pc-ble-driver connection problem

RE: pc-ble-driver connection problem

Jørgen Holmefjord — Mon, 30 Jan 2017 09:42:46 GMT

The connectivity firmware for S132 v3.0.0 is available in SDK 12.1.0 and SDK 12.2.0, in [SDK_ROOT]\examples\ble_central_and_peripheral\ble_connectivity\pca10040\ser_s132_hci. Note that you have to patch your SDK using the patch and method described here.

RE: pc-ble-driver connection problem

Jong yoon lee — Sun, 29 Jan 2017 23:37:07 GMT

Hello, How do I compile one for 1M. Is there a repository I can download and change these parameters?

RE: pc-ble-driver connection problem

Jørgen Holmefjord — Mon, 23 Jan 2017 08:04:57 GMT

Yes, it is 115K.

RE: pc-ble-driver connection problem

Jong yoon lee — Fri, 20 Jan 2017 18:40:34 GMT

Thank you so much for your support.What is the communication speed of the firmware you posted. Is it 115K?

RE: pc-ble-driver connection problem

Jørgen Holmefjord — Fri, 20 Jan 2017 10:29:40 GMT

Which version of pc-ble-driver-py do you use? Error code 0x04 means NRF_ERROR_NO_MEM, so I think the problem with more than 5 connections is due to not enough RAM available for the softdevice in the precompiled connectivity hex-file. I compiled the connectivity firmware for PCA10040 with increased RAM space for softdevice and tested with pc-ble-driver-py v0.8.0 (can be installed using pip install pc-ble-driver-py==0.8.0) and this works with CONNECTIONS set to 8.

RE: pc-ble-driver connection problem

Jong yoon lee — Tue, 17 Jan 2017 16:02:32 GMT

Today I will do the same test with the sampling rate high( maybe 100 HZ) and let you know of the result. Thank you update: I did the test for 100Hz and I did not have any connection issue. I will test with the 1M hex for the next test. I still get the random problem stated above

RE: pc-ble-driver connection problem

Jong yoon lee — Tue, 17 Jan 2017 16:00:13 GMT

Also, When the central device is advertising and trying to connect with the perperial device, it would give me these errors sometime. What does these error mean and what do I need to do to fix them

New connection: 0
Disconnected: 0 BLEHci.conn_failed_to_be_established
Traceback (most recent call last):
  File "heart_rate_collector.py", line 187, in <module>
    main(serial_port)
  File "heart_rate_collector.py", line 151, in main
    conn_handle = collector.connect_and_discover()
  File "heart_rate_collector.py", line 90, in connect_and_discover
    att_mtu = self.adapter.att_mtu_exchange(new_conn)
  File "C:\Python27\lib\site-packages\pc_ble_driver_py\ble_adapter.py", line 166, in att_mtu_exchange
    return self.db_conns[conn_handle].att_mtu
KeyError: 0L


-------------------------------------------------------------------------------------------------------------

Connection: 1, 0x2A37 (Standard.heart_rate) = [22L, 220L, 121L, 1L, 120L, 1L, 119L, 1L, 118L, 1L, 117L, 1L, 116L, 1L]
Received advertisment report, address: 0xDC6CA5B384C1, device_name: Nordic_HRM
Connection: 0, 0x2A37 (Standard.heart_rate) = [21L, 14L, 1L, 175L, 1L, 174L, 1L, 173L, 1L, 172L, 1L, 171L, 1L, 170L, 1L]
Connection: 0, 0x2A37 (Standard.heart_rate) = [5L, 24L, 1L]
Connection: 0, 0x2A37 (Standard.heart_rate) = [5L, 34L, 1L]
Connection: 1, 0x2A37 (Standard.heart_rate) = [6L, 230L]
Connection: 1, 0x2A37 (Standard.heart_rate) = [6L, 240L]
Connection: 1, 0x2A37 (Standard.heart_rate) = [22L, 250L, 115L, 1L, 114L, 1L, 113L, 1L, 112L, 1L, 111L, 1L, 110L, 1L]
Connection: 1, 0x2A37 (Standard.heart_rate) = [7L, 4L, 1L]
Connection: 0, 0x2A19 (Standard.battery_level) = [88L]
Connection: 0, 0x2A37 (Standard.heart_rate) = [21L, 44L, 1L, 169L, 1L, 168L, 1L, 167L, 1L, 166L, 1L, 165L, 1L, 164L, 1L]
Connection: 0, 0x2A37 (Standard.heart_rate) = [5L, 34L, 1L]
New connection: 2
Connection: 1, 0x2A37 (Standard.heart_rate) = [7L, 14L, 1L]
Connection: 1, 0x2A37 (Standard.heart_rate) = [23L, 24L, 1L, 109L, 1L, 108L, 1L, 107L, 1L, 106L, 1L, 105L, 1L, 104L, 1L]
Connection: 0, 0x2A37 (Standard.heart_rate) = [5L, 24L, 1L]
Connection: 0, 0x2A37 (Standard.heart_rate) = [21L, 14L, 1L, 163L, 1L, 162L, 1L, 161L, 1L, 160L, 1L, 159L, 1L, 158L, 1L]
Connection: 1, 0x2A37 (Standard.heart_rate) = [7L, 34L, 1L]
Connection: 0, 0x2A37 (Standard.heart_rate) = [5L, 4L, 1L]
Disconnected: 2 BLEHci.conn_failed_to_be_established
Connection: 1, 0x2A37 (Standard.heart_rate) = [7L, 44L, 1L]
Connection: 0, 0x2A37 (Standard.heart_rate) = [4L, 250L]
Connection: 1, 0x2A37 (Standard.heart_rate) = [23L, 34L, 1L, 103L, 1L, 102L, 1L, 101L, 1L, 100L, 1L, 99L, 1L, 98L, 1L]
Connection: 0, 0x2A37 (Standard.heart_rate) = [20L, 240L, 157L, 1L, 156L, 1L, 155L, 1L, 154L, 1L, 153L, 1L, 152L, 1L]

