arduino 與 nodemcu 透過i2c溝通

程式碼

---

	#include <Wire.h>
	const byte SLAVE_ADDRESS = 0x15;
	void setup() {
	Wire.begin(0x15); // join i2c bus with address #8
	Wire.onReceive(receiveEvent); // register event
	Serial.begin(9600); // start serial for output
	}
	void loop() {
	delay(100);
	}
	// function that executes whenever data is received from master
	// this function is registered as an event, see setup()
	void receiveEvent(int howMany) {
	while (1 < Wire.available()) { // loop through all but the last
	char c = Wire.read(); // receive byte as a character
	Serial.print(c); // print the character
	}
	int x = Wire.read(); // receive byte as an integer
	Serial.println(x); // print the integer
	}

view raw arduino_i2c.ino hosted with ❤ by GitHub

	id=0
	sda=1
	scl=2
	ARDUINO_I2C = 0x15
	tmp=0
	i2c.setup(id,sda,scl,i2c.SLOW)
	print("I2C demo")
	while 1 do
	i2c.start(id)
	i2c.address(id, 0x15,i2c.TRANSMITTER)
	i2c.write(id,tmp)
	i2c.stop(id)
	print("write",tmp)
	tmr.delay(1000000)
	if tmp ==34 then
	tmp=0
	else
	tmp=tmp+1
	end
	end

view raw nodemcu_i2c.lua hosted with ❤ by GitHub