Merge branch 'document_i2c_addresses' into 'master'

Added a section about I2C address selection in README

See merge request MSO-SW/drivers/arduino/arduino-i2c-sdp!7

README.md

@@ -9,13 +9,12 @@ Click [here](https://sensirion.com/products/catalog/EK-P4/) to learn more about
 
 Click [here](https://sensirion.com/products/catalog/EK-P5/) to learn more about the SDP8xx series Sensor Evaluation Kit.
 
-
 # Installation
 
 To install, download the latest release as .zip file and add it to your
 [Arduino IDE](http://www.arduino.cc/en/main/software) via
 
-	Sketch => Include Library => Add .ZIP Library...
+    Sketch => Include Library => Add .ZIP Library...
 
 Don't forget to **install the dependencies** listed below the same way via `Add
 .ZIP Library`
@@ -24,8 +23,7 @@ Note: Installation via the Arduino Library Manager is coming soon.
 
 # Dependencies
 
-* [Sensirion Core](https://github.com/Sensirion/arduino-core)
-
+- [Sensirion Core](https://github.com/Sensirion/arduino-core)
 
 # Quick Start
 
@@ -34,25 +32,38 @@ Note: Installation via the Arduino Library Manager is coming soon.
    The pinout of the SDP Sensor board can be found in the
    data sheet.
 
-    * **VDD** of the SEK-SDP to the **3V3** of your Arduino board  (5V is also possible)
-    * **GND** of the SEK-SDP to the **GND** of your Arduino board
-    * **SCL** of the SEK-SDP to the **SCL** of your Arduino board
-    * **SDA** of the SEK-SDP to the **SDA** of your Arduino board
+   - **VDD** of the SEK-SDP to the **3V3** of your Arduino board (5V is also possible)
+   - **GND** of the SEK-SDP to the **GND** of your Arduino board
+   - **SCL** of the SEK-SDP to the **SCL** of your Arduino board
+   - **SDA** of the SEK-SDP to the **SDA** of your Arduino board
 
 <center><img src="images/sdp8xx-pinout.png" width="800px"></center>
 
 2. Open the `exampleUsage` sample project within the Arduino IDE
 
-   	File => Examples => Sensirion I2C SDP => exampleUsage
+   File => Examples => Sensirion I2C SDP => exampleUsage
 
 3. Click the `Upload` button in the Arduino IDE or
 
-   	Sketch => Upload
+   Sketch => Upload
 
 4. When the upload process has finished, open the `Serial Monitor` or `Serial
-   Plotter` via the `Tools` menu to observe the measurement values. Note that
+Plotter` via the `Tools` menu to observe the measurement values. Note that
    the `Baud Rate` in the corresponding window has to be set to `115200 baud`.
 
+# I2C address selection in `exampleUsage`
+
+In the provided `exampleUsage` it is possible to select the I2C address depending on the model of the sensor used.
+When using the wrong address the sensor will not answer the I2C requests, resulting in `NACK` errors.
+Please find the possible values below:
+| constant_name | value |
+|---|---|
+| SDP8XX_I2C_ADDRESS_0 | 0x25 |
+| SDP8XX_I2C_ADDRESS_1 | 0x26 |
+| SDP3X_I2C_ADDRESS_0 | 0x21 |
+| SDP3X_I2C_ADDRESS_1 | 0x22 |
+| SDP3X_I2C_ADDRESS_2 | 0x23 |
+
 # Contributing
 
 **Contributions are welcome!**