diff --git a/Code/Python_Code/07.1.1_ADC/ADCDevice.py b/Code/Python_Code/07.1.1_ADC/ADCDevice.py
new file mode 100644
index 0000000..6319305
--- /dev/null
+++ b/Code/Python_Code/07.1.1_ADC/ADCDevice.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+########################################################################
+# Filename    : ADCDevice.py
+# Description : Freenove ADC Module library.
+# Author      : www.freenove.com
+# modification: 2020/04/21
+########################################################################
+
+import smbus
+
+class ADCDevice(object):
+    def __init__(self):
+        self.cmd = 0
+        self.address = 0
+        self.bus=smbus.SMBus(1)
+        # print("ADCDevice init")
+        
+    def detectI2C(self,addr):
+        try:
+            self.bus.write_byte(addr,0)
+            print("Found device in address 0x%x"%(addr))
+            return True
+        except:
+            print("Not found device in address 0x%x"%(addr))
+            return False
+            
+    def close(self):
+        self.bus.close()
+        
+class PCF8591(ADCDevice):
+    def __init__(self):
+        super(PCF8591, self).__init__()
+        self.cmd = 0x40     # The default command for PCF8591 is 0x40.
+        self.address = 0x48 # 0x48 is the default i2c address for PCF8591 Module.
+        
+    def analogRead(self, chn): # PCF8591 has 4 ADC input pins, chn:0,1,2,3
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        return value
+    
+    def analogWrite(self,value): # write DAC value
+        self.bus.write_byte_data(address,cmd,value)	
+
+class ADS7830(ADCDevice):
+    def __init__(self):
+        super(ADS7830, self).__init__()
+        self.cmd = 0x84
+        self.address = 0x4b # 0x4b is the default i2c address for ADS7830 Module.   
+        
+    def analogRead(self, chn): # ADS7830 has 8 ADC input pins, chn:0,1,2,3,4,5,6,7
+        value = self.bus.read_byte_data(self.address, self.cmd|(((chn<<2 | chn>>1)&0x07)<<4))
+        return value
diff --git a/Code/Python_Code/08.1.1_Softlight/ADCDevice.py b/Code/Python_Code/08.1.1_Softlight/ADCDevice.py
new file mode 100644
index 0000000..6319305
--- /dev/null
+++ b/Code/Python_Code/08.1.1_Softlight/ADCDevice.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+########################################################################
+# Filename    : ADCDevice.py
+# Description : Freenove ADC Module library.
+# Author      : www.freenove.com
+# modification: 2020/04/21
+########################################################################
+
+import smbus
+
+class ADCDevice(object):
+    def __init__(self):
+        self.cmd = 0
+        self.address = 0
+        self.bus=smbus.SMBus(1)
+        # print("ADCDevice init")
+        
+    def detectI2C(self,addr):
+        try:
+            self.bus.write_byte(addr,0)
+            print("Found device in address 0x%x"%(addr))
+            return True
+        except:
+            print("Not found device in address 0x%x"%(addr))
+            return False
+            
+    def close(self):
+        self.bus.close()
+        
+class PCF8591(ADCDevice):
+    def __init__(self):
+        super(PCF8591, self).__init__()
+        self.cmd = 0x40     # The default command for PCF8591 is 0x40.
+        self.address = 0x48 # 0x48 is the default i2c address for PCF8591 Module.
+        
+    def analogRead(self, chn): # PCF8591 has 4 ADC input pins, chn:0,1,2,3
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        return value
+    
+    def analogWrite(self,value): # write DAC value
+        self.bus.write_byte_data(address,cmd,value)	
+
+class ADS7830(ADCDevice):
+    def __init__(self):
+        super(ADS7830, self).__init__()
+        self.cmd = 0x84
+        self.address = 0x4b # 0x4b is the default i2c address for ADS7830 Module.   
+        
+    def analogRead(self, chn): # ADS7830 has 8 ADC input pins, chn:0,1,2,3,4,5,6,7
+        value = self.bus.read_byte_data(self.address, self.cmd|(((chn<<2 | chn>>1)&0x07)<<4))
+        return value
diff --git a/Code/Python_Code/09.1.1_ColorfulSoftlight/ADCDevice.py b/Code/Python_Code/09.1.1_ColorfulSoftlight/ADCDevice.py
new file mode 100644
index 0000000..6319305
--- /dev/null
+++ b/Code/Python_Code/09.1.1_ColorfulSoftlight/ADCDevice.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+########################################################################
+# Filename    : ADCDevice.py
+# Description : Freenove ADC Module library.
