diff --git a/fan.py b/fan.py
new file mode 100644
index 0000000..9270eb2
--- /dev/null
+++ b/fan.py
@@ -0,0 +1,108 @@
+#!/usr/bin/env python3
+import os.path
+import time
+import traceback
+import threading
+
+import gpiod
+
+import misc
+
+pin = None
+
+
+class Pwm:
+    def __init__(self, chip):
+        self.period_value = None
+        try:
+            int(chip)
+            chip = f'pwmchip{chip}'
+        except ValueError:
+            pass
+        self.filepath = f"/sys/class/pwm/{chip}/pwm0/"
+        try:
+            with open(f"/sys/class/pwm/{chip}/export", 'w') as f:
+                f.write('0')
+        except OSError:
+            print("Waring: init pwm error")
+            traceback.print_exc()
+
+    def period(self, ns: int):
+        self.period_value = ns
+        with open(os.path.join(self.filepath, 'period'), 'w') as f:
+            f.write(str(ns))
+
+    def period_us(self, us: int):
+        self.period(us * 1000)
+
+    def enable(self, t: bool):
+        with open(os.path.join(self.filepath, 'enable'), 'w') as f:
+            f.write(f"{int(t)}")
+
+    def write(self, duty: float):
+        assert self.period_value, "The Period is not set."
+        with open(os.path.join(self.filepath, 'duty_cycle'), 'w') as f:
+            f.write(f"{int(self.period_value * duty)}")
+
+
+class Gpio:
+
+    def tr(self):
+        while True:
+            self.line.set_value(1)
+            time.sleep(self.value[0])
+            self.line.set_value(0)
+            time.sleep(self.value[1])
+
+    def __init__(self, period_s):
+        self.line = gpiod.Chip(os.environ['FAN_CHIP']).get_line(int(os.environ['FAN_LINE']))
+        self.line.request(consumer='fan', type=gpiod.LINE_REQ_DIR_OUT)
+        self.value = [period_s / 2, period_s / 2]
+        self.period_s = period_s
+        self.thread = threading.Thread(target=self.tr, daemon=True)
+        self.thread.start()
+
+    def write(self, duty):
+        self.value[1] = duty * self.period_s
+        self.value[0] = self.period_s - self.value[1]
+
+
+def read_temp():
+    with open('/sys/class/thermal/thermal_zone0/temp') as f:
+        t = int(f.read().strip()) / 1000.0
+    return t
+
+
+def get_dc(cache={}):
+    if misc.conf['run'].value == 0:
+        return 0.999
+
+    if time.time() - cache.get('time', 0) > 60:
+        cache['time'] = time.time()
+        cache['dc'] = misc.fan_temp2dc(read_temp())
+
+    return cache['dc']
+
+
+def change_dc(dc, cache={}):
+    if dc != cache.get('dc'):
+        cache['dc'] = dc
+        pin.write(dc)
+
+
+def running():
+    global pin
+    if os.environ['HARDWARE_PWM'] == '1':
+        chip = os.environ['PWMCHIP']
+        pin = Pwm(chip)
+        pin.period_us(40)
+        pin.enable(True)
+    else:
+        pin = Gpio(0.025)
+    while True:
+        change_dc(get_dc())
+        time.sleep(1)
+
+
+if __name__ == '__main__':
+    running()
diff --git a/fonts/DejaVuSansMono-Bold.ttf b/fonts/DejaVuSansMono-Bold.ttf
new file mode 100644
index 0000000..34314f6
Binary files /dev/null and b/fonts/DejaVuSansMono-Bold.ttf differ
diff --git a/fonts/DejaVuSansMono.ttf b/fonts/DejaVuSansMono.ttf
new file mode 100644
index 0000000..da5abdd
Binary files /dev/null and b/fonts/DejaVuSansMono.ttf differ
diff --git a/fonts/NotoSansMono-Bold.ttf b/fonts/NotoSansMono-Bold.ttf
new file mode 100644
index 0000000..a2a030f
