Dht22 doesnt work on custom atmega329 pcb

[zitsw]

hi, I did my project on custom PCb with atmega 328p, it have sd module and clock, everything works perfect exept dht22, its keep saying NAN, i was trying to connect it separetly from pcb to another arduino it works perfectly. What can be cause of it?
At the bottom i attach photo of PCB

[lastchancename]

nan is most likely a software issue if you’ve previously had it working…
Please use code tags to help us help you.

[red_car]

@zitsw

What can be cause of it?

Can you post the schematic?

Did you test the circuit first on a bread board?

[zitsw]

Here is a schematic for PCB. Yes i test everything on bread board with differnet modules.

[zitsw]

I also tried to remove 10K resistor because when i checked the resistance between VCC and dDht its gives 5Kom, when i remove it i got 10Kom

[red_car]

@zitsw

I also tried to remove 10K resistor

You will need that pull-up resistor.

So if you connect the sensor to another Arduino (UNO ?) running the same code it works?

Can you also show the PCB layout.

[zitsw]

@red_car

So if you connect the sensor to another Arduino (UNO ?) running the same code it works?

Yes