How to change the Receive buffer size in BLE_APP_UART

[kunal]

After programming the Ble_app_uart to the nrf52832, I am sending a 100 Bytes of data from my UART Port to Nordic chip and this data is transferred over BLE to my Phone. I am using Nrf data CONNECT on my phone to read the incomiing and outgoing data. All is working well. I saw that when i send 100 Bytes of data from UART to nrf52832, the nrfCONNECT displays only 61bytes of received data. Actually i want to Control the Rx Buffer size so that it receives only 20 Bytes of data from UART atone instance. Please tell me which variable needs to be changed to 20 because changing the UART_RX_BUF_SIZE (256) in th Code does not make any difference.

[Hung Bui]

Do you have hardware flow control on UART ?

Could you check if APP_UART_DATA_READY is called for every single character you send to UART ? You can comment out BLE sending code and simply store what it receives in that event to an array to check .