I'd opened the "Day020_BLE_UART". I'd used CY8C4247LQI-BL483 as central and CYBLE-012011 as peripheral. They connect succesfully as I see in Teraterm. The problem is that I can send data from peripheral to central, but not viceversa.
Please check the TX and RX pin connections in Central project. UART_TX pin should be connected to P1.5 and UART_RX pin should be connected to P1.4.
Please share your project if you are still facing any issue.