Traceback (most recent call last):
  File "heart_rate_collector.py", line 189, in <module>
    main(serial_port)
  File "heart_rate_collector.py", line 151, in main
    conn_handle = collector.connect_and_discover()
  File "heart_rate_collector.py", line 90, in connect_and_discover
    att_mtu = self.adapter.att_mtu_exchange(new_conn)
  File "C:\Python27\lib\site-packages\pc_ble_driver_py\ble_adapter.py", line 166, in att_mtu_exchange
    return self.db_conns[conn_handle].att_mtu
KeyError: 2L

RE: pc-ble-driver connection problem

Jong yoon lee — Tue, 17 Jan 2017 15:57:19 GMT

Hello, I did some test with the examples given(heart_rate_collector.py) as you suggested. I changed the CONNECTIONS to 5 and ran it over night with a youtube video on. There wasn't any connection problems at all Hoverever I found some bugs? that happened with the example.First, my application needs to have 8 ble connected concurrently but the example given only always up to 5 connections and if I try any number higher than 5, it would give this error

C:\Python27\Lib\site-packages\pc_ble_driver_py\examples>python heart_rate_collector.py NRF52
        0 : COM3: 682160565

Enter your choice: 0
Serial port used: COM3
Enabling larger ATT MTUs
Traceback (most recent call last):
  File "heart_rate_collector.py", line 189, in <module>
    main(serial_port)
  File "heart_rate_collector.py", line 149, in main
    collector.open()
  File "heart_rate_collector.py", line 78, in open
    self.adapter.driver.ble_enable(ble_enable_params)
  File "C:\Python27\lib\site-packages\wrapt\wrappers.py", line 561, in __call__
    args, kwargs)
  File "C:\Python27\lib\site-packages\pc_ble_driver_py\ble_driver.py", line 126, in wrapper
    raise NordicSemiException('Failed to {}. Error code: {}'.format(wrapped.__name__, err_code))
pc_ble_driver_py.exceptions.NordicSemiException: Failed to ble_enable. Error code: 4

RE: pc-ble-driver connection problem

Jørgen Holmefjord — Thu, 12 Jan 2017 12:52:26 GMT

Are you using the nRF52 DK with the pc-ble-driver or another board? Have you tried doing some debugging to see where in your program the error occurs? Can you try the example provided with the pc-ble-driver-py to see if this has similar problems?

RE: pc-ble-driver connection problem

Jong yoon lee — Thu, 12 Jan 2017 09:43:45 GMT

Thank you for looking into my problem. I would say that something is wrong with my gui if I get this problem right away but this problem also happens for long runs. So I would get the same symptoms when I run the driver for a long time ( so i will get disconnected with all my connected peripheral ble devices ~40 minutes into running my program). Do you have any comments on this?

RE: pc-ble-driver connection problem

Jørgen Holmefjord — Thu, 12 Jan 2017 09:37:23 GMT

It sounds like there is an issue with your GUI. Have you tried running the command line examples? The error code you get (12289 - 0x3001) is BLE_ERROR_NOT_ENABLED, which means that sd_ble_enable has not been called.