Dear forum members. Please help me. I googled a lot, and here my last opportunity.
At my arduino due there are 3 rx/tx group of pins for serial communication. When I'm using Serial read and write in IDE, I have no issue with sending data through the cable connected to usb programmable port.
But when trying to send data to raspberry connected with it's rx to arduino tx and vice versa, of cause having common ground, I cannot read anything from raspberry.
In my mouse sensor project http://forum.arduino.cc/index.php?topic=284799.0 I finished with i2c communication between arduino and rpi.
I'm curious, how to send/read data from rx1/tx1 rx2/tx2. Different pins should be differentiated somehow in the code.
I'm newbie with all this stuff, but have grand plans in mind. So sorry for stupid question.