diff --git a/README.md b/README.md
index ea89bcb..02a4a68 100644
--- a/README.md
+++ b/README.md
@@ -15,4 +15,9 @@ Then use a Qt interface to query the value in the arduino.
 
 Create an arduino driver, the corresponding sketch and upload it.
 Then use a Qt interface to query the value in the arduino periodically
-or plot it.
\ No newline at end of file
+or plot it.
+
+#### arduino-qt-toogle-led
+
+Create an arduino driver, the corresponding sketch and upload it.
+The use a Qt interface with ON OFF buttons to set an arduino LED.
diff --git a/arduino-qt-continuous/README.md b/arduino-qt-continuous/README.md
index c6145cc..f8670b1 100644
--- a/arduino-qt-continuous/README.md
+++ b/arduino-qt-continuous/README.md
@@ -1,87 +1,96 @@
-arduino-qt-continuous
-=====================
-
-This example shows:
-- how to build an instrument that communicates via
-exchanging text messages using arduino and lantz.
-- how to query that instrument periodically
-- how to plot the results in a chart
-
-
-Requirements
-------------
-
-- Install the latest version of lantz
-
-- Install arduino-cli
-  https://github.com/arduino/arduino-cli
-
-- (optionally) Install pyqtgraph if you want to run the run_plot example
-  
-- Copy all the content of this folder to your computer
-
-If you do not have the NI-VISA installed, you need to install `pyvisa-py`
-(the pure python backend for pyvisa) and tell lantz to use it by default
-
-In the command line:
-
-    pip install pyvisa-py
-    pip install pyserial
-    lantz config core.visa_backend '@py'
-
-
-Step 1: Create arduino sketch template
---------------------------------------
-
-In the console, go to the folder containing this project and execute the following
-command:
-
-    lantz ino new drivers:TemperatureSensor
-    
-This will generate a arduino sketch template for the class `TemperatureSensor`
-located in the `run` module. You will find it in the TemperatureSensor folder.
-It additionally creates a "packfile" named `TemperatureSensor.pack.yaml` that
-contains information to compile and upload the project.
-
-
-Step 2 (optional): Add your own code to the arduino sketch
-----------------------------------------------------------
-
-You can customize the arduino code by editing `inodriver_user.cpp` and 
-`inodriver_user.h` within the sketch folder. 
-
-You will find the following functions:
-
-- user_setup: this will be executed during the setup of the arduino just before starting
-  the communication with the serial command.
-  
-- user_loop: this will be executed every time the main loop is executed
-
-- ... and one function for each getter/setter you have in your lantz code.
-
-You can just use the default code to get working but dummy example.
-
-
-Step 3: Run it
---------------
- 
-In the console, go to the folder containing this project and execute the following
-command:
-
-    python run_display.py
-    
-    
-Step 4 (optional): Change something in the arduino sketch
----------------------------------------------------------
-
-Edit `inodriver_user.cpp`, for example to return 42.0 from `get_TEMP`
-and run the code again. Notice that lanz recompiles and upload the sketch!
-
-
-Step 5 (optional): Run the plotting example
--------------------------------------------
-
-In the console, go to the folder containing this project and execute the following
-command:
-
-    python run_plot.py
\ No newline at end of file
+arduino-qt-continuous
+=====================
+
+This example shows:
+- how to build an instrument that communicates via
+exchanging text messages using arduino and lantz.
+- how to query that instrument periodically
+- how to plot the results in a chart
+
+
+Requirements
+------------
+
+- Install the latest version of lantz
+
+- Install arduino-cli
+  https://github.com/arduino/arduino-cli
+
+  _windows:_ 
+  Make sure you included the arduino-cli in your enviroment variables PATH.
