Connection problem to nRF51822 from Linux

RE: Connection problem to nRF51822 from Linux

Kenneth — Mon, 07 Oct 2019 07:01:18 GMT

Seems you have enabled MITM, and the passkey you see there you must insert into the peripheral as shown in the message sequence chart:
https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v7.0.1/group___b_l_e___g_a_p___p_e_r_i_p_h___b_o_n_d_i_n_g___p_k___c_e_n_t_r_a_l___o_o_b___m_s_c.html

For debugging you may disable MITM for now.

RE: Connection problem to nRF51822 from Linux

martonmiklos — Thu, 03 Oct 2019 19:27:31 GMT

For the sake of posterity:

- I have deleted the connection from bluetoothctrl with

```[bluetooth]# remove E8:83:76:AE:34:7D
[DEL] Device E8:83:76:AE:34:7D MM-keyboard
Device has been removed```

Then scanned again, and I am able to connect:

```

Attempting to connect to E8:83:76:AE:34:7D
[CHG] Device E8:83:76:AE:34:7D Connected: yes
Connection successful
[NEW] Primary Service
/org/bluez/hci1/dev_E8_83_76_AE_34_7D/service0008
00001801-0000-1000-8000-00805f9b34fb
Generic Attribute Profile
[NEW] Primary Service
/org/bluez/hci1/dev_E8_83_76_AE_34_7D/service0009
0000180a-0000-1000-8000-00805f9b34fb
Device Information
[NEW] Characteristic
/org/bluez/hci1/dev_E8_83_76_AE_34_7D/service0009/char000a
00002a29-0000-1000-8000-00805f9b34fb
Manufacturer Name String
[NEW] Characteristic
/org/bluez/hci1/dev_E8_83_76_AE_34_7D/service0009/char000c
00002a50-0000-1000-8000-00805f9b34fb
PnP ID
[CHG] Device E8:83:76:AE:34:7D UUIDs: 00001800-0000-1000-8000-00805f9b34fb
[CHG] Device E8:83:76:AE:34:7D UUIDs: 00001801-0000-1000-8000-00805f9b34fb
[CHG] Device E8:83:76:AE:34:7D UUIDs: 0000180a-0000-1000-8000-00805f9b34fb
[CHG] Device E8:83:76:AE:34:7D UUIDs: 0000180f-0000-1000-8000-00805f9b34fb
[CHG] Device E8:83:76:AE:34:7D ServicesResolved: yes
[agent] Passkey: 581922

```

Now I am facing with an another issue: I cannot get it paired and the connection is broken from time-to time.

RE: Connection problem to nRF51822 from Linux

martonmiklos — Thu, 03 Oct 2019 18:53:32 GMT

Just tried it, unfortunately it has the same issue.

RE: Connection problem to nRF51822 from Linux

martonmiklos — Thu, 03 Oct 2019 07:22:00 GMT

Thanks Kenneth, I will give it a try and report back!

RE: Connection problem to nRF51822 from Linux

Kenneth — Wed, 02 Oct 2019 11:06:41 GMT

I am not familiar with linux, but I notice in your log it says: "Status: PIN or Key Missing (0x06)", I think the following suggestion will fix that:

https://devzone.nordicsemi.com/f/nordic-q-a/47718/pairing-rejected-by-nordic_bps/189277#189277