+# Author      : www.freenove.com
+# modification: 2020/04/21
+########################################################################
+
+import smbus
+
+class ADCDevice(object):
+    def __init__(self):
+        self.cmd = 0
+        self.address = 0
+        self.bus=smbus.SMBus(1)
+        # print("ADCDevice init")
+        
+    def detectI2C(self,addr):
+        try:
+            self.bus.write_byte(addr,0)
+            print("Found device in address 0x%x"%(addr))
+            return True
+        except:
+            print("Not found device in address 0x%x"%(addr))
+            return False
+            
+    def close(self):
+        self.bus.close()
+        
+class PCF8591(ADCDevice):
+    def __init__(self):
+        super(PCF8591, self).__init__()
+        self.cmd = 0x40     # The default command for PCF8591 is 0x40.
+        self.address = 0x48 # 0x48 is the default i2c address for PCF8591 Module.
+        
+    def analogRead(self, chn): # PCF8591 has 4 ADC input pins, chn:0,1,2,3
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        return value
+    
+    def analogWrite(self,value): # write DAC value
+        self.bus.write_byte_data(address,cmd,value)	
+
+class ADS7830(ADCDevice):
+    def __init__(self):
+        super(ADS7830, self).__init__()
+        self.cmd = 0x84
+        self.address = 0x4b # 0x4b is the default i2c address for ADS7830 Module.   
+        
+    def analogRead(self, chn): # ADS7830 has 8 ADC input pins, chn:0,1,2,3,4,5,6,7
+        value = self.bus.read_byte_data(self.address, self.cmd|(((chn<<2 | chn>>1)&0x07)<<4))
+        return value
diff --git a/Code/Python_Code/10.1.1_Nightlamp/ADCDevice.py b/Code/Python_Code/10.1.1_Nightlamp/ADCDevice.py
new file mode 100644
index 0000000..6319305
--- /dev/null
+++ b/Code/Python_Code/10.1.1_Nightlamp/ADCDevice.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+########################################################################
+# Filename    : ADCDevice.py
+# Description : Freenove ADC Module library.
+# Author      : www.freenove.com
+# modification: 2020/04/21
+########################################################################
+
+import smbus
+
+class ADCDevice(object):
+    def __init__(self):
+        self.cmd = 0
+        self.address = 0
+        self.bus=smbus.SMBus(1)
+        # print("ADCDevice init")
+        
+    def detectI2C(self,addr):
+        try:
+            self.bus.write_byte(addr,0)
+            print("Found device in address 0x%x"%(addr))
+            return True
+        except:
+            print("Not found device in address 0x%x"%(addr))
+            return False
+            
+    def close(self):
+        self.bus.close()
+        
+class PCF8591(ADCDevice):
+    def __init__(self):
+        super(PCF8591, self).__init__()
+        self.cmd = 0x40     # The default command for PCF8591 is 0x40.
+        self.address = 0x48 # 0x48 is the default i2c address for PCF8591 Module.
+        
+    def analogRead(self, chn): # PCF8591 has 4 ADC input pins, chn:0,1,2,3
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        return value
+    
+    def analogWrite(self,value): # write DAC value
+        self.bus.write_byte_data(address,cmd,value)	
+
+class ADS7830(ADCDevice):
+    def __init__(self):
+        super(ADS7830, self).__init__()
+        self.cmd = 0x84
+        self.address = 0x4b # 0x4b is the default i2c address for ADS7830 Module.   
+        
+    def analogRead(self, chn): # ADS7830 has 8 ADC input pins, chn:0,1,2,3,4,5,6,7
+        value = self.bus.read_byte_data(self.address, self.cmd|(((chn<<2 | chn>>1)&0x07)<<4))
+        return value
diff --git a/Code/Python_Code/11.1.1_Thermometer/ADCDevice.py b/Code/Python_Code/11.1.1_Thermometer/ADCDevice.py
new file mode 100644
index 0000000..6319305
--- /dev/null
+++ b/Code/Python_Code/11.1.1_Thermometer/ADCDevice.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+########################################################################
+# Filename    : ADCDevice.py
+# Description : Freenove ADC Module library.
+# Author      : www.freenove.com
+# modification: 2020/04/21
+########################################################################
+
+import smbus
+
+class ADCDevice(object):
+    def __init__(self):
+        self.cmd = 0
+        self.address = 0
+        self.bus=smbus.SMBus(1)
+        # print("ADCDevice init")
+        
+    def detectI2C(self,addr):
+        try:
+            self.bus.write_byte(addr,0)
+            print("Found device in address 0x%x"%(addr))
+            return True
+        except:
+            print("Not found device in address 0x%x"%(addr))
+            return False
+            
+    def close(self):
+        self.bus.close()
+        
+class PCF8591(ADCDevice):
+    def __init__(self):
+        super(PCF8591, self).__init__()
+        self.cmd = 0x40     # The default command for PCF8591 is 0x40.
+        self.address = 0x48 # 0x48 is the default i2c address for PCF8591 Module.
