I have an android smartphone of bluetooth version 4 and i am developing one application where i am using nRF52 (bluetooth version 5). Is it possible to write data from the custom app by using mobile's bluetooth to the nRF52 device? I am using the custom uuid to write data from the custom app to the bluetooth module but after connecting GATT service i cannot write data to the nRF52 bluetooth module. Please help me in this.