Binary files /dev/null and b/fonts/NotoSansMono-Bold.ttf differ
diff --git a/fonts/NotoSansMono-Regular.ttf b/fonts/NotoSansMono-Regular.ttf
new file mode 100644
index 0000000..cf8607e
Binary files /dev/null and b/fonts/NotoSansMono-Regular.ttf differ
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..f67c8ee
--- /dev/null
+++ b/main.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+import queue
+import threading
+import traceback
+
+import fan
+import misc
+
+try:
+    import oled
+
+    top_board = True
+except Exception as ex:
+    traceback.print_exc()
+    top_board = False
+
+q = queue.Queue()
+lock = threading.Lock()
+
+action = {
+    'none': lambda: 'nothing',
+    'slider': lambda: oled.slider(lock),
+    'switch': lambda: misc.fan_switch(),
+    'reboot': lambda: misc.check_call('reboot'),
+    'poweroff': lambda: misc.check_call('poweroff'),
+}
+
+
+def receive_key(q):
+    while True:
+        func = misc.get_func(q.get())
+        action[func]()
+
+
+if __name__ == '__main__':
+
+    if top_board:
+        oled.welcome()
+        p0 = threading.Thread(target=receive_key, args=(q,), daemon=True)
+        p1 = threading.Thread(target=misc.watch_key, args=(q,), daemon=True)
+        p2 = threading.Thread(target=oled.auto_slider, args=(lock,), daemon=True)
+        p3 = threading.Thread(target=fan.running, daemon=True)
+
+        p0.start()
+        p1.start()
+        p2.start()
+        p3.start()
+        try:
+            p3.join()
+        except KeyboardInterrupt:
+            print("GoodBye ~")
+            oled.goodbye()
+
+    else:
+        p3 = threading.Thread(target=fan.running, daemon=False)
+        p3.start()
diff --git a/misc.py b/misc.py
new file mode 100644
index 0000000..bc25894
--- /dev/null
+++ b/misc.py
@@ -0,0 +1,167 @@
+#!/usr/bin/env python3
+import re
+import os
+import time
+import subprocess
+import multiprocessing as mp
+import traceback
+
+import gpiod
+from configparser import ConfigParser
+from collections import defaultdict, OrderedDict
+
+cmds = {
+    'blk': "lsblk | awk '{print $1}'",
+    'up': "echo Uptime: `uptime | sed 's/.*up \\([^,]*\\), .*/\\1/'`",
+    'temp': "cat /sys/class/thermal/thermal_zone0/temp",
+    'ip': "hostname -I | awk '{printf \"IP %s\", $1}'",
+    'cpu': "uptime | awk '{printf \"CPU Load: %.2f\", $(NF-2)}'",
+    'men': "free -m | awk 'NR==2{printf \"Mem: %s/%sMB\", $3,$2}'",
+    'disk': "df -h | awk '$NF==\"/\"{printf \"Disk: %d/%dGB %s\", $3,$2,$5}'"
+}
+
+lv2dc = OrderedDict({'lv3': 0, 'lv2': 0.25, 'lv1': 0.5, 'lv0': 0.75})
+
+
+def check_output(cmd):
+    return subprocess.check_output(cmd, shell=True).decode().strip()
+
+
+def check_call(cmd):
+    return subprocess.check_call(cmd, shell=True)
+
+
+def get_blk():
+    conf['disk'] = [x for x in check_output(cmds['blk']).strip().split('\n') if x.startswith('sd')]
+
+
+def get_info(s):
+    return check_output(cmds[s])
+
+
+def get_cpu_temp():
+    t = float(get_info('temp')) / 1000
+    if conf['oled']['f-temp']:
+        temp = "CPU Temp: {:.0f}°F".format(t * 1.8 + 32)
+    else:
+        temp = "CPU Temp: {:.1f}°C".format(t)
+    return temp
+
+
+def read_conf():
+    conf = defaultdict(dict)
+
+    try:
+        cfg = ConfigParser()
+        cfg.read('/etc/rockpi-penta.conf')
+        # fan
+        conf['fan']['lv0'] = cfg.getfloat('fan', 'lv0')
+        conf['fan']['lv1'] = cfg.getfloat('fan', 'lv1')
+        conf['fan']['lv2'] = cfg.getfloat('fan', 'lv2')
+        conf['fan']['lv3'] = cfg.getfloat('fan', 'lv3')
+        # key
+        conf['key']['click'] = cfg.get('key', 'click')
+        conf['key']['twice'] = cfg.get('key', 'twice')
+        conf['key']['press'] = cfg.get('key', 'press')
+        # time
+        conf['time']['twice'] = cfg.getfloat('time', 'twice')
+        conf['time']['press'] = cfg.getfloat('time', 'press')
+        # other
+        conf['slider']['auto'] = cfg.getboolean('slider', 'auto')
+        conf['slider']['time'] = cfg.getfloat('slider', 'time')
+        conf['oled']['rotate'] = cfg.getboolean('oled', 'rotate')
+        conf['oled']['f-temp'] = cfg.getboolean('oled', 'f-temp')
+    except Exception:
+        traceback.print_exc()
+        # fan
+        conf['fan']['lv0'] = 35
+        conf['fan']['lv1'] = 40
+        conf['fan']['lv2'] = 45
+        conf['fan']['lv3'] = 50
+        # key
+        conf['key']['click'] = 'slider'
+        conf['key']['twice'] = 'switch'
+        conf['key']['press'] = 'none'
+        # time
+        conf['time']['twice'] = 0.7  # second
+        conf['time']['press'] = 1.8
+        # other
+        conf['slider']['auto'] = True
+        conf['slider']['time'] = 10  # second
+        conf['oled']['rotate'] = False
+        conf['oled']['f-temp'] = False
+
+    return conf
+
+
+def read_key(pattern, size):
+    CHIP_NAME = os.environ['BUTTON_CHIP']
+    LINE_NUMBER = os.environ['BUTTON_LINE']
+
+    s = ''
+    chip = gpiod.Chip(str(CHIP_NAME))
+    line = chip.get_line(int(LINE_NUMBER))
+    line.request(consumer='hat_button', type=gpiod.LINE_REQ_DIR_OUT)
+    line.set_value(1)
+
+    while True:
+        s = s[-size:] + str(line.get_value())
+        for t, p in pattern.items():
+            if p.match(s):
+                return t
+        time.sleep(0.1)
+
+
+def watch_key(q=None):
+    size = int(conf['time']['press'] * 10)
+    wait = int(conf['time']['twice'] * 10)
+    pattern = {
+        'click': re.compile(r'1+0+1{%d,}' % wait),
+        'twice': re.compile(r'1+0+1+0+1{3,}'),
+        'press': re.compile(r'1+0{%d,}' % size),
+    }
+
+    while True:
+        q.put(read_key(pattern, size))
+
+
+def get_disk_info(cache={}):
+    if not cache.get('time') or time.time() - cache['time'] > 30:
+        info = {}
+        cmd = "df -h | awk '$NF==\"/\"{printf \"%s\", $5}'"
+        info['root'] = check_output(cmd)
+        for x in conf['disk']:
+            cmd = "df -Bg | awk '$1==\"/dev/{}\" {{printf \"%s\", $5}}'".format(x)
+            info[x] = check_output(cmd)
+        cache['info'] = list(zip(*info.items()))
+        cache['time'] = time.time()
+
+    return cache['info']
+
+
+def slider_next(pages):
+    conf['idx'].value += 1
+    return pages[conf['idx'].value % len(pages)]
+
+
+def slider_sleep():
+    time.sleep(conf['slider']['time'])
+
+
+def fan_temp2dc(t):
+    for lv, dc in lv2dc.items():
+        if t >= conf['fan'][lv]:
+            return dc
+    return 0.999
+
+
+def fan_switch():
+    conf['run'].value = not conf['run'].value
+
+
+def get_func(key):
+    return conf['key'].get(key, 'none')
+
+
+conf = {'disk': [], 'idx': mp.Value('d', -1), 'run': mp.Value('d', 1)}
+conf.update(read_conf())
diff --git a/oled.py b/oled.py
new file mode 100644
index 0000000..95af7a8
--- /dev/null
+++ b/oled.py
@@ -0,0 +1,118 @@
