It looks like you need to connect 3 pins (I suggest to use gnd, vdd and analog pin). If you flip the nRF52840-DK upside down, you can find that pin P0.03 is labeled with AIN0 (analog input 0).
Ok thanks, I already tried with this example but I found a problem in reading the value delivered by the sensor, since I had made the necessary connections but the output values does not change. is there any command that I must add to read the value from sensor?
I suggest to get a potensiometer first to just check that the reading works as intended, also get a oscilloscope or logic analyzer where you can measure the analog output from the gaz sensor.
