README File

README.md

@@ -76,4 +76,26 @@ Now, in the Arduino IDE go to **Tools > Board > Boards Manager**.
 In the search bar of the Boards Manager, lookup **esp32**.
 Update to the most recent version if you do not already have it.
 
+## ThingSpeak library for Arduino
+Now, you have to use the next link to download the ThingSpeak library, which lets us sending data to this platform: 
+
+_https://www.arduinolibraries.info/libraries/thing-speak_
+
+It is important you **do not unzip** the downloaded file.
+
+You will have to import this _.zip_ file to the Arduino IDE. To import the file, in the IDE go to:
+**Sketch > Include Library > Add .ZIP Library**
+
+![ThingSpeak ZIP](11.png)
+
+And pick the corresponding file you just downloaded.
+
+## EZO I2C Library
+Use the next link to download the modules for I2C communication between the devices of the board:
+https://github.com/Atlas-Scientific/Ezo_I2c_lib
+
+![EZO ZIP](12.png)
+
+Again, it is important you **do not unzip** the downloaded file. One more time, you have to import this file 
+to the Arduino IDE by following the same instructions: **Sketch > Include Library > Add .ZIP Library**