+        
+    def analogRead(self, chn): # PCF8591 has 4 ADC input pins, chn:0,1,2,3
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        return value
+    
+    def analogWrite(self,value): # write DAC value
+        self.bus.write_byte_data(address,cmd,value)	
+
+class ADS7830(ADCDevice):
+    def __init__(self):
+        super(ADS7830, self).__init__()
+        self.cmd = 0x84
+        self.address = 0x4b # 0x4b is the default i2c address for ADS7830 Module.   
+        
+    def analogRead(self, chn): # ADS7830 has 8 ADC input pins, chn:0,1,2,3,4,5,6,7
+        value = self.bus.read_byte_data(self.address, self.cmd|(((chn<<2 | chn>>1)&0x07)<<4))
+        return value
diff --git a/Code/Python_Code/12.1.1_Joystick/ADCDevice.py b/Code/Python_Code/12.1.1_Joystick/ADCDevice.py
new file mode 100644
index 0000000..6319305
--- /dev/null
+++ b/Code/Python_Code/12.1.1_Joystick/ADCDevice.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+########################################################################
+# Filename    : ADCDevice.py
+# Description : Freenove ADC Module library.
+# Author      : www.freenove.com
+# modification: 2020/04/21
+########################################################################
+
+import smbus
+
+class ADCDevice(object):
+    def __init__(self):
+        self.cmd = 0
+        self.address = 0
+        self.bus=smbus.SMBus(1)
+        # print("ADCDevice init")
+        
+    def detectI2C(self,addr):
+        try:
+            self.bus.write_byte(addr,0)
+            print("Found device in address 0x%x"%(addr))
+            return True
+        except:
+            print("Not found device in address 0x%x"%(addr))
+            return False
+            
+    def close(self):
+        self.bus.close()
+        
+class PCF8591(ADCDevice):
+    def __init__(self):
+        super(PCF8591, self).__init__()
+        self.cmd = 0x40     # The default command for PCF8591 is 0x40.
+        self.address = 0x48 # 0x48 is the default i2c address for PCF8591 Module.
+        
+    def analogRead(self, chn): # PCF8591 has 4 ADC input pins, chn:0,1,2,3
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        return value
+    
+    def analogWrite(self,value): # write DAC value
+        self.bus.write_byte_data(address,cmd,value)	
+
+class ADS7830(ADCDevice):
+    def __init__(self):
+        super(ADS7830, self).__init__()
+        self.cmd = 0x84
+        self.address = 0x4b # 0x4b is the default i2c address for ADS7830 Module.   
+        
+    def analogRead(self, chn): # ADS7830 has 8 ADC input pins, chn:0,1,2,3,4,5,6,7
+        value = self.bus.read_byte_data(self.address, self.cmd|(((chn<<2 | chn>>1)&0x07)<<4))
+        return value
diff --git a/Code/Python_Code/13.1.1_Motor/ADCDevice.py b/Code/Python_Code/13.1.1_Motor/ADCDevice.py
new file mode 100644
index 0000000..6319305
--- /dev/null
+++ b/Code/Python_Code/13.1.1_Motor/ADCDevice.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+########################################################################
+# Filename    : ADCDevice.py
+# Description : Freenove ADC Module library.
+# Author      : www.freenove.com
+# modification: 2020/04/21
+########################################################################
+
+import smbus
+
+class ADCDevice(object):
+    def __init__(self):
+        self.cmd = 0
+        self.address = 0
+        self.bus=smbus.SMBus(1)
+        # print("ADCDevice init")
+        
+    def detectI2C(self,addr):
+        try:
+            self.bus.write_byte(addr,0)
+            print("Found device in address 0x%x"%(addr))
+            return True
+        except:
+            print("Not found device in address 0x%x"%(addr))
+            return False
+            
+    def close(self):
+        self.bus.close()
+        
+class PCF8591(ADCDevice):
+    def __init__(self):
+        super(PCF8591, self).__init__()
+        self.cmd = 0x40     # The default command for PCF8591 is 0x40.
+        self.address = 0x48 # 0x48 is the default i2c address for PCF8591 Module.
+        
+    def analogRead(self, chn): # PCF8591 has 4 ADC input pins, chn:0,1,2,3
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        value = self.bus.read_byte_data(self.address, self.cmd+chn)
+        return value
+    
+    def analogWrite(self,value): # write DAC value
+        self.bus.write_byte_data(address,cmd,value)	
+
+class ADS7830(ADCDevice):
+    def __init__(self):
+        super(ADS7830, self).__init__()
+        self.cmd = 0x84
+        self.address = 0x4b # 0x4b is the default i2c address for ADS7830 Module.   
+        
+    def analogRead(self, chn): # ADS7830 has 8 ADC input pins, chn:0,1,2,3,4,5,6,7
+        value = self.bus.read_byte_data(self.address, self.cmd|(((chn<<2 | chn>>1)&0x07)<<4))
+        return value