UART for BLE Mesh Model

[Venkat RAM]

Hi Team,

I am working on NRF52832 based on the BLE mesh protocol

here I am using the Light_switch example of SDK - nrf5sdkformeshv500src

Here I need to send the message data that received by Light_switch - Server, to UART.
for that I am not sure but  used to take some funtions like  uart_init() and nus_data_handler from ble_app_uart_coexist example

Here my probllem is

1. what are the funtion need to intergrate from ble_app_uart_coexist example?

uint32_t err_code;
ble_nus_init_t nus_init;

err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init);
APP_ERROR_CHECK(err_code);

// Initialize NUS.
memset(&nus_init, 0, sizeof(nus_init));

nus_init.data_handler = nus_data_handler;

2. where i want to pass the nus_init.data_handler because in ble_app_uart_coexist  example they passed to ble_nus_init

err_code = ble_nus_init(&m_nus, &nus_init);
APP_ERROR_CHECK(err_code);

In my case where i want to pass the &m_nus, &nus_init

3. How to pass the received data to UART?

Thanks in Advance

Best Regards,

Venkatraaman J S.

[Venkat RAM]

firstly I am trying to send a custom data to uart like

int main(void)
{

initialize();
start();
uart_init();
uint32_t err_code;

do
{
err_code = app_uart_put('p');
if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_BUSY))
{
__LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "----- UART initiated successfully -----\n");

//NRF_LOG_ERROR("Failed receiving NUS message. Error 0x%x. ", err_code);
APP_ERROR_CHECK(err_code);
}
} while (err_code == NRF_ERROR_BUSY);

in nrf_mesh light_switch example

But i cant able to see any data in my terminal ( I am using tera term with 115200 baud rate)

kindly help me

Best regards

venkatraaman

[Kenneth]

Have you tried to connect a logic analyser to look at the UART pins?

Kenneth

[Venkat RAM]

Hai Kenneth,

static void uart_init(void)
{

__LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "----- UART ----------------------------\n");

uint32_t err_code;
app_uart_comm_params_t const comm_params =
{
.rx_pin_no = RX_PIN_NUMBER,
.tx_pin_no = TX_PIN_NUMBER,
false,
false,
//.rts_pin_no = RTS_PIN_NUMBER,
//.cts_pin_no = CTS_PIN_NUMBER,
.flow_control = UART_HWFC ,
.use_parity = false,
#if defined (UART_PRESENT)
.baud_rate = NRF_UART_BAUDRATE_115200
#else
.baud_rate = NRF_UARTE_BAUDRATE_115200
#endif
};

APP_UART_FIFO_INIT(&comm_params,
UART_RX_BUFF_SIZE,
UART_TX_BUFF_SIZE,
NULL,//uart_event_handle_custom,
APP_IRQ_PRIORITY_LOWEST,
err_code);
APP_ERROR_CHECK(err_code);
__LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "----- UART initiated successfully -----\n");
}

int main(void)
{
uart_init();
//uint32_t err_code;
app_uart_put('p');

}

My code executing successfully
and while seeing the TTL LOgic Circuit terminal the data was not displaying

Best Regards
venkatraaman

[Kenneth]

You have connected ground also? Is the voltage level on RXD and TXD within the same level (<0.3V difference)?

Kenneth

[Venkat RAM]

No, I have not connected the GND pin of the Nrf board to the GND pin of the TTL logic circuit board
Should I need to connect?

Venkatraaman J S

[Kenneth]

Yes, ground must always be connected between boards, it's used as "reference level" for all digital pins.

Kenneth