MMA8452Q not connecting, getting stuck at "accel.begin()"

Sensors IMU & Motion
1

Hello,

I bought a MMA8452Q and have connected it according to the hookup guide (https://learn.sparkfun.com/tutorials/mm … okup-guide)

I’m using an Arduino Leonardo, so the SDA and SDL of the accelerometer are hooked up to the SDA and SDL of the Leonardo with a 330 ohm resistor between. The GND is hooked up to ground and 3.3V to the 3.3V pin on the Arduino.

I’m using this example code: https://github.com/sparkfun/SparkFun_MM … tation.ino

The library is added correctly and the code compiles.

However, the accelerometer gets stuck at the “accel.begin()” step, on line 41.

2

Hi cjohnson57,

Are you getting this error “Not Connected. Please check connections and read the hookup guide.” when you open a serial monitor? If that’s the case, it might be a connection issue. Can you take a few photos of your circuit and attach them to your response?

3

Hello,

Sorry for the late reply, I was very busy.

It turns out the issue was that the SCL and SDA ports on the Arduino Leonardo were not the pins labeled SCL and SDA, but rather pins 3 and 2, respectively.

4

Not a problem, I am glad to hear it was just a simple connection/pin issue that you were able to figure out.

Happy hacking!