diff --git a/README.md b/README.md
index be2181b..47d5128 100644
--- a/README.md
+++ b/README.md
@@ -120,7 +120,7 @@ following settings:
 
 ```bash
 sudo raspi-config --expand-rootfs
-sudo sed -i s/#dtparam=spi=on/dtparam=spi=on/ /boot/config.txt
+sudo sed -i s/#dtparam=spi=on/dtparam=spi=on/ /boot/firmware/config.txt
 sudo dpkg-reconfigure tzdata
 
 # If you have the 12.48" display, these steps are also required:
diff --git a/inkycal/display/drivers/epdconfig.py b/inkycal/display/drivers/epdconfig.py
index c21941f..2eaddf4 100644
--- a/inkycal/display/drivers/epdconfig.py
+++ b/inkycal/display/drivers/epdconfig.py
@@ -124,156 +124,7 @@ class RaspberryPi:
             self.GPIO_BUSY_PIN.close()
 
 
-class JetsonNano:
-    # Pin definition
-    RST_PIN = 17
-    DC_PIN = 25
-    CS_PIN = 8
-    BUSY_PIN = 24
-    PWR_PIN = 18
-
-    def __init__(self):
-        import ctypes
-        find_dirs = [
-            os.path.dirname(os.path.realpath(__file__)),
-            '/usr/local/lib',
-            '/usr/lib',
-        ]
-        self.SPI = None
-        for find_dir in find_dirs:
-            so_filename = os.path.join(find_dir, 'sysfs_software_spi.so')
-            if os.path.exists(so_filename):
-                self.SPI = ctypes.cdll.LoadLibrary(so_filename)
-                break
-        if self.SPI is None:
-            raise RuntimeError('Cannot find sysfs_software_spi.so')
-
-        import Jetson.GPIO
-        self.GPIO = Jetson.GPIO
-
-    def digital_write(self, pin, value):
-        self.GPIO.output(pin, value)
-
-    def digital_read(self, pin):
-        return self.GPIO.input(self.BUSY_PIN)
-
-    def delay_ms(self, delaytime):
-        time.sleep(delaytime / 1000.0)
-
-    def spi_writebyte(self, data):
-        self.SPI.SYSFS_software_spi_transfer(data[0])
-
-    def spi_writebyte2(self, data):
-        for i in range(len(data)):
-            self.SPI.SYSFS_software_spi_transfer(data[i])
-
-    def module_init(self):
-        self.GPIO.setmode(self.GPIO.BCM)
-        self.GPIO.setwarnings(False)
-        self.GPIO.setup(self.RST_PIN, self.GPIO.OUT)
-        self.GPIO.setup(self.DC_PIN, self.GPIO.OUT)
-        self.GPIO.setup(self.CS_PIN, self.GPIO.OUT)
-        self.GPIO.setup(self.PWR_PIN, self.GPIO.OUT)
-        self.GPIO.setup(self.BUSY_PIN, self.GPIO.IN)
-
-        self.GPIO.output(self.PWR_PIN, 1)
-
-        self.SPI.SYSFS_software_spi_begin()
-        return 0
-
-    def module_exit(self):
-        logger.debug("spi end")
-        self.SPI.SYSFS_software_spi_end()
-
-        logger.debug("close 5V, Module enters 0 power consumption ...")
-        self.GPIO.output(self.RST_PIN, 0)
-        self.GPIO.output(self.DC_PIN, 0)
-        self.GPIO.output(self.PWR_PIN, 0)
-
-        self.GPIO.cleanup([self.RST_PIN, self.DC_PIN, self.CS_PIN, self.BUSY_PIN, self.PWR_PIN])
-
-
-class SunriseX3:
-    # Pin definition
-    RST_PIN = 17
-    DC_PIN = 25
-    CS_PIN = 8
-    BUSY_PIN = 24
-    PWR_PIN = 18
-    Flag = 0
-
-    def __init__(self):
-        import spidev
-        import Hobot.GPIO
-
-        self.GPIO = Hobot.GPIO
-        self.SPI = spidev.SpiDev()
-
-    def digital_write(self, pin, value):
-        self.GPIO.output(pin, value)
-
-    def digital_read(self, pin):
-        return self.GPIO.input(pin)
-
-    def delay_ms(self, delaytime):
-        time.sleep(delaytime / 1000.0)
-
-    def spi_writebyte(self, data):
-        self.SPI.writebytes(data)
-
-    def spi_writebyte2(self, data):
-        # for i in range(len(data)):
-        #     self.SPI.writebytes([data[i]])
-        self.SPI.xfer3(data)
-
-    def module_init(self):
-        if self.Flag == 0:
-            self.Flag = 1
-            self.GPIO.setmode(self.GPIO.BCM)
-            self.GPIO.setwarnings(False)
-            self.GPIO.setup(self.RST_PIN, self.GPIO.OUT)
-            self.GPIO.setup(self.DC_PIN, self.GPIO.OUT)
-            self.GPIO.setup(self.CS_PIN, self.GPIO.OUT)
-            self.GPIO.setup(self.PWR_PIN, self.GPIO.OUT)
-            self.GPIO.setup(self.BUSY_PIN, self.GPIO.IN)
-
-            self.GPIO.output(self.PWR_PIN, 1)
-
-            # SPI device, bus = 0, device = 0
-            self.SPI.open(2, 0)
-            self.SPI.max_speed_hz = 4000000
-            self.SPI.mode = 0b00
-            return 0
-        else:
-            return 0
-
-    def module_exit(self):
-        logger.debug("spi end")
-        self.SPI.close()
-
-        logger.debug("close 5V, Module enters 0 power consumption ...")
-        self.Flag = 0
-        self.GPIO.output(self.RST_PIN, 0)
-        self.GPIO.output(self.DC_PIN, 0)
-        self.GPIO.output(self.PWR_PIN, 0)
-
-        self.GPIO.cleanup([self.RST_PIN, self.DC_PIN, self.CS_PIN, self.BUSY_PIN], self.PWR_PIN)
-
-
-if sys.version_info[0] == 2:
-    process = subprocess.Popen("cat /proc/cpuinfo | grep Raspberry", shell=True, stdout=subprocess.PIPE)
-else:
-    process = subprocess.Popen("cat /proc/cpuinfo | grep Raspberry", shell=True, stdout=subprocess.PIPE, text=True)
-output, _ = process.communicate()
-if sys.version_info[0] == 2:
-    output = output.decode(sys.stdout.encoding)
-
-if "Raspberry" in output:
-    implementation = RaspberryPi()
-elif os.path.exists('/sys/bus/platform/drivers/gpio-x3'):
-    implementation = SunriseX3()
-else:
-    implementation = JetsonNano()
+implementation = RaspberryPi()
 
 for func in [x for x in dir(implementation) if not x.startswith('_')]:
     setattr(sys.modules[__name__], func, getattr(implementation, func))