direction = digitalio.Direction.INPUT
self.keypin.pull = digitalio.Pull.DOWN
self.btn = adafruit_debouncer.Debouncer(self.keypin)
print(dir(self.keypin))
########################
# set up button neopixel
print(type(alarm.wake_alarm))
self.pixels = neopixel.NeoPixel(board.A0, 30)
if self.keypin.value:
self.pixels[0] = GREEN
self.wokeup = True
else:
self.pixels[0] = GOLD
lastaction = time.monotonic()
def Loop(self):
while True:
self.btn.update()
if self.btn.rose:
self.lastaction = time.monotonic()
self.pixels[0] = GREEN
elif self.btn.fell:
self.lastaction = time.monotonic()
print("Fell")
self.pixels[0] = BLACK
if time.monotonic() - self.lastaction > 5:
self.pixels[0] = GOLD
time.sleep(0.1)
self.pixels[0] = BLACK
self.btn = None
self.keypin.deinit()
print("Goodnight")
pin_alarm = alarm.pin.PinAlarm(pin=board.A1, value=True)
alarm.exit_and_deep_sleep_until_alarms(pin_alarm)
main = Main()
main.Loop()Behavior
After entering sleep mode, putting a finger near the button or it's connecting cable will trigger the PinAlarm.
Description
Hardware: Feather RP2040 with NeoKey breakout attached to A0 (neopixel) and A1 (key)
Key will turn yellow (if key is low) or green (if key is high) at boot. Code will enter deep sleep after 5 seconds. Touching or getting near enough to the cable or the breakout will trigger the pinalarm. I've had it happen at almost 1" distance, and sometimes needs to be as close as actually pinching the connecting wires between 2 fingers.
Additional information
No response