BLE_NUS_MAX_DATA_LEN

#define BLE_NUS_MAX_DATA_LEN   BLE_NUS_MAX_DATA_LEN_CALC(CONFIG_NRF_SDH_BLE_GATT_MAX_MTU_SIZE)

#include <ble_nus.h>

Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module.