Hi xeonus, I just registered to this forum to help you out, haha 😋 Considering that you´re surprised that the result of Serial.println(0x41); is 65, shows me that you´re a newbie as I am 😄 0x41 is a hexadecimal number value, which converted to a decimal value is 65. For better understanding: Click here for hexadecimal table Serial.printIn is also no command to read any registers from BNO0555 sensor. In easy words this command says "Send the thing, which is in the brackets, via serial port to your serial monitor console." So by writing Serial.println(0x41);, you´re basically saying Serial.println(65);, which means: "Display the value 65 in the serial monitor" There is btw also a difference between Serial.print and Serial.println, so google it, if you want to know the difference 😛 I assume that you´re using some type of Arduino board and a BNO055 Breakout Board? If yes, then just download and copy this library to your Arduino-libraries-folder: https://github.com/arduino-libraries/BNO055 Then open up in Arduino IDE the "Basic.ino" example and replace the void setup with this: void setup() //This code is executed once { //Initialize I2C communication Wire.begin(); //Initialization of the BNO055 BNO_Init(&myBNO); //Assigning the structure to hold information about the device //Configuration to Config mode bno055_set_operation_mode(OPERATION_MODE_CONFIG); delay(1); bno055_set_axis_remap_value(REMAP_X_Y); delay(1); bno055_set_x_remap_sign(0x01); delay(1); bno055_set_y_remap_sign(0x01); delay(1); bno055_set_z_remap_sign(0x01); } In the file BNO055.h in line 521 you can see that REMAP_X_Y stands for 0X21. In the file BNO055.c you can look up how the talented boys and girls from Bosch wrote the functions bno055_set_operation_mode, bno055_set_axis_remap_value, bno055_set_x_remap_sign, ... . I´m not 100% sure, if my suggested commands for the remap_sign are correct, but reading the BNO055.c, I think it could work. 😄 I guess the moderator didn´t answered all of your questions, because you´re asking for really basic stuff ^^ Hopefully I could help you in some way and it´ll work... 😛 Best regards
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