Python Button.when_held方法代码示例

# 需要导入模块: from gpiozero import Button [as 别名]
# 或者: from gpiozero.Button import when_held [as 别名]
from gpiozero import Button
from subprocess import check_call
from signal import pause

def shutdown():
    check_call(['sudo', 'poweroff'])

shutdown_btn = Button(17, hold_time=2)
shutdown_btn.when_held = shutdown

pause()

# 需要导入模块: from gpiozero import Button [as 别名]
# 或者: from gpiozero.Button import when_held [as 别名]
    omx11 = udp_client.UDPClient("192.168.1.211", 9998)
    omx12 = udp_client.UDPClient("192.168.1.212", 9998)

    msg2 = osc_message_builder.OscMessageBuilder(address="/omxplayer")
    msg2.add_arg(1)
    msg2.add_arg(3)
    msg2 = msg2.build()
    omx1.send(msg2)
    omx2.send(msg2)
    omx3.send(msg2)
    omx4.send(msg2)
    omx5.send(msg2)
    omx6.send(msg2)
    omx7.send(msg2)
    omx8.send(msg2)
    omx9.send(msg2)
    omx10.send(msg2)
    omx11.send(msg2)
    omx12.send(msg2)
    check_call(['sudo', 'reboot'])


def btn_pressed():
    _thread.start_new_thread(reboot_process, (1, ""))

reboot_btn = Button(27, hold_time=3)
reboot_btn.when_held = poweroff

reboot_btn.when_pressed = btn_pressed

pause()

# 需要导入模块: from gpiozero import Button [as 别名]
# 或者: from gpiozero.Button import when_held [as 别名]
def main():
    global page
    global sd_image_version
    global r

    # Initialise some redis variables
    r.set("gsm:active", 0)
    r.set("wlan:active", 0)
    r.set("eth:active", 0)

    # First set up logging
    atexit.register(logging.shutdown)
    if not uselogfile:
        loghandler = logging.StreamHandler()
    else:
        logfile = "/var/log/emonpilcd/emonpilcd.log"
        print("emonPiLCD logging to:", logfile)
        loghandler = logging.handlers.RotatingFileHandler(logfile,
                                                          mode='a',
                                                          maxBytes=1000 * 1024,
                                                          backupCount=1,
                                                         )

    loghandler.setFormatter(logging.Formatter('%(asctime)s %(levelname)s %(message)s'))
    logger.addHandler(loghandler)
    logger.setLevel(logging.INFO)

    logger.info("Starting emonPiLCD V" + version)

    # Now check the LCD and initialise the object
    global lcd
    lcd = LCD(logger)
    lcd.backlight = 1

    # ------------------------------------------------------------------------------------
    # Discover & display emonPi SD card image version
    # ------------------------------------------------------------------------------------

    sd_card_image = subprocess.call("ls /boot | grep emonSD", shell=True)
    if not sd_card_image:  # if emonSD file exists
        sd_image_version = subprocess.check_output("ls /boot | grep emonSD", shell=True)
    else:
        sd_card_image = subprocess.call("ls /boot | grep emonpi", shell=True)
        if not sd_card_image:
            sd_image_version = subprocess.check_output("ls /boot | grep emonpi", shell=True)
        else:
            sd_image_version = "N/A "
    sd_image_version = sd_image_version.rstrip()

    lcd[0] = "emonPi Build:"
    lcd[1] = sd_image_version
    logger.info("SD card image build version: " + sd_image_version)

    # Set up the buttons and install handlers

    # emonPi LCD push button Pin 16 GPIO 23
    # Uses gpiozero library to handle short and long press https://gpiozero.readthedocs.io/en/stable/api_input.html?highlight=button
    # push_btn = Button(23, pull_up=False, hold_time=5, bounce_time=0.1)
    # No bounce time increases response time but may result in switch bouncing...
    logger.info("Attaching push button interrupt...")
    try:
        push_btn = Button(23, pull_up=False, hold_time=5)
        push_btn.when_pressed = buttonPress
        push_btn.when_held = buttonPressLong
    except:
        logger.error("Failed to attach LCD push button interrupt...")

    logger.info("Attaching shutdown button interrupt...")
    try:
        shut_btn = Button(17, pull_up=False, hold_time=5)
        shut_btn.when_pressed = preShutdown
        shut_btn.when_held = shutdown
    except:
        logger.error("Failed to attach shutdown button interrupt...")


    logger.info("Connecting to redis server...")
    # We wait here until redis has successfully started up
    while True:
        try:
            r.client_list()
            break
        except redis.ConnectionError:
            logger.error("waiting for redis-server to start...")
            time.sleep(1.0)
    logger.info("Connected to redis")

    logger.info("Connecting to MQTT Server: " + mqtt_host + " on port: " + str(mqtt_port) + " with user: " + mqtt_user)

    def on_message(client, userdata, msg):
        if mqtt_feed1_topic in msg.topic:
            r.set("feed1", msg.payload)

        if mqtt_feed2_topic in msg.topic:
            r.set("feed2", msg.payload)

        if mqtt_emonpi_topic in msg.topic:
            r.set("basedata", msg.payload)

    def on_connect(client, userdata, flags, rc):
#.........这里部分代码省略.........

# 需要导入模块: from gpiozero import Button [as 别名]
# 或者: from gpiozero.Button import when_held [as 别名]
## simple script to monitor a gpio pin with attached button
## and shutdown pi when pressed for > 2 seconds
## must be run as root or via sudo

# imports
from gpiozero import Button
from os import system
from time import sleep

# config
PIN = 17
PULL_UP = True
HOLD_TIME = 2

# functions
def btn_held():
    # respond to long press on button
    system("poweroff")

# do stuff
if __name__ == '__main__':
    pbutton = Button(pin=PIN,
                     pull_up=PULL_UP,
                     hold_time=HOLD_TIME,
                     hold_repeat=False)
    pbutton.when_held = btn_held

    while True:
       sleep(1)