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33 lines
842 B
33 lines
842 B
4 years ago
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// Wire Slave Sender
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// by devyte
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// based on the example of the same name by Nicholas Zambetti <http://www.zambetti.com>
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// Demonstrates use of the Wire library
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// Sends data as an I2C/TWI slave device
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// Refer to the "Wire Master Reader" example for use with this
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// This example code is in the public domain.
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#include <Wire.h>
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#define SDA_PIN 4
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#define SCL_PIN 5
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const int16_t I2C_MASTER = 0x42;
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const int16_t I2C_SLAVE = 0x08;
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void setup() {
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Wire.begin(SDA_PIN, SCL_PIN, I2C_SLAVE); // join i2c bus with address #8
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Wire.onRequest(requestEvent); // register event
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}
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void loop() {
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}
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// function that executes whenever data is requested by master
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// this function is registered as an event, see setup()
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void requestEvent() {
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Wire.write("hello\n"); // respond with message of 6 bytes
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// as expected by master
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}
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