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The document available at developers.google.com...OAuth2ForDevices explains how to access the Google APIs (limited to the scopes listed here developers.google.com...#allowedscopes) through OAuth 2.0 authentication with low computational power devices. Based on this, the Arduino sketch downloadable from bit.ly/38KFvj8 was written for development boards based on the ESP32 SoC (for more information refer to en.wikipedia.org/wiki/ESP32 and github.com/espressif/arduino-esp32).
The document available at developers.google.com...OAuth2ForDevices explains how to access the Google APIs (limited to the scopes listed here developers.google.com...#allowedscopes) through OAuth 2.0 authentication with low computational power devices. Based on this, the Arduino sketch downloadable from bit.ly/38KFvj8 was written for development boards based on the ESP32 SoC (for more information refer to en.wikipedia.org/wiki/ESP32 and github.com/espressif/arduino-esp32).
Before using the sketch, it's necessary to add the informations indicated in the following two figures.
Before using the sketch, it's necessary to add the informations indicated in the following two figures.
In the "sketch.ino" file you must enter the credentials of your WiFi network.
In the "sketch.ino" file you must enter the credentials of your WiFi network.
In the "configurations.h" file it is necessary to insert the values obtainable following the first part of the Google guide developers.google.com...#prerequisites and the desired scopes (see developers.google.com...#step-1:-request-device-and-user-codes and developers.google.com...#allowedscopes).
In the "configurations.h" file it is necessary to insert the values obtainable following the first part of the Google guide developers.google.com...#prerequisites and the desired scopes (see developers.google.com...#step-1:-request-device-and-user-codes and developers.google.com...#allowedscopes).
The sketch supports oled displays as the one shown on the page startingelectronics.org/tutorials...n5qQgRisBcSrohFCA, with the only difference working on 3.3 V; it must connected to the development board as follows.
The sketch supports oled displays as the one shown on the page startingelectronics.org/tutorials...n5qQgRisBcSrohFCA, with the only difference working on 3.3 V; it must connected to the development board as follows.
The following images show how the sketch works.
The following images show how the sketch works.
1) The bord connects to the Internet via WiFi.
1) The bord connects to the Internet via WiFi.
2) From a device connected to the Internet (e.g. PC, smartphone, ...) it's necessary to open the link www.google.com/device and enter the code shown on the display.
2) From a device connected to the Internet (e.g. PC, smartphone, ...) it's necessary to open the link www.google.com/device and enter the code shown on the display.
4) To authorize access, click on Allow.
4) To authorize access, click on Allow.
5) Signed in.
5) Signed in.
6) The board shows the successful login.
6) The board shows the successful login.
7) If the bord is reset it reconnects to the Internet.
7) If the bord is reset it reconnects to the Internet.
8) The card tries to authenticate by updating the access token.
8) The card tries to authenticate by updating the access token.
9) The board shows successful login.
9) The board shows successful login.
10) After 5 seconds the logout is performed. Resetting the card, it will restart from point 1.
10) After 5 seconds the logout is performed. Resetting the card, it will restart from point 1.
Notes:
Notes:
1) the project doesn't implement all the modern security systems for the protection of data exchanged over the Internet, so it's better to avoid inserting sensitive data in the information exchanged by the development board on the Internet;
1) the project doesn't implement all the modern security systems for the protection of data exchanged over the Internet, so it's better to avoid inserting sensitive data in the information exchanged by the development board on the Internet;
2) the sketch isn't accompanied by a complete documentation;
2) the sketch isn't accompanied by a complete documentation;
3) my programming skills are not very high and aim to improve them over time; therefore pay attention, because you could find programming errors and wrong algorithms in the source code;
3) my programming skills are not very high and aim to improve them over time; therefore pay attention, because you could find programming errors and wrong algorithms in the source code;
4) the software is provided "as is", without warranty of any kind; I take no responsibility for the consequences deriving from the use of the information contained on this page.
4) the software is provided "as is", without warranty of any kind; I take no responsibility for the consequences deriving from the use of the information contained on this page.
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