I have a problem with Wire.h.
The ESP hangs at the line:
"Wire.requestFrom(MPU_ADDR, 14, true);"
It only hangs when "Wire.beginTransmission(MPU_ADDR);" previously exists.
What am I doing wrong?
Normally I use an MPU6050 as a library. But with "mpu.initialize();" the program hangs too.
Code: Select all
#include <Wire.h>
const uint8_t MPU_ADDR = 0x68; // I2C address of the MPU-6050
int16_t AcX, AcY, AcZ, Tmp, GyX, GyY, GyZ;
void setup() {
byte error;
Serial.begin(115200);
Wire.begin(); // sda, scl
Wire.beginTransmission(MPU_ADDR);
Wire.write(0x6B); // PWR_MGMT_1 register
Wire.write(0); // set to zero (wakes up the MPU-6050)
error = Wire.endTransmission();
if (error == 0){
Serial.println("I2C device found");
} else if(error != 2){
Serial.println("Error");
}
Serial.println("Setup complete");
}
void loop() {
Wire.beginTransmission(MPU_ADDR);
Wire.write(0x3B); // starting with register 0x3B (ACCEL_XOUT_H)
Wire.endTransmission(true);
Wire.beginTransmission(MPU_ADDR);
Serial.println("StartRequest");
Wire.requestFrom(MPU_ADDR, 14, true); // request a total of 14 registers
Serial.println("ReadAcX");
AcX = Wire.read() << 8 | Wire.read(); // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
Serial.println("ReadAcY");
AcY = Wire.read() << 8 | Wire.read(); // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
AcZ = Wire.read() << 8 | Wire.read(); // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)
Tmp = Wire.read() << 8 | Wire.read(); // 0x41 (TEMP_OUT_H) & 0x42 (TEMP_OUT_L)
GyX = Wire.read() << 8 | Wire.read(); // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
GyY = Wire.read() << 8 | Wire.read(); // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
GyZ = Wire.read() << 8 | Wire.read(); // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)
Serial.print(AcX); Serial.print(" , ");
Serial.print(AcY); Serial.print(" , ");
Serial.print(AcZ); Serial.print(" , ");
Serial.print(GyX); Serial.print(" , ");
Serial.print(GyY); Serial.print(" , ");
Serial.print(GyZ); Serial.print("\n");
}