Arduino I2c Serial Communication | Arduino Master Slave Tutorial | Tinkercad

In this tutorial we are going to see about Arduino master slave serial communication. Arduino I2c communication between Arduinos, it can be helpful to set up two (or more!) Arduino boards to share information with each other. Connect pin A5 (the clock, or SCL, pin) and pin A4 (the data, or SDA, pin) on the master Arduino to their counterparts on the slave board. Make sure that both boards share a common ground. In order to enable serial communication, the slave Arduino must be connected to your computer via USB.
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Reference:
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Git hub for code:
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Music credit: "Royalty Free Music from Bensound"

[garyrowlands]

Short, yet well explained and, it works. Thank You :)

[learningpower]

Very interesting....Even more from the fact...that you program the event in the void setup....and even when there is nothing in the void loop() ....the event is properly acknowledged. Excellent demonstration!!!!

[Sun_God_]

what if I added one more slave then what will be the change in master unit program

[enea.crazzolara]

Hey, this video helped me a lot. I just wanted to ask one quick thing. In Master code at "EndTransmission()" do I have to add the number I put in "beginTransmittion(1)" in this case the "1"? And the same thing on Slave code at "Wire.read()" do I put the same number as in "Wire.begin(1)" the "1"? I wanted to ask this because I dont know if when using more slaves and coding "endTransmission()" it would end all transmissions or only the number I put in. Thank you.

[manuelmatus]

why you use digitalRead when you should be using analogRead? You are reading from A0 not from a D pin. No?

[emilielaplante]

What is the maximum distance between the master and slave? I need to separate them 20ft appart and I doubt if that will work. Thank you!

[constantin]

Can data be sent vice versa?
If you can help me with an example please?

[pecilijevelicanstveni]

Hi!
I am trying to connect two Arduino Mega 2560 via SPI (Master - Slave) and it does not work. I used various examples from internet (most of them are Uno to Uno) but nothing. Please, can you make an example:
Mega 2560 Master - > SPI -> Mega 2560 Slave
with the working code and how to do it? I am really in the situation to give up...
(I am using built-in SPI library but I am not sure that it covers other micros except UNO. Is there be problem with SPI pins?).

[diye.]

i wonder how could this be possible using Mblock. I am looking forward to program my robot using 2 arduinos ans mblock.

[rafaeloliveira]

Hi im haviong an issue with the wire library this is my code for some reason the if statements arent working it just does imediatly the Wire.write(0x00); and after Wire.write(0x01); can you help me?
if (buton == 0);{

first PCF
Wire.write(0x00);
Wire.endTransmission();
}
if (buton == 1);{
first PCF
Wire.write(0x01);
Wire.endTransmission();
}

[MOTRETKITO]

i follow your code on thinker cad. but invalid header file .. can you help me

[remim]

Bonjour ;-) BRAVO & MERCI, tutoriel simple et efficace.

[shashankkachouli]

Why is it showing invalid header file after compilation?

[sunilminz]

arduino nano to arduino uno ko led blinking program karen with smartphone

[dnyautechnology]

that is very cool .how can i connect 2 arduino that already have midi code

[t.n.]

After every second sentence, You are saying "okay?" 😮😮 this is Horrible 🤮🤮

[insanfadhilmaulana]

not work, sangat tidak bermanfaat, membuang-buang waktu

[mothnaalzouabi]

I want to help you with something. How can I contact you privately

[AniruddhKommajosyulaeeb]

Why does the code just show an error saying invalid header file?