The custom board problem

[zester926]

Hi Devzone!

I'm using nrf52840 custom board to launch iot service.

We have two type of devices. One is master and the other one is slave.

For now, both of them use 3 anlaog sensors, 1 accelerometer.

And additionally, master has LTE modem and doing the fft work using fpu_fft.

Also, the multilink is established between master and slave.

By the way, when I test our custom board, slave is working perfectly, but, master isn't.

It can't get the device id of accelerometer and it gets analog sensor value strangely. Plus, the analog sensor's power led isn't blinking.

but master is working on DK board. Only at custom board, especially master code is not working.

I don't know why it happens. Maybe the fpu problem?

Is fpu located in the CPU of nRF52840?

Because we only used CPU side to our custom board.

Thank you for your help.

Best regards,

Baek

[Jared]

Hi,

Could you provide the schematics of the custom board ( I can make the case private if you prefer it)? Are you observing this on all masters samples or only one?  

but master is working on DK board. Only at custom board, especially master code is not working.

 Are you using the same code for both? Could you share the code?

regards

Jared

[zester926]

Hi Jared!

Sorry, It was my fault.

We added power enable pin so if we wanna use sensors, we should set high at that pin.

but, I forgot to set this pin to high.

When I enable this pin high every problem is solved.

Thank you again and sorry for taking your time.