ESP8266 Community Forum

- Sat Sep 26, 2020 11:18 am #88909 hi, i been trying passing orientation data from adlx345 to esp8266 and it gives bad information, i can pass data from acelaration, but my code to pass orientation data won't work propertly. i will pass the code down here.

Scl ---D1
Sda---D2
Gnd--gnd
3v3---3v3

#include <Wire.h> // Wire library - used for I2C communication
int ADXL345 = 0x53; // The ADXL345 sensor I2C address
float X_out, Y_out, Z_out; // Outputs
float roll,pitch,rollF,pitchF=0;
void setup() {
//ESP8266 MASTER
Serial.begin(9600); // Initiate serial communication for printing the results on the Serial monitor
Wire.begin(); // Initiate the Wire library
// Set ADXL345 in measuring mode
Wire.beginTransmission(ADXL345); // Start communicating with the device
Wire.write(0x2D); // Access/ talk to POWER_CTL Register - 0x2D
// Enable measurement
Wire.write(8); // Bit D3 High for measuring enable (8dec -> 0000 1000 binary)
Wire.endTransmission();
delay(10);
//Off-set Calibration
//X-axis
Wire.beginTransmission(ADXL345);
Wire.write(0x1E);
Wire.write(1);
Wire.endTransmission();
delay(10);
//Y-axis
Wire.beginTransmission(ADXL345);
Wire.write(0x1F);
Wire.write(-2);
Wire.endTransmission();
delay(10);
//Z-axis
Wire.beginTransmission(ADXL345);
Wire.write(0x20);
Wire.write(-9);
Wire.endTransmission();
delay(10);
}
void loop() {
// === Read acceleromter data === //
Wire.beginTransmission(ADXL345);
Wire.write(0x32); // Start with register 0x32 (ACCEL_XOUT_H)
Wire.endTransmission(false);
Wire.requestFrom(ADXL345, 6, true); // Read 6 registers total, each axis value is stored in 2 registers
X_out = ( Wire.read() | Wire.read() << 8); // X-axis value
X_out = X_out / 256; //For a range of +-2g, we need to divide the raw values by 256, according to the datasheet
Y_out = ( Wire.read() | Wire.read() << 8); // Y-axis value
Y_out = Y_out / 256;
Z_out = ( Wire.read() | Wire.read() << 8); // Z-axis value
Z_out = Z_out / 256;
// Calculate Roll and Pitch (rotation around X-axis, rotation around Y-axis)
roll = atan(Y_out / sqrt(pow(X_out, 2) + pow(Z_out, 2))) * 180 / PI;
pitch = atan(-1 * X_out / sqrt(pow(Y_out, 2) + pow(Z_out, 2))) * 180 / PI;
// Low-pass filter
rollF = 0.94 * rollF + 0.06 * roll;
pitchF = 0.94 * pitchF + 0.06 * pitch;
Serial.print(" X= ");
Serial.print(rollF);
Serial.print("/");
Serial.print(" Y= ");
Serial.print(pitchF);//ln na ultima linha
Serial.print("/");
Serial.print(" Z= ");
Serial.println(Z_out);
}




the output is like

x:89.50 y=-0.01 z=0.83



code only show acelaration (works)

#include <Wire.h>
#include <Adafruit_Sensor.h> // Adafruit sensor library
#include <Adafruit_ADXL345_U.h> // ADXL345 library

Adafruit_ADXL345_Unified accel = Adafruit_ADXL345_Unified(); // ADXL345 Object

void setup() {

Serial.begin(9600);
if(!accel.begin()) // if ASXL345 sensor not found
{
Serial.println("ADXL345 not detected");
while(1);
}

}

void loop() {

sensors_event_t event;
accel.getEvent(&event);
Serial.print("X: ");
Serial.print(event.acceleration.x);
Serial.print(" ");
Serial.print("Y: ");
Serial.print(event.acceleration.y);
Serial.print(" ");
Serial.print("Z: ");
Serial.print(event.acceleration.z);
Serial.print(" ");
Serial.println("m/s^2 ");
delay(500);

}

- Sat Sep 26, 2020 12:45 pm #88912 That's not a hardware question, it's an Arduino question. Please move it to the relevant section of the forum.