I2C Read Issue

[MichiTheSailor]

Ciao,

First o fall many thanks for your good work - Make handling of MPU6050 really easy ;o)

After Updating to new version of ESP32-HAL-I2C I realized that READ from MPU6050 did not work any more. (got only NULL values)
After research and comparision with different other includes like I2C-EEPROM, I2C-Display, etc. I realized that your access seems wrong designed and worked until now only by accident.

Real Bugfix is the wrong parameter in "endTransmission", further I added e rought "error detection/handling".

Simple Bugfix in MPU6050_tockn.cpp:
Change Line 71 in MPU6050::calcGyroOffsets from:
wire->endTransmission(false)
to:
byte rxStatus = wire->endTransmission(true);
if (rxStatus != 0) Serial.println("MPU6050::update EC: " + String(rxStatus));

Same Bugfix in MPU6050_tockn.cpp:
Change Line 105 in MPU6050::update from:
wire->endTransmission(false)
to:
byte rxStatus = wire->endTransmission(true);
if (rxStatus != 0) Serial.println("MPU6050::update EC: " + String(rxStatus));

Afterwards it worked really fine.... :o)

Kind regards
Michi

[cedricwritescode]

This fix worked also fine for me on my ESP32 DOIT Devkit V1.
The Serial.print didn't worked for me. Without it it works.

[geoInno]

Works well, but my GY-521 board is powered with 5V and gives an output of 3.6 V on SDA/SLA. This is not working with my ESP32 devkit board, even though I2C scan shows the address of the module. Quick solution is to add a 10K resistor between each line (SDA/SDL) and GROUND. Have fun. Damian

[agunes77]

thank you Damian

[netpipe]

https://github.com/netpipe/HappyHands/tree/main/gyroArduino/MPU6050_tockn-swire