When using the E6 transmitter (e.g. radio controller from a TinyHawk RTF bundle), you may encounter issues with binding/arming/controlling a BNF drone. To resolve these issues, you will need to follow the steps below to make certain changes in Betaflight. *
This is because the E6 transmitter uses the traditional FrSky channel mapping order of AETR (aileron/elevator/throttle/rudder). On the other hand, the BNF drones come set up for later FrSky transmitters which commonly have a channel mapping order of TAER (throttle/aileron/elevator/rudder). Also, the E6 Transmitter only has two Aux switches, with Aux1 on the right side and Aux2 on the left side.
* If you have and older E6 transmitter, a custom Betaflight hex/firmware is required for drones with SPI-based receivers (i.e. TinyHawk S/Freestyle/II). Otherwise, you will not be able to bind. If you encounter this binding issue, please see the specific instructions for each respective drone.