Change BLE communication setting

[yokokawa]

Please tell me how to change the communication data length of BLE communication to 244 bytes and shorten communication cycle. Thank you.

I am using the version of [nRF5_SDK_15.0.0_a53641a].
Functions for BLE communication differ depending on the version, "ble_nus_string_send ();" in [nRF5_SDK_14.2.0_17b948a] but "ble_nus_data_send ()" in [nRF5_SDK_15.0.0_a53641a].
Please tell me how to set [nRF5_SDK_15.0.0_a53641a].
Thanking you in advance.

[Martin Lesund]

Hi Yokokawa, 

 I am sorry, but I do not understand Japanese. I took your first sentence in "google translate" however and I think I got the meaning of it.

"Please tell me how to change the communication data length of BLE communication to 244 bytes and shorten communication cycle. Thank you."

Please check out the "ATT_MTU Throughput example" in the SDK, and use that as reference on how you can change these parameters.

 

For your second question, I would recommend you to look at the "ble_app_uart example" to see what is the correct way for the SDK v15.

 

If I have misunderstood something, please let me know.

 

Best Regards,

Martin L.

 

[yokokawa]

Please tell me how to change the communication data length of BLE communication to 244 bytes and shorten communication cycle.
Thank you.

[Martin Lesund]

Please check out the "ATT_MTU Throughput example" I listed in last post.

In the documentation:

• The ATT_MTU size can be modified freely between BLE_GATT_ATT_MTU_DEFAULT and NRF_SDH_BLE_GATT_MAX_MTU_SIZE. To enable larger values than BLE_GATT_ATT_MTU_DEFAULT to be used, the application must be recompiled with a different NRF_SDH_BLE_GATT_MAX_MTU_SIZE value.
• The GAP event length can be changed by modifying NRF_SDH_BLE_GAP_EVENT_LENGTH.