diff --git a/README.md b/README.md
index ebf92f4..d703d37 100644
--- a/README.md
+++ b/README.md
@@ -28,8 +28,8 @@ Possible choices :
     * LSM6DS3
     * BMA456 <-- SELECTED i2c addr : 0x18 or 0x19 7 bit address, has the wrist tilt detection feature.
 * A magnetometer (possible choices):
-    * HMC5883L <-- SELECTED i2c addr : 0x1E 7 bit address, better soldering footprint
-    * QMC5883L
+    * HMC5883L <-- After reading some comparison articles between the HMC5883L and QMC5883L and the datasheets, the later seems better in term of perfomances.
+    * QMC5883L <-- SELECTED i2c addr : 0x0D 7 bit address, better soldering footprint
     * LSM303DLHC
     * BMM150 <-- Package with balls, hard to handle
 * An air pressure/temperature sensor (to display the altitude for example)
@@ -97,8 +97,15 @@ Requirements : 4 line serial interface in 8 bit mode with a dedicated Data/Comma
     * 1 menu list with icons.
 
 ## To do :
-* Write I2C drivers for the BMA456, BMP280 and HMC5883L.
-* Finish to design the settings page.
-* Test the charge circuit.
-* Draw the schematic.
-* Design the PCB.
+* Write I2C drivers for the :
+    * [ ] BMA456
+    * [ ] BMP280
+    * [X] QMC5883L
+* [ ] Write the init sequence for the GC9A01 LCD driver.
+* [ ] Finish to design the settings page.
+* [ ] Test the charge circuit.
+* Design and test the : 
+    * [ ] vibration moto circuit
+    * [ ] piezo buzzer circuit
+* [ ] Draw the schematic.
+* [ ] Design the PCB.
diff --git a/documentation/ICs datasheet/Datasheet-QMC5883L-1.0.pdf b/documentation/ICs datasheet/Datasheet-QMC5883L-1.0.pdf
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diff --git a/documentation/ICs datasheet/HMC5883L_3-Axis_Digital_Compass_IC.pdf b/documentation/ICs datasheet/HMC5883L_3-Axis_Digital_Compass_IC.pdf
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