how to solve meaningless characters on serial montior Arduino - arduino-uno

Question

Hi i am new at Arduino Uno , i am trying to use imu sensor and read datas from it so i installed mpu9500 lib from arduino website and run one example from its lib. However as i open the serial monitor, it displays strange characters . I check the pin configuration many times and load different libs and examples but i could not fix it.
Here is the codes i run.
#include "MPU9250.h"
MPU9250 mpu;
void setup() {
Serial.begin(115200);
Wire.begin();
delay(2000);
if (!mpu.setup(0x68)) { // change to your own address
while (1) {
Serial.println("MPU connection failed. Please check your connection with `connection_check` example.");
delay(5000);
}
}
}
void loop() {
if (mpu.update()) {
static uint32_t prev_ms = millis();
if (millis() > prev_ms + 25) {
print_roll_pitch_yaw();
prev_ms = millis();
}
}
}
void print_roll_pitch_yaw() {
Serial.print("Yaw, Pitch, Roll: ");
Serial.print(mpu.getYaw(), 2);
Serial.print(", ");
Serial.print(mpu.getPitch(), 2);
Serial.print(", ");
Serial.println(mpu.getRoll(), 2);
}
And this is what i get also i changed value of boud but nothing changed
01:10:23.688 -> ⸮7в⸮⸮⸮⸮⸮⸮`f⸮⸮⸮⸮⸮f⸮⸮⸮~⸮⸮xxf⸮~⸮⸮fx⸮⸮⸮⸮⸮⸮怘⸮

Answer 1

Try running simple Serial print code at the same baud rate(115200) and check if your board is alright. Then run the following code once:
#include "MPU9250.h"
MPU9250 mpu; // You can also use MPU9255 as is
void setup() {
Serial.begin(115200);
Wire.begin();
delay(2000);
mpu.setup(0x68); // change to your own address
}
void loop() {
if (mpu.update()) {
Serial.print(mpu.getYaw()); Serial.print(", ");
Serial.print(mpu.getPitch()); Serial.print(", ");
Serial.println(mpu.getRoll());
}
}