+  From the command prompt:
+   * Check your installation by doing `arduino-cli`
+   * Install the AVR dependencies `arduino-cli core install arduino:avr`
+
+
+- (optionally) Install pyqtgraph if you want to run the run_plot example
+  
+- Copy all the content of this folder to your computer
+
+If you do not have the NI-VISA installed, you need to install `pyvisa-py`
+(the pure python backend for pyvisa) and tell lantz to use it by default
+
+In the command line:
+
+    pip install pyvisa-py
+    pip install pyserial
+    lantz config core.visa_backend '@py'
+
+
+Step 1: Create arduino sketch template
+--------------------------------------
+
+In the console, go to the folder containing this project and execute the following
+command:
+
+    lantz ino new drivers:TemperatureSensor
+    
+This will generate a arduino sketch template for the class `TemperatureSensor`
+located in the `run` module. You will find it in the TemperatureSensor folder.
+It additionally creates a "packfile" named `TemperatureSensor.pack.yaml` that
+contains information to compile and upload the project.
+
+
+Step 2 (optional): Add your own code to the arduino sketch
+----------------------------------------------------------
+
+You can customize the arduino code by editing `inodriver_user.cpp` and 
+`inodriver_user.h` within the sketch folder. 
+
+You will find the following functions:
+
+- user_setup: this will be executed during the setup of the arduino just before starting
+  the communication with the serial command.
+  
+- user_loop: this will be executed every time the main loop is executed
+
+- ... and one function for each getter/setter you have in your lantz code.
+
+You can just use the default code to get working but dummy example.
+
+
+Step 3: Run it
+--------------
+ 
+In the console, go to the folder containing this project and execute the following
+command:
+
+    python run_display.py
+
+If you get a __json error__ read carfully the notes it states you should update the index using `arduino-cli core-update index`
+    
+    
+Step 4 (optional): Change something in the arduino sketch
+---------------------------------------------------------
+
+Edit `inodriver_user.cpp`, for example to return 42.0 from `get_TEMP`
+and run the code again. Notice that lanz recompiles and upload the sketch!
+
+
+Step 5 (optional): Run the plotting example
+-------------------------------------------
+
+In the console, go to the folder containing this project and execute the following
+command:
+
+    python run_plot.py
diff --git a/arduino-qt-simple/README.md b/arduino-qt-simple/README.md
index 82c4e09..fb31c17 100644
--- a/arduino-qt-simple/README.md
+++ b/arduino-qt-simple/README.md
@@ -1,72 +1,80 @@
-arduino-qt-simple
-=================
-
-This is a very simple example of how to build an instrument that communicates via
-exchanging text messages using arduino and lantz.
-
-Requirements
-------------
-
-- Install the latest version of lantz
-
-- Install arduino-cli
-  https://github.com/arduino/arduino-cli
-  
-- Copy all the content of this folder to your computer
-
-If you do not have the NI-VISA installed, you need to install `pyvisa-py`
-(the pure python backend for pyvisa) and tell lantz to use it by default
-
-In the command line:
-
-    pip install pyvisa-py
-    pip install pyserial
-    lantz config core.visa_backend '@py'
-
-
-Step 1: Create arduino sketch template
---------------------------------------
-
-In the console, go to the folder containing this project and execute the following
-command:
-
-    lantz ino new run:TemperatureSensor
-    
-This will generate a arduino sketch template for the class `TemperatureSensor`
-located in the `run` module. You will find it in the TemperatureSensor folder.
-It additionally creates a "packfile" named `TemperatureSensor.pack.yaml` that
-contains information to compile and upload the project.
-
-
-Step 2 (optional): Add your own code to the arduino sketch
-----------------------------------------------------------
-
-You can customize the arduino code by editing `inodriver_user.cpp` and 
-`inodriver_user.h` within the sketch folder. 
-
-You will find the following functions:
-
-- user_setup: this will be executed during the setup of the arduino just before starting
-  the communication with the serial command.
-  
-- user_loop: this will be executed every time the main loop is executed
-
-- ... and one function for each getter/setter you have in your lantz code.
-
-You can just use the default code to get working but dummy example.
-
-
-Step 3: Run it
---------------
- 
-In the console, go to the folder containing this project and execute the following
-command:
-
-    python run.py
-    
-    
-Step 4 (optional): Change something in the arduino sketch
----------------------------------------------------------
-
-Edit `inodriver_user.cpp`, for example to return 42.0 from `get_TEMP`
-and run the code again. Notice that lanz recompiles and upload the sketch!
