Error in web site: Arduino - MasterReader

rlivio · February 2, 2020, 6:13pm

About I2C, in the example: Arduino Master Reader/Slave Sender there are two blocks of code: master_reader and slave_receiver, but if the master needs to read from the slave, the slave must send data not receive data.
Livio

pert · February 2, 2020, 7:23pm

The correct code is here:

github.com

arduino/ArduinoCore-avr/blob/master/libraries/Wire/examples/slave_sender/slave_sender.ino

// Wire Slave Sender
// by Nicholas Zambetti <http://www.zambetti.com>

// Demonstrates use of the Wire library
// Sends data as an I2C/TWI slave device
// Refer to the "Wire Master Reader" example for use with this

// Created 29 March 2006

// This example code is in the public domain.


#include <Wire.h>

void setup() {
  Wire.begin(8);                // join I2C bus with address #8
  Wire.onRequest(requestEvent); // register event
}

void loop() {

This file has been truncated. show original

but you need to change this line:

  Wire.begin(8);                // join i2c bus with address #8

to:

  Wire.begin(2);                // join i2c bus with address #2

This error has been reported to Arduino here:

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Error in web site: Arduino - MasterReader

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