diff --git a/set_adc.py b/set_adc.py
index 8aabf0305a73eef6f9a3f7da3daadbf5b88cb9a4..ec48ff0af65d7a4d64cf18d0704b5e735a8808e9 100644
--- a/set_adc.py
+++ b/set_adc.py
@@ -1,11 +1,27 @@
 '''
+Copyright 2021 Stichting Nederlandse Wetenschappelijk Onderzoek Instituten,
+ASTRON Netherlands Institute for Radio Astronomy
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+ http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
 Set ADC
 
 '''
 import sys
 import time
 sys.path.insert(0,'.')
-from I2C_serial import *
+import os
+if os.name =="posix":
+    from I2C_serial_pi import *
+else:
+    from I2C_serial import *
 
 sleep_time=0.05
 CHECK_I2C_DEVICES = False
diff --git a/set_adc_tm.py b/set_adc_tm.py
index 4b1ff4ee5733cd740358a08b711ab39f4ee396a9..dc17bc1ba677ed6916f82b5a344eacc62b6a4d06 100644
--- a/set_adc_tm.py
+++ b/set_adc_tm.py
@@ -1,11 +1,27 @@
 '''
-Set ADC
+Copyright 2021 Stichting Nederlandse Wetenschappelijk Onderzoek Instituten,
+ASTRON Netherlands Institute for Radio Astronomy
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+ http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+Test script to write single registers of RCU2_ADC
 
 '''
 import sys
 import time
 sys.path.insert(0,'.')
-from I2C_serial import *
+import os
+if os.name =="posix":
+    from I2C_serial_pi import *
+else:
+    from I2C_serial import *
 
 sleep_time=0.05
 CHECK_I2C_DEVICES = False
diff --git a/set_clk.py b/set_clk.py
index bd6da619cee65456c9b8dfbe1144a68f6b3e76ab..cb1d565c74827e77467a403309459b6206fc5266 100644
--- a/set_clk.py
+++ b/set_clk.py
@@ -1,11 +1,27 @@
 '''
-Set ADC
+Copyright 2021 Stichting Nederlandse Wetenschappelijk Onderzoek Instituten,
+ASTRON Netherlands Institute for Radio Astronomy
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+ http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+Set PCC_CLK
 
 '''
 import sys
 import time
 sys.path.insert(0,'.')
-from I2C_serial import *
+import os
+if os.name =="posix":
+    from I2C_serial_pi import *
+else:
+    from I2C_serial import *
 
 sleep_time=0.05
 PWR_RST = False
diff --git a/set_clk_tm.py b/set_clk_tm.py
index eb0b02242b9ffc02c114a2fcb5eee902c275a2da..50b28a817a5f97ea1204ef3d5094177e6442aba9 100644
--- a/set_clk_tm.py
+++ b/set_clk_tm.py
@@ -1,11 +1,27 @@
 '''
-Set ADC
+Copyright 2021 Stichting Nederlandse Wetenschappelijk Onderzoek Instituten,
+ASTRON Netherlands Institute for Radio Astronomy
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+ http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+Test script to write single registers of PCC_CLK.
 
 '''
 import sys
 import time
 sys.path.insert(0,'.')
-from I2C_serial import *
+import os
+if os.name =="posix":
+    from I2C_serial_pi import *
+else:
+    from I2C_serial import *
 
 sleep_time=0.05
 PWR_RST = False