Getting the sensor value in mission planner software

I have arduino uno and some gas sensor and temperature sensor. I will acquire the sensor value through arduino uno, and want to write those values to pixhawk orange cube through UART port.
Now my requirement is, i want to see those values in mission planner software at ground station.
Tell me the procedure to do this.

Thanks in advance.

If you have sent the data through mavlink messages correctly, they should be showing up in mavlink inspector in Mission Planner