how to do simple data transfer using bluetooth serail terminal?
how to do simple data transfer using bluetooth serail terminal?
Hello,
You could use the BLE NUS peripheral and central examples to do such a transfer between your devices.
The examples will relay anything they receive over UART to their connected peer over BLE, and the peer will output the messages received over BLE out on its UART, and visa versa.
Test this according to the example documentation, and let me know if you encounter any issues or questions.
Best regards,
Karl
i go through the nsu code but which api was used to transfer the data?
venkatesha kj said:i am using serial bluetooth terminal to send the data.
Which application is this? Please be specific.
Did you follow the instructions in the example's documentation when you tested the NUS example? Which step of the documentation did not succeed, and how did it behave different from what was expected?
Best regards,
Karl
nrf uart was not supported for android 10, so can u please send me the app link for uart communication
The NRF UART smartphone application is indeed deprecated.
You can use the nRF Connect application to connect to and communicate with your device running the BLE NUS application.
Best regards,
Karl
static uint8_t data_array[BLE_NUS_MAX_DATA_LEN] = {1234};
uint8_t length = 10;
ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
i am not used uart to send the data but just these lines i have used to send the data over bluetooth its not working
venkatesha kj said:i am not used uart to send the data but just these lines i have used to send the data over bluetooth its not working
You said earlier that you tested the example without modification, and that it did not work. Could you confirm that the example works without modification before we continue with this work?
venkatesha kj said:static uint8_t data_array[BLE_NUS_MAX_DATA_LEN] = {1234};
uint8_t length = 10;ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
Please also share more complete code. In these 3 lines of code it does not seem like you are checking the returned error code from the ble_nus_data_send function. If you do not check the returned error codes you will not be alerted in the case that the function call is unsuccessful.
Could you confirm for me that you are indeed checking the returned error code?
I suspect that the function call to ble_nus_data_send might not have been successful, which would be the reason why you are not seeing any transfers happening. You will also need to make sure that the other side of the link is prepared to decode the values you are sending. The normal operation of the NUS examples receive bytes for ASCII characters, and will display them as such when they print it to their UART. Therefore, if you just send a number, it will still interpret it as an ASCII character, which might produce unexpected outputs.
Best regards,
Karl
venkatesha kj said:i am not used uart to send the data but just these lines i have used to send the data over bluetooth its not working
You said earlier that you tested the example without modification, and that it did not work. Could you confirm that the example works without modification before we continue with this work?
venkatesha kj said:static uint8_t data_array[BLE_NUS_MAX_DATA_LEN] = {1234};
uint8_t length = 10;ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
Please also share more complete code. In these 3 lines of code it does not seem like you are checking the returned error code from the ble_nus_data_send function. If you do not check the returned error codes you will not be alerted in the case that the function call is unsuccessful.
Could you confirm for me that you are indeed checking the returned error code?
I suspect that the function call to ble_nus_data_send might not have been successful, which would be the reason why you are not seeing any transfers happening. You will also need to make sure that the other side of the link is prepared to decode the values you are sending. The normal operation of the NUS examples receive bytes for ASCII characters, and will display them as such when they print it to their UART. Therefore, if you just send a number, it will still interpret it as an ASCII character, which might produce unexpected outputs.
Best regards,
Karl