diff --git a/README.md b/README.md
index afdb5c9..52bc075 100644
--- a/README.md
+++ b/README.md
@@ -34,3 +34,28 @@ Example of launching the python script: `python3 script_gps.py 27.CSV Trajet.htm
 *Example of plotting OBD Speed*
 
 ## Gettig started with code
+ 
+The project uses the operating system [FreeRTOS](https://www.freertos.org/). It contains 4 tasks as showing the table below:
+
+|Task|Priority|Role|
+|:--:|:------:|:--:|
+|Task1|1|Collecting the OBD data with 1 sample/90ms|
+|Task2|1|Collecting GPS data(longitude, latitude, altitude, GPS speed) and IMU data (accelerometer, gyroscope and magnetometer along the 3 axes (X, Y, Z))|
+|Task3|1|Collecting the OBD data with 1 sample/60s|
+|Daemon Task|3|Writing data in SD card|
+
+Below is a table representing the various OBD data required, as well as how often they are taken:
+
+|Data description|OBD-II PID|1 sample/90ms|1 sample/60s|
+|:--------------:|:--------:|:-----------:|:----------:|
+|SPEED|0x0D|x||
+|AMBIENT_TEMP|0x46||x|
+|PID_RPM|0x0C|x||
+|ENGINE_REF_TORQUE|0x63|x||
+|PID_RUNTIME|0x1F||x|
+|BAROMETRIC|0x33||x|
+|FUEL_LEVEL|0x2F||x|
+|HYBRID_BATTERY_PERCENTAGE|0x5B||x|
+
+
+
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