Try swapping the rx/tx lines, verify you are using the correct baudrate, and make sure the console is disabled on the AMA0 serial interface (via raspi-config). If these things are correct, it should work.
Dear DS Wang
I am struggling with the same problem as yours more than two months I am using RPi3 and Pixhawk could you tell me the way you did it yours , once I run the command of testing i got those number ,I am in china
The communicatory question between pixhawk and raspberry pi3
Try to choose a different baudrate (38400, 57600, 115200), or confirm the baudrate of the serial port by looking at the SERIAL* parameters with qgroundcontrol
thanks for your quick response I was tried to change for different baundrate but I did not expected result only for 38400 i got the one you on the picture , could you tell me what i suppose to do ?
Please post about your single problem, in a single forum topic. It is confusing and difficult to help you otherwise.
Thanks , actually i didn’t recognized i posted in the same forum , my issues make me to ask anywhere I found a post which is similar as mine that’s why. sorry for that but till now I am still need your help to fix my problem
This is all the advice that I have. Try using it with your desktop and a terminal or QGC, you should be able to connect to QGC over the TELEM1 port.
Hello sir ,I was tried all your advice you gave me but no one worked for me but i still try to find out how I can handle it till now , I was reading somewhere the way the handle it as you will see in the below picture but I am understand clearly ,could you help me to understand it .