MPU-6000(SPI) with Arduino Uno - why blank in serial monitor ?

Projects General Guidance
1

Hi everyone ,

I am newbie here and not very pro so pls do forgive me if I have made any mistake.
Apparently, I am doing my project that serves for gait analysis by using MPU-6000 ,SPI connection with arduino uno . Project will continue switch to Pro mini after this.

Pin assignment :
SCL : Arduino Digital pin 13
SDA : Arduino Digital pin 11
SDO : Arduino Digital pin 12
/CS : Arduino Digital pin 7
My MPU-6000 pcb as below ,

Problem :
I have three MPU-6000 pcb in my hand and I need to test all of these , to make sure it is working before combining them together.

I got my sensor work and it shows raw data from serial monitor accordingly for first sensor.
However, the serial monitor is showing completely blank for another sensor . Arduino uno is showing it is transmitting data , so I suspect that the problem is not lies at Uno.

I tried to press the reset button but it is still running and showing blank at serial monitor.
I was wondering how can it be working perfectly for my first sensor but it can’t get the same result for my second sensor.

Anyone knows how to fix this? Any suggestion is welcome.

Thanks in advance!

2

It could be a hardware or software fault or a combination, but since you haven't shown us the hardware or software we've no way of guessing.

The most obvious reason that you aren't receiving any serial output at the PC is that you aren't sending it from the Arduino. Does your sketch initialise the serial port and send a message to it at startup? Do you see that message in the monitor? Do the serial port settings in the Arduino IDE serial monitor match the settings used in your sketch? If in doubt, disconnect all external hardware from the Arduino and run a sketch that does nothing but send a message to the serial port, and confirm that works. Then you can reinstate your original sketch and see if that also works, and then reinstate the hardware and see at what point it stops working.

3

Thanks for ur suggestion. I will definitively try it out :slight_smile: