This project is configured for low power operation. When the UART on the nRF51 is constantly enabled, it will consume a lot of current, ~1mA constantly. The trick is to only enable the UART when data ...
#define ECHO_TEST_TXD (CONFIG_EXAMPLE_UART_TXD) // UART TX pin #define ECHO_TEST_RXD (CONFIG_EXAMPLE_UART_RXD) // UART RX pin #define ECHO_TEST_RTS (UART_PIN_NO ...