+#!/usr/bin/python3
+import os
+import time
+
+import adafruit_ssd1306
+import board
+import digitalio
+import busio
+from PIL import Image
+from PIL import ImageDraw
+from PIL import ImageFont
+import multiprocessing as mp
+
+import misc
+
+font = {
+    '10': ImageFont.truetype('fonts/DejaVuSansMono-Bold.ttf', 10),
+    '11': ImageFont.truetype('fonts/DejaVuSansMono-Bold.ttf', 11),
+    '12': ImageFont.truetype('fonts/DejaVuSansMono-Bold.ttf', 12),
+    '14': ImageFont.truetype('fonts/DejaVuSansMono-Bold.ttf', 14),
+}
+
+
+def disp_init():
+    RESET = getattr(board.pin, os.environ['OLED_RESET'])
+    i2c = busio.I2C(getattr(board.pin, os.environ['SCL']), getattr(board.pin, os.environ['SDA']))
+    disp = adafruit_ssd1306.SSD1306_I2C(128, 32, i2c, reset=digitalio.DigitalInOut(RESET))
+    disp.fill(0)
+    disp.show()
+    return disp
+
+
+disp = disp_init()
+
+image = Image.new('1', (disp.width, disp.height))
+draw = ImageDraw.Draw(image)
+
+
+def disp_show():
+    im = image.rotate(180) if misc.conf['oled']['rotate'] else image
+    disp.image(im)
+    disp.write_framebuf()
+    draw.rectangle((0, 0, disp.width, disp.height), outline=0, fill=0)
+
+
+def welcome():
+    draw.text((0, 0), 'ROCKPi SATA HAT', font=font['14'], fill=255)
+    draw.text((32, 16), 'Loading...', font=font['12'], fill=255)
+    disp_show()
+
+
+def goodbye():
+    draw.text((32, 8), 'Good Bye ~', font=font['14'], fill=255)
+    disp_show()
+    time.sleep(2)
+    disp_show()  # clear
+
+
+def put_disk_info():
+    k, v = misc.get_disk_info()
+    text1 = 'Disk: {} {}'.format(k[0], v[0])
+
+    if len(k) == 5:
+        text2 = '{} {}  {} {}'.format(k[1], v[1], k[2], v[2])
+        text3 = '{} {}  {} {}'.format(k[3], v[3], k[4], v[4])
+        page = [
+            {'xy': (0, -2), 'text': text1, 'fill': 255, 'font': font['11']},
+            {'xy': (0, 10), 'text': text2, 'fill': 255, 'font': font['11']},
+            {'xy': (0, 21), 'text': text3, 'fill': 255, 'font': font['11']},
+        ]
+    elif len(k) == 3:
+        text2 = '{} {}  {} {}'.format(k[1], v[1], k[2], v[2])
+        page = [
+            {'xy': (0, 2), 'text': text1, 'fill': 255, 'font': font['12']},
+            {'xy': (0, 18), 'text': text2, 'fill': 255, 'font': font['12']},
+        ]
+    else:
+        page = [{'xy': (0, 2), 'text': text1, 'fill': 255, 'font': font['14']}]
+
+    return page
+
+
+def gen_pages():
+    pages = {
+        0: [
+            {'xy': (0, -2), 'text': misc.get_info('up'), 'fill': 255, 'font': font['11']},
+            {'xy': (0, 10), 'text': misc.get_cpu_temp(), 'fill': 255, 'font': font['11']},
+            {'xy': (0, 21), 'text': misc.get_info('ip'), 'fill': 255, 'font': font['11']},
+        ],
+        1: [
+            {'xy': (0, 2), 'text': misc.get_info('cpu'), 'fill': 255, 'font': font['12']},
+            {'xy': (0, 18), 'text': misc.get_info('men'), 'fill': 255, 'font': font['12']},
+        ],
+        2: put_disk_info()
+    }
+
+    return pages
+
+
+def slider(lock):
+    with lock:
+        for item in misc.slider_next(gen_pages()):
+            draw.text(**item)
+        disp_show()
+
+
+def auto_slider(lock):
+    while misc.conf['slider']['auto']:
+        slider(lock)
+        misc.slider_sleep()
+    else:
+        slider(lock)
+
+
+if __name__ == '__main__':
+    # for test
+    lock = mp.Lock()
+    auto_slider(lock)