So now it works fine but i would like to know if it is possible to kill those background 'pwm test' process. The 'kill -9 340' (where 340 is my pid value from a call to 'ps') does not seems to work.
Is is possible to bring a background process to foreground ? or to simply kill it ?
Because now I need to restart the Pixhawk every time to try another set of pwm values...