My Garduino project

Hello everybody.
I have spent a lot of time on this project but there is still something that does not work as expected and tried on the breadboard.
What I would like to achive is to have an arduino Yun that control moistrure, DHT, pressure sensors and relays.
After some tests on the breadboard I ordered a PCB from fritzing fab but when I mount on my arduino the sensor seems not working as expected.
DHT is working fine but moisture give me strange reads and pressure sensor cannot be found by arduino.
Can someone help me to understand what is going on?