If the flight controller cannot recognize the receiver

1. Please refer to the flight controller manual and adjust the parameters to match those of the receiver you are using.
Here is the manual link:
T1 FX-405 FC: https://cdn.shopify.com/s/files/1/0553/6573/0348/files/Heewing_FX-405_Manual_T1_Ranger_VTOL_156a3ff5-d467-4603-b70f-c97134251586.pdf?v=1732091462
T2 FX-405 FC: https://cdn.shopify.com/s/files/1/0553/6573/0348/files/Heewing_FX-405_Manual_T2_Cruza_136bc137-ab51-4c7f-b97b-bfb0f39b17c7.pdf?v=1751515070

2. Check whether your receiver and radio are disconnected. If so, ensure they are stably connected before trying to reconnect the receiver to the flight controller.