Ble

RE: Ble

Edvin — Wed, 14 Feb 2018 08:48:36 GMT

I have sent you a friend request. We can take the personal details in PM.

RE: Ble

Manoj Hiwarkar — Tue, 13 Feb 2018 07:51:13 GMT

Can you please give me your personal email id. The file size is large, cannot be uploaded here

RE: Ble

Edvin — Fri, 09 Feb 2018 13:53:12 GMT

Please send me a personal message. I have opened it "for everyone".

RE: Ble

Manoj Hiwarkar — Fri, 09 Feb 2018 11:28:39 GMT

Thanks for your concern.Some files & functions those you have mentioned are not present in my project file. Can you please view my code? it will be great help. Please give me your email id.

RE: Ble

Edvin — Thu, 08 Feb 2018 14:30:16 GMT

Hello Manoj Hiwarkar,

Have you modified anything inside ble_nus_string_send? If you look inside this function, what is your BLE_NUS_MAX_DATA_LEN? I assume it is larger than 20, since you do not reveice NRF_ERROR_INVALID_PARAM, but can you check what it is?

Can you also check in sdk_config.h, what is the value of NRF_SDH_BLE_GATT_MAX_MTU_SIZE?

Also, if you used the ble_app_uart example, I assume you have the function gatt_init() in main.c. What parameters do you pass into nrf_ble_gatt_att_mtu_periph_set() inside gatt_init()?

And lastly, can you check inside gatt_evt_handler(), it should set

m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;

Can you check what m_ble_nus_max_data_len is after this event? Try to print it in the RTT-log, or using printf for the uart.

Best regards,

Edvin

RE: Ble

Manoj Hiwarkar — Sat, 03 Feb 2018 05:05:24 GMT

Sir I am sending the values one by one & not at a time.The maximum size of one value is only 2 byte. Is there pointer value that we can change. Especially "&m_nus"

RE: Ble

nar0909 — Fri, 02 Feb 2018 20:42:49 GMT

Hi Manoj Hiwarkar,

ble limitation : send 20 bytes and receive 20 bytes.

Not sure what data type your 40 values are but the commonly used data type is bytes.

So byte array[20] will be the max transfer limit over ble and likewise ble will only receive bytes[20] at a given time.

There are ways on how you could send/receive data more than 20 bytes long.

https://devzone.nordicsemi.com/f/nordic-q-a/553/dealing-large-data-packet-s-through-ble

I would recommend using nRFToolbox or nRF Connect for uart service, just because it's more efficient.

And you have mentioned your receiving only 6 values? So what data type are you trying to send?