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Last activity 2017-04-06 21:44:32 +0200 by Jackson

Can I update connection parameters to low power settings when connected as an HID to iOS?

I use the HID (HOGP) profile for some features of this product. Before the product enters sleep mode, I attempt to update the connection parameters to reduce power consumption with the following settings:

Interval min: 360ms Interval max: 380ms Slave ... (more)

36
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no
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2
answers
Last activity 2017-03-21 11:01:11 +0200 by Kristin flag of Norway

hardfault connection parameter update

Hi,

My NRF52832 runs into the hardfault handler when the sd_ble_gap_conn_param_update() function is called.

I copied the BLE code from the ble_app_template_pca10 project. When I run the code in that project there is no problem, but now the code is ... (more)

233
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1
vote
1
answer
Last activity 2016-10-27 11:28:55 +0200 by Sigurd flag of Norway

Apple Bluetooth Design Guidelines

Hi Nordic Forum!

Looking for the right configuration for the connection parameters, found different references to this Apple guide. The problem is that in the 3rd condition it say:

Interval Min + 20 ms ≤ Interval Max Slave Latency ≤ 4

That condition ... (more)

246
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no
votes
1
answer
Last activity 2016-10-25 18:55:41 +0200 by Sigurd flag of Norway

How to use the default connection paramater as set by the central?

I'm using the nRF52 + SDK11.0.0 + s132 and the ble_hrs example. The function conn_params_init() is called to initialize the connection parameters that the peripheral will request, but where is the actual call to request the new connection parameter ... (more)

57
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no
votes
1
answer
Last activity 2016-09-27 11:01:12 +0200 by Bjørn Spockeli flag of Norway

nRF51 Refuses Connection Parameter Negotiation

Hi,

I have an nRF51 project using SD110 and SDK8.0 that refuses connection parameter negotiation. I a handler that would disconnect bluetooth when a connection parameter negotiation fails and it would disconnect every time it connects to something. Changing ... (more)

561
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no
answers
Last activity 2016-08-16 11:29:06 +0200 by Deepak Kumar

conn_params_init() is not called when MIN_CONN_INTERVAL=7.5

Hi all,

I want to update my connection parameter as follow because I want to connect with both apple and windows devices. By sniffing in Wireshark I found that my IPad device accept connection interval 15ms. And my windows device ... (more)

178
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1
vote
1
answer
Last activity 2016-08-15 15:03:21 +0200 by Petter Myhre flag of Norway

Unable to update Connection Parameter

Hi all,

I want to update my connection parameter as follow:

 #define MIN_CONN_INTERVAL                MSEC_TO_UNITS(7.5, UNIT_1_25_MS)      //400     /**< Minimum acceptable connection interval (0.4 seconds). */
#define MAX_CONN_INTERVAL                MSEC_TO_UNITS(40, UNIT_1_25_MS)     //650      /**< Maximum acceptable connection interval (0.65 second). */
#define SLAVE_LATENCY ...
(more)

1k
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1
vote
1
answer
Last activity 2016-08-09 14:43:58 +0200 by Ole Bauck flag of Norway

Questions about connection interval negotiation

I would like to learn a little more about the process of negotiating a connection interval between an iOS and Android central and a nRF51 peripheral.

So, here are my questions:

  1. I have experimented and saw that I could provide ...
(more)

146
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2
votes
1
answer
Last activity 2016-05-13 09:54:57 +0200 