Hello, I am trying to create a serial communication between Arduino and Processing for the MPU6050 acceleration sensor. When I run the code in Processing and my UI shows up, I see that the MPU6050 is collecting data even though I haven't even moved it yet and continues to collect it to a point where it cannot collect data anymore. I believe the problem is in the sensitivity of the sensor: I have tried to modify it in the mapping function, however I'm not sure this is the way to go about it. Does anybody know how to solve the issue? Below is the code I used:
#include "MPU6050.h"
int sampleRate = 1000; //samples per second
int sampleInterval = 1000000/sampleRate; //Inverse of SampleRate
long timer = micros(); //timer
MPU6050 imu;
int16_t ax, ay, az;//Defining the RGB LED pins
const int redPin = 5;
const int greenPin = 6;
const int bluePin = 9;
//int ledOn = 0; //to control the LED.
int dF = 30;
void setup()
{
Serial.begin(115200);
Wire.begin();
// pinMode(LED_BUILTIN,OUTPUT);
//Setting the RGB LED pins as outputs
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
//Turn off the RGB LED by default
digitalWrite(redPin, LOW);
digitalWrite(greenPin, LOW);
digitalWrite(bluePin, LOW);
if (!imu.begin(AFS_2G, GFS_250DPS)) {
Serial.println("MPU6050 is online...");
}
else {
Serial.println("Failed to init MPU6050");
while (true)
;
}
timer = micros();
}
void setColor(int redPin, int greenPin, int bluePin, int redValue, int greenValue, int blueValue) {
analogWrite(redPin, redValue);
analogWrite(greenPin, greenValue);
analogWrite(bluePin, blueValue);
}
void loop()
{
if (micros() - timer >= sampleInterval) { //Timer: send sensor data in every 10ms
timer = micros();
getDataFromProcessing(); //Receive before sending out the signals
Serial.flush(); //Flush the serial buffer
if (imu.getAcc3Counts(&ax, &ay, &az)) {
sendDataToProcessing('A', map(ax, -32768/dF, 32767/dF, 100, 400));
sendDataToProcessing('B', map(ay, -32768/dF, 32767/dF, 100, 400));
sendDataToProcessing('C', map(az, -32768/dF, 32767/dF, 100, 400));
//sendDataToProcessing('D', map(analogRead(A0), 0, 1023, 100, 500));
}
}
analogWrite(redPin, 0);
analogWrite(greenPin, 0);
analogWrite(bluePin, 0);
delay(1000);
}
void sendDataToProcessing(char symbol, int data) {
Serial.print(symbol); // symbol prefix of data type
Serial.println(data); // the integer data with a carriage return
}
void getDataFromProcessing() {
while (Serial.available()) {
char inChar = (char)Serial.read();
if (inChar == 'a') { //when an 'a' charactor is received.
//ledOn = 1;
//digitalWrite(LED_BUILTIN, ledOn); //turn on the built in LED on Arduino Uno
setColor(5,6,9,0,255,0);
}
if (inChar == 'b') { //when an 'b' charactor is received.
//ledOn = 0;
//digitalWrite(LED_BUILTIN, 0); //turn on the built in LED on Arduino Uno
setColor(5,6,9,255,0,0);
}
if (inChar == 'c') { //when an 'b' charactor is received.
//ledOn = 0;
//digitalWrite(LED_BUILTIN, 0); //turn on the built in LED on Arduino Uno
setColor(5,6,9,0,0,255);
}
}
}