The HMC5883L output just one fixed value, no matter how to move the board. the value vary every time power on, why? #include <Wire.h> #include <Adafruit_Sensor.h> #include <Adafruit_HMC5883_U.h> Adafruit_HMC5883_Unified mag = Adafruit_HMC5883_Unified(12345); void setup(void) { Serial.begin(9600…

mag.begin is missing. See the example: https://github.com/adafruit/Adafruit_HMC5883_Unified/blob/master/examples/magsensor/magsensor.ino

Why this HMC5883L just output fixed number?

shanren August 31, 2021, 11:53pm 3

Thanks.
I bought the board from Amazon long ago. the link just shown the same parts, not the same supply.

The board can be output real time number when move it with other sketch.

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