RE: Sending sensor data via bluetooth LE

KVAJOH — Thu, 18 Jul 2019 15:01:24 GMT

Okey, I just realized I'm a dumbass.

I removed the & in line 16 ble_cus_custom_value_update and now it works.

Thanks for the help though. Sorry for wasting your time.

Aksel

RE: Sending sensor data via bluetooth LE

KVAJOH — Thu, 18 Jul 2019 13:36:25 GMT

Hi,

Thanks for the prompt reply.

Can't seem to get the nrf sniffer to work. I even manually programmed my nrf52 dk board, but the sniffer still couldn't detect it.

I've tried to send to several other devices as well and get the same error. There is clearly something wrong with the application. I tried printing out the custom value in the ble_cus_custom_value_update() function and it looks fine.

But after it I send it it looks like this:

C:\Users\akkvj\Documents\Master\nrf_py\Prototype>python BLE_Trilateration.py NRF52 COM5
Base UUID For Radar-collector: [173, 74, 0, 65, 85, 98, 65, 18, 154, 168, 10, 162, 61, 12, 229, 122]
Value UUID for Radar-collector: 65
Serial port used: COM5
open
Enabling larger ATT MTUs
connect_and_discover
Received advertisment report, address: 0xFDF5061F3241, device_name: Nord
on_gap_evt_connected
New connection: 0
0
Found Device
ATT MTU exchanged: conn_handle=0 att_mtu=133
ATT MTU exchanged: conn_handle=0 att_mtu=133
ATT MTU exchange response: conn_handle=0
on_notification
Connection: 0, 0x41 = [208, 57, 0, 32, 252, 53, 0, 32, 13, 0, 1, 0, 0, 0, 0, 0, 248, 254, 0, 32, 224, 254, 0, 32, 0, 0, 0, 0, 224, 254, 0, 32, 168, 56, 1, 51, 0, 0, 0, 0, 172, 56, 0, 32, 41, 1, 3, 0, 204, 6, 72, 0, 208, 57, 0, 32, 11, 0, 0, 0, 0, 0, 0, 0, 252, 15, 0, 0, 13, 68, 3, 0, 68, 133, 0, 1, 31, 0, 0, 0, 220, 11, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 189, 227, 2, 0, 0, 0, 0, 0, 220, 0, 0, 32, 1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 32, 0, 0, 0, 4, 0, 0, 0, 249, 131, 1, 0, 208, 10]
on_notification
Connection: 0, 0x41 = [208, 57, 0, 32, 252, 53, 0, 32, 13, 0, 1, 0, 0, 0, 0, 0, 248, 254, 0, 32, 224, 254, 0, 32, 0, 0, 0, 0, 224, 254, 0, 32, 168, 56, 1, 51, 0, 0, 0, 0, 172, 56, 0, 32, 41, 1, 3, 0, 204, 6, 72, 0, 208, 57, 0, 32, 12, 0, 0, 0, 0, 0, 0, 0, 252, 15, 0, 0, 13, 68, 3, 0, 68, 133, 0, 1, 31, 0, 0, 0, 220, 11, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 189, 227, 2, 0, 0, 0, 0, 0, 220, 0, 0, 32, 1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 32, 0, 0, 0, 4, 0, 0, 0, 249, 131, 1, 0, 208, 10]
on_notification
Connection: 0, 0x41 = [208, 57, 0, 32, 252, 53, 0, 32, 13, 0, 1, 0, 0, 0, 0, 0, 248, 254, 0, 32, 224, 254, 0, 32, 0, 0, 0, 0, 224, 254, 0, 32, 168, 56, 1, 51, 0, 0, 0, 0, 172, 56, 0, 32, 41, 1, 3, 0, 204, 6, 72, 0, 208, 57, 0, 32, 13, 0, 0, 0, 0, 0, 0, 0, 252, 15, 0, 0, 13, 68, 3, 0, 68, 133, 0, 1, 31, 0, 0, 0, 220, 11, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 189, 227, 2, 0, 0, 0, 0, 0, 220, 0, 0, 32, 1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 32, 0, 0, 0, 4, 0, 0, 0, 249, 131, 1, 0, 208, 10]
on_notification
Connection: 0, 0x41 = [208, 57, 0, 32, 252, 53, 0, 32, 13, 0, 1, 0, 0, 0, 0, 0, 248, 254, 0, 32, 224, 254, 0, 32, 0, 0, 0, 0, 224, 254, 0, 32, 168, 56, 1, 51, 0, 0, 0, 0, 172, 56, 0, 32, 41, 1, 3, 0, 204, 6, 72, 0, 208, 57, 0, 32, 14, 0, 0, 0, 0, 0, 0, 0, 252, 15, 0, 0, 13, 68, 3, 0, 68, 133, 0, 1, 31, 0, 0, 0, 220, 11, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 189, 227, 2, 0, 0, 0, 0, 0, 220, 0, 0, 32, 1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 32, 0, 0, 0, 4, 0, 0, 0, 249, 131, 1, 0, 208, 10]
on_notification
Connection: 0, 0x41 = [208, 57, 0, 32, 252, 53, 0, 32, 13, 0, 1, 0, 0, 0, 0, 0, 248, 254, 0, 32, 224, 254, 0, 32, 0, 0, 0, 0, 224, 254, 0, 32, 168, 56, 1, 51, 0, 0, 0, 0, 172, 56, 0, 32, 41, 1, 3, 0, 204, 6, 72, 0, 208, 57, 0, 32, 15, 0, 0, 0, 0, 0, 0, 0, 252, 15, 0, 0, 13, 68, 3, 0, 68, 133, 0, 1, 31, 0, 0, 0, 220, 11, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 189, 227, 2, 0, 0, 0, 0, 0, 220, 0, 0, 32, 1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 32, 0, 0, 0, 4, 0, 0, 0, 249, 131, 1, 0, 208, 10]
on_notification
Connection: 0, 0x41 = [208, 57, 0, 32, 252, 53, 0, 32, 13, 0, 1, 0, 0, 0, 0, 0, 248, 254, 0, 32, 224, 254, 0, 32, 0, 0, 0, 0, 224, 254, 0, 32, 168, 56, 1, 51, 0, 0, 0, 0, 172, 56, 0, 32, 41, 1, 3, 0, 204, 6, 72, 0, 208, 57, 0, 32, 16, 0, 0, 0, 0, 0, 0, 0, 252, 15, 0, 0, 13, 68, 3, 0, 0, 0, 0, 1, 31, 0, 0, 0, 143, 161, 1, 0, 0, 0, 0, 0, 208, 10, 0, 32, 189, 227, 2, 0, 223, 0, 0, 0, 25, 4, 0, 0, 172, 29, 0, 32, 0, 0, 0, 0, 220, 0, 0, 32, 225, 131, 1, 0, 208, 10, 0, 32, 1, 0, 0, 0, 208, 10]

As you can see all frame values are the same for each transmission. This is even true when i turn the device on and off. I used the pc-ble-driver and nrf connect and both shows the same static values.

Any ideas?

EDIT:

I just found something:

If I print out the custom_value at line 13 in ble_cus_custom_value_update I get the correct value. BUT if I print the hvx_params.p_data below I get the values seen printed out above([208, 57, 0, 32, 252, 53, 0, 32, 13, 0, 1, 0, etc]).

Does this make more sense?

best regards

Aksel

RE: Sending sensor data via bluetooth LE

haakonsh — Thu, 18 Jul 2019 08:20:02 GMT

I suggest you make a sniffer trace of this transfer. If the data goes on-air then the problem lies with the android device, if it does not then there's something wrong with the application.