Hi,
While below program is uploaded to Arduino Atmel everything works well, have +/-2 measurements from accelerometer. When the same one is uploaded to Lolin wifi esp8266 nodemcu v3 (ESP12-E) the output is very different. Has no negative values and some of the axis jumps sudenly to 255. What is the difference here?
#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
void setup() {
Serial.begin(115200); // 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); // (8dec -> 0000 1000 binary) Bit D3 High for measuring enable
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;
Serial.print("Xa= ");
Serial.print(X_out);
Serial.print(" Ya= ");
Serial.print(Y_out);
Serial.print(" Za= ");
Serial.println(Z_out);
delay(10);
}