\ No newline at end of file
+arduino-qt-simple
+=================
+
+This is a very simple example of how to build an instrument that communicates via
+exchanging text messages using arduino and lantz.
+
+Requirements
+------------
+
+- Install the latest version of lantz
+
+- Install arduino-cli
+  https://github.com/arduino/arduino-cli
+
+  _windows:_ 
+  Make sure you included the arduino-cli in your enviroment variables PATH.
+  From the command prompt:
+   * Check your installation by doing `arduino-cli`
+   * Install the AVR dependencies `arduino-cli core install arduino:avr`
+  
+- Copy all the content of this folder to your computer
+
+If you do not have the NI-VISA installed, you need to install `pyvisa-py`
+(the pure python backend for pyvisa) and tell lantz to use it by default
+
+In the command line:
+
+    pip install pyvisa-py
+    pip install pyserial
+    lantz config core.visa_backend @py
+
+
+Step 1: Create arduino sketch template
+--------------------------------------
+
+In the console, go to the folder containing this project and execute the following
+command:
+
+    lantz ino new run:TemperatureSensor
+    
+This will generate a arduino sketch template for the class `TemperatureSensor`
+located in the `run` module. You will find it in the TemperatureSensor folder.
+It additionally creates a "packfile" named `TemperatureSensor.pack.yaml` that
+contains information to compile and upload the project.
+
+
+Step 2 (optional): Add your own code to the arduino sketch
+----------------------------------------------------------
+
+You can customize the arduino code by editing `inodriver_user.cpp` and 
+`inodriver_user.h` within the sketch folder. 
+
+You will find the following functions:
+
+- user_setup: this will be executed during the setup of the arduino just before starting
+  the communication with the serial command.
+  
+- user_loop: this will be executed every time the main loop is executed
+
+- ... and one function for each getter/setter you have in your lantz code.
+
+You can just use the default code to get working but dummy example.
+
+
+Step 3: Run it
+--------------
+ 
+In the console, go to the folder containing this project and execute the following
+command:
+
+    python run.py
+    
+If you get a __json error__ read carfully the notes it states you should update the index using `arduino-cli core-update index`
+
+
+Step 4 (optional): Change something in the arduino sketch
+---------------------------------------------------------
+
+Edit `inodriver_user.cpp`, for example to return 42.0 from `get_TEMP`
+and run the code again. Notice that lanz recompiles and upload the sketch!
diff --git a/arduino-qt-toogle-led/README.md b/arduino-qt-toogle-led/README.md
index 0b40bc1..d8f754b 100644
--- a/arduino-qt-toogle-led/README.md
+++ b/arduino-qt-toogle-led/README.md
@@ -1,88 +1,109 @@
-arduino-qt-toogle-led
-=====================
-
-This is a very simple example of how to build an instrument that communicates via
-exchanging text messages using arduino and lantz.
-
-Requirements
-------------
-
-- Install the latest version of lantz
-
-- Install arduino-cli
-  https://github.com/arduino/arduino-cli
-  
-- Copy all the content of this folder to your computer
-
-If you do not have the NI-VISA installed, you need to install `pyvisa-py`
-(the pure python backend for pyvisa) and tell lantz to use it by default
-
-In the command line:
-
-    pip install pyvisa-py
-    pip install pyserial
-    lantz config core.visa_backend '@py'
-
-
-Step 1: Create arduino sketch template
---------------------------------------
-
-In the console, go to the folder containing this project and execute the following
-command:
-
-    lantz ino new run:TemperatureSensor
-    
-This will generate an arduino sketch template for the class `LEDDriver`
-located in the `run` module. You will find it in the LEDDriver just created directory.
-It additionally creates a "packfile" named `LEDDriver.pack.yaml` that
-contains information to compile and upload the project.
-
-
-Step 2: Add your own code to the arduino sketch
------------------------------------------------
-
-You can customize the arduino code by editing `inodriver_user.cpp` and 
-`inodriver_user.h` within the sketch directory created in step 1. 
-
-You will find the following functions:
-
-- user_setup: this will be executed during the setup of the arduino just before starting
-  the communication with the serial command.
-  
-- user_loop: this will be executed every time the main loop is executed
-
-- ... and one function for each getter/setter you have in your lantz code.
-
-In order to get the onboard LED turned on an off, we need to modify the 
-`inodriver_user.cpp` file in the following manner:
-```
-... stuff ...
-void user_setup() {
-   pinMode(13, OUTPUT);
-}
-... stuff ...
-int set_LED(int value) {
-   if (value>0)
-      digitalWrite(13, HIGH);
-   else
-      digitalWrite(13, LOW);
-   return 0;
-};
-... stuff ...
-```
-
-
-Step 3: Run it
---------------
- 
-In the console, go to the directory containing this project and execute the following
-command:
-
-    python run.py
-
-This should open the graphical interface with two buttons, one to turn the LED on
-and the other to turn the LED off. 
-
-<p align="center">
-  <img width="460" src="https://raw.githubusercontent.com/SengerM/examples/master/arduino-qt-toogle-led/img/1.png">
-</p>
+arduino-qt-toogle-led
+=====================
+
+This is a very simple example of how to build an instrument that communicates via
+exchanging text messages using arduino and lantz.
+
+Requirements
+------------
+
+- Install the latest version of lantz
+
+- Install arduino-cli
+  https://github.com/arduino/arduino-cli
+  
+  _windows:_ 
+  Make sure you included the arduino-cli in your enviroment variables PATH.
+  From the command prompt:
+   * Check your installation by doing `arduino-cli`
+   * Install the AVR dependencies `arduino-cli core install arduino:avr`
+
+  
+- Copy all the content of this folder to your computer
+
+If you do not have the NI-VISA installed, you need to install `pyvisa-py`
+(the pure python backend for pyvisa) and tell lantz to use it by default
+
+In the command line:
+
+    pip install pyvisa-py
+    pip install pyserial
+    lantz config core.visa_backend @py
+
+
+Step 1: Create arduino sketch template
+--------------------------------------
+
+In the console, go to the folder containing this project and execute the following
+command:
+
+    lantz ino new run:LEDDriver
+    
+This will generate an arduino sketch template for the class `LEDDriver`
+located in the `run` module. You will find it in the LEDDriver just created directory.
+It additionally creates a "packfile" named `LEDDriver.pack.yaml` that
+contains information to compile and upload the project.
+
+
+Step 2: Add your own code to the arduino sketch
+-----------------------------------------------
+
+You can customize the arduino code by editing `inodriver_user.cpp` and 
+`inodriver_user.h` within the sketch directory created in step 1. 
+
+You will find the following functions:
+
+- user_setup: this will be executed during the setup of the arduino just before starting
+  the communication with the serial command.
+  
+- user_loop: this will be executed every time the main loop is executed
+
+- ... and one function for each getter/setter you have in your lantz code.
+
+In order to get the onboard LED turned on an off, we need to modify the 
+`inodriver_user.cpp` file in the following manner:
+
+```c
+
+#include "inodriver_user.h"
+
+int ledPin = 13;
+
+void user_setup() {
+  pinMode(ledPin, OUTPUT);
+}
+
+void user_loop() {
+}
+// COMMAND: LED, FEAT: led
+int get_LED() {
+   return 0;
+};
+
+int set_LED(int value) {
+   if (value>0)
+      digitalWrite(ledPin, HIGH);
+   else
+      digitalWrite(ledPin, LOW);
+   return 0;
+};
+
+```
+
+
+Step 3: Run it
+--------------
+ 
+In the console, go to the directory containing this project and execute the following
+command:
+
+    python run.py
+
+This should open the graphical interface with two buttons, one to turn the LED on
+and the other to turn the LED off. 
+
+<p align="center">
+  <img width="460" src="https://raw.githubusercontent.com/SengerM/examples/master/arduino-qt-toogle-led/img/1.png">
+</p>
+
+If you get a __json error__ read carfully the notes it states you should update the index using `arduino-cli core-update index`