I have an OPT101 connected to a slave arduino to measure light intensity. I want to send the data received from the OPT101 circuit to a master arduino that will print the data on the serial monitor. When I test my code, nothing shows up on the screen. (I know it's not my i2c connection cause I tested it by sending "hello"). I am using an arduino leonardo as the slave and the arduino uno as the master.
The code for the OPT101 circuit is:
#define inPin0 0
void setup() {
Serial.begin(9600);
Serial.println();
}
void loop() {
int pinRead0 = analogRead(inPin0);
double pVolt0 = pinRead0 / 1024.00 * 5.0;
Serial.print(pVolt0, 4 );
Serial.println();
delay(100);
}
I tired to combine the slave code and my OPT101 code to get this: #include
#define inPin0 0
void setup() {
Wire.begin(2);
}
void loop() {
Wire.beginTransmission(2);
Wire.onRequest(requestEvent);
Wire.endTransmission();
}
void requestEvent()
{
int pinRead0 = analogRead(inPin0);
int pVolt0 = pinRead0 / 1024.0 * 5.0;
Wire.write((byte)pVolt0);
}
And this is my master code:
#include <Wire.h>
void setup()
{
Wire.begin();
Serial.begin(14400);
Wire.requestFrom(2, 8);
while(Wire.available())
{
char c = Wire.read();
Serial.print(c);
}
}
void loop()
{
}
Can somebody please help me. Thank you!
