Hi, I have two acceleration sensors (ADXL345) connected to Arduino UNO and everything works fine. I am thinking about of buying Arduino Nano so that I could send the acceleration data wirelessly to my laptop (either using wifi or bluetooth, which one should I use?). So I am asking if it is possible to connect these two acceleration sensors to Arduino Nano? Here is my wiring diagram used on Arduino UNO and the code to read the data. It has been few years since I played with these things so any help is appreciated!
code to read acceleration data:
#include<Wire.h>// Wire.h library is used for the I2C communication.
// set I2C addresses for ADXL345 sensors
#define accel_module (0x1d) // SDO-> Vcc
#define accel_module2 (0x53) // SDO-> GND
int output[3];
int output2[3];
byte values[6];
int grange;
int samplingRate;
void setSampligRate(int accelSensor, int samplingRate)
{
Wire.beginTransmission(accelSensor); // Start communicating with the device
Wire.write(0x2C); // Access to Register 0x2C—BW_RATE (Read/Write)
Wire.write(10);
Wire.endTransmission();
switch(samplingRate){
case(1600): // 1600hz setting 0000 1110
Wire.beginTransmission(accelSensor); // Start communicating with the device
Wire.write(0x2C); // Access to Register 0x2C—BW_RATE (Read/Write)
Wire.write(14); //(14dec = 1110 binary)
Wire.endTransmission();
break;
case(800):
Wire.beginTransmission(accelSensor);
Wire.write(0x2C);
Wire.write(13);
Wire.endTransmission();
//Serial.println("set sr 800hz");
break;
case(400): // 400hz setting 0000 1100
Wire.beginTransmission(accelSensor);
Wire.write(0x2C);
Wire.write(12);
Wire.endTransmission();
break;
case(200): // 400hz setting 0000 1011
Wire.beginTransmission(accelSensor);
Wire.write(0x2C);
Wire.write(11);
Wire.endTransmission();
break;
}
}
void setRange(int accelSensor, int grange)
{
Wire.beginTransmission(accelSensor); // Start communicating with the device
Wire.write(0x31); // Access to DATA_FORMAT register - 0x31
Wire.write(0); //reset register
Wire.endTransmission();
switch(grange){
case(2):
// when both D1 and D2 are zeros we have 2g setting
// 0000 0000
break;
case(4):
//4g setting 0000 0001
Wire.beginTransmission(accelSensor); // Start communicating with the device
Wire.write(0x31); // Access to DATA_FORMAT register - 0x31
Wire.write(1); //set D0 to 1: (2dec -> 0000 0001 binary)
Wire.endTransmission();
break;
case(8):
////8g setting 0000 0010
Wire.beginTransmission(accelSensor);
Wire.write(0x31);
Wire.write(2);
Wire.endTransmission();
break;
case(16):
////16g setting 0000 0011
Wire.beginTransmission(accelSensor);
Wire.write(0x31);
Wire.write(3);
Wire.endTransmission();
break;
}
}
void getAccelration(int accelSensor, int out[])
{
int xyzregister = 0x32;//specify the first data register. This address is given in the datasheet.
// === Read acceleromter data === //
Wire.beginTransmission(accelSensor);
Wire.write(xyzregister);// Start with register 0x32
Wire.endTransmission();
Wire.beginTransmission(accelSensor);
Wire.requestFrom(accelSensor, 6);//Read 6 registers total, each axis value is stored in 2 registers
int i = 0;
while(Wire.available())
{
values[i] = Wire.read();//store data from the register
i++;
}
Wire.endTransmission();
out[0] = (((int)values[1]) << 8) | values[0];
out[1] = (((int)values[3])<< 8) | values[2];
out[2] = (((int)values[5]) << 8) | values[4];
}
void turnOnAccelSensor(int accelSensor)
{ Wire.beginTransmission( accelSensor); // Start communicating with the device
Wire.write(0x2D); // Access to power control register - 0x2D
Wire.write(0); //clear register
Wire.endTransmission();
Wire.beginTransmission( accelSensor);
Wire.write(0x2D);
Wire.write(8); // Enable measurement mode by setting Bit D3 High (8dec -> 0000 1000 binary)
Wire.endTransmission();
}
char data [23];//acceleration data is transmitted as a string
void loop()
{
// // read acceleration data
getAccelration(accel_module, output); // ********accel 0x1D*********//
getAccelration(accel_module2, output2); // ********accel 0x1D*********//
sprintf(data,"%d %d %d %d %d %d %d",output[0], output[1], output[2], output2[0], output2[1], output2[2]);
Serial.println(data);
}