I2C Protocol - How to program any I2C device without libraries | Arduino and MPR121

In this tutorial, I'm showing you guys how I2C Protocol and I2C device works and how to program them without using a dedicated library. This tutorial will save you a lot of trouble to NOT constantly use libraries and learn a new set of functions and commands for every I2C device you use.

I hope this will help you guys understand I2C communication at least a little bit better for your projects/prototypes.

MPR121 datasheet:

My MPR121 code program:

Chapters:
0:00 Introduction to Protocol/I2C protocol
3:07 MPR121 datasheet
6:15 Registers and operation requirement
14:10 I2C data transmission structure
25:50 Programming soft reset and configuration register
30:38 Reading from sensor measurement register
33:01 Storing and printing sensor readings

[syahrul]

If you guys have any trouble understanding, or problem with using your I2C device. Join my discord server so we can discuss on it.

[taobaomaicai]

This is exactly what I want to have. Thank you

[FLLFlipclock]

This was very helpful. I was able to actually control an audio chip! Thanks!

[abhinilbose]

Thanks for the video. I am going to use it for shrinking my SHT35 humidity and temperature sensor project to ATtiny85

[denischerezov]

Автор видео мололец. Благодаря этому я смог таки разобратся в управлении с mpr121.

[kingtamil]

Awesome tutorial and especially helpful for those branching out of Adruino's hobby kits. I have one question though, how do you do bit shifting, when the LSB is read before the MSB when you do a Wire.requestFrom?

[rakshankulkarni]

very informative video, thanks a lot. could you do one for SPI protocol without library as well please?