EC200U-CNAA Bluetooth

I’m using the ql_ble_gatt_server_demo_init program in EC200U-CN example for the quecopen sdk and the code seems to run perfectly. Just the thing is range is very low(2-5m) for scanning/connectivity. Is there any way i can increase this range. I want to use this module inside a vehicle and such small range is a big issue.

Hi Sir,
This issue may be caused by the low efficiency of the antenna. Could you provide the schematic and PCB pictures of the antenna?