Chat here about code rewrites, mods, etc... with respect to the github project https://github.com/esp8266/Arduino

Moderator: igrr

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By Eddiie
#74013 I have a Heltec ESP32 Wifi board. (sorry if this is the wrong forum)

When compiling sample code with wire.h defined, I get an error on ESP32 boards but not ESP8266:

// 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

Code: Select all// 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() {
  delay(100);
}

// function that executes whenever data is requested by master
// this function is registered as an event, see setup()
void requestEvent() {
  Wire.write("hello "); // respond with message of 6 bytes
  // as expected by master
}


C:\Users\Me\Documents\Arduino\I2C_Slave\I2C_Slave.ino: In function 'void setup()':

I2C_Slave:17: error: 'class TwoWire' has no member named 'onRequest'

Wire.onRequest(requestEvent); // register event

^

exit status 1
'class TwoWire' has no member named 'onRequest'

Any fix for this?