nrf52832 , SDK_V15.3 , ble_app_uart sample code , data communication noncontinuous & disappear problem.

[PhilS]

nrf52832 , SDK_V15.3 , ble_app_uart sample code , data communication problem.

Hello there...

I use the SDK V15.2, ble_app_uart sample code, on the nrf52832

seems the ble already could support long write,

but actually I found the BLE communication data is sperate in 20 bytes chunk,

then cause the nrf52832 cann't control the device normally.

I serach the "long write", "ble uart" ,"ble_uart 20 bytes" key word on the DevZone,

but I cann't get it. I sure about the problem by the test:

I make the "ble_nus_data_send(&m_nus, data_array, data_array_len, m_conn_handle)" send out

declared data_array & data_array_len , the device contorl by nrf52832 is correct.

But when I send the same data from the APP through the nrf52832 to the device,

the device working abnormal.

Then I use the UART output the data, the data after the 20th byte disappear become zero.

But I can out put the recevice data from the APP by UART on PC before I send out the data through the nrf52832 to the device,

, although the data is sperate in 20 bytes chunk. ( I use the "app_uart_put(0xFF) to test that, after the whole data (25bytes) out put by uart on the PC by for loop i "app_uart_put(data_array[i]);", then the "0xFF" become the 21th byte on the PC putty tool ).

So I like to know what's different about the declared data_array and the BLE communication data workink on the nrf52832, use the same "app_uart_put( ) & ble_nus_data_send" function?

And how to solve the problem?

[Jared]

Hi,

I'm not sure I understand your problem correctly. You're trying to send data over BLE that is over 20 byte and observe that the data is not printed after 20 bytes on the UART, but is indeed sent to the APP. You're now wondering why you can't print out all the data that you send but can successfully send the data over BLE. Did I understand your problem correct? Could you share a minimal project that reproduces the issue and will run on a development kit?

regards

Jared