2 x nRF52840 used as client/server to make them communicate through python

RE: 2 x nRF52840 used as client/server to make them communicate through python

Sigurd — Wed, 31 May 2023 11:01:46 GMT

Hi,

I don't have any examples, but to verify and "visualize", the behavior, you could use the nRF Sniffer: https://www.nordicsemi.com/Products/Development-tools/nrf-sniffer-for-bluetooth-le

RE: 2 x nRF52840 used as client/server to make them communicate through python

Dan_ — Mon, 22 May 2023 15:50:01 GMT

I managed to implement the indicate with a complete session(but without visualizing the ack, any idea on how to do it? ), now I'm trying to use the write function but I have the previous problem.

Can I ask you to give me an example (based on the "test_server_client.py" file) in which you implement the write with and without ack function (for a complete Central/Peripheral session)?

Thank you

RE: 2 x nRF52840 used as client/server to make them communicate through python

Sigurd — Thu, 11 May 2023 15:08:03 GMT

Hi,

[quote user="Dan_"]What can be very useful is a document with the explanation of the functions that can be used in a python script to setup a connection (with a full session).[/quote]

Much of the terminology and naming of defines, variables, etc is from the SoftDevice, so the SoftDevice documentation could help. E.g. this function. https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s140.api.v7.3.0/group___b_l_e___g_a_t_t_s___f_u_n_c_t_i_o_n_s.html?cp=5_7_4_1_2_4_2_4#ga313fe43c2e93267da668572e885945db

[quote user="Dan_"]In test/test_server_client.py(GitHub) it is shown just a notify example but what about indicate[/quote]

In there we have this function,

def send_data(self, data):
hvx_params = BLEGattsHVXParams(
handle=self.char_handles,
hvx_type=driver.BLE_GATT_HVX_NOTIFICATION,
data=data,
)
self.adapter.driver.ble_gatts_hvx(self.conn_q.get(timeout=2), hvx_params)

change BLE_GATT_HVX_NOTIFICATION to BLE_GATT_HVX_INDICATION to send indication instead. (But the characteristic need to support it as well)

For Write we have this function: write_cmd ( def write_cmd(self, conn_handle, uuid, data, attr_handle=None)
For Read we have this function: read_req ( def read_req(self, conn_handle, uuid, offset=0, attr_handle=None)

RE: 2 x nRF52840 used as client/server to make them communicate through python

Dan_ — Wed, 10 May 2023 12:15:06 GMT

Thank you for the answer,

I have already checked these documents/links but they don't help much to understand in a good way how to best implement this library, even the "pypi.org/project/pc-ble-driver-py/" page (where usually I can find documentation) is blank.

What can be very useful is a document with the explanation of the functions that can be used in a python script to setup a connection (with a full session).

In test/test_server_client.py(GitHub) it is shown just a notify example but what about indicate or read/write? How can I use them?

RE: 2 x nRF52840 used as client/server to make them communicate through python

Sigurd — Tue, 09 May 2023 12:17:49 GMT

Hi,

Did you have look at this file? https://github.com/NordicSemiconductor/pc-ble-driver-py/blob/master/pc_ble_driver_py/examples/heart_rate_collector.py

Jørgen also created something for nordic uart service here: RE: How to use PCA10040 as Dongle Scanner

There is not much documentation on this, expect for what's in the README, https://github.com/NordicSemiconductor/pc-ble-driver-py/blob/master/README.md