You need a FlySky receiver with iBUS, it is work only with iBUS, so no with SBUS, PPM, PWM, ecc... Connect the iBUS pin to the pin of serial adapter that receive data, for example in arduino uno is ...

//AeroSim USB dongle with Flysky FS-iA6B Receiver. On your FlySky FS-i6 Transmitter, assign Ch5 to the 3 position. //switch on the upper right side of the transmitter. And assign Ch6 to the 2 position ...

For those just starting out in the world of RC, a low cost transmitter like the Flysky FS-i6S can be very compelling. But is buying a cheap transmitter setting yourself up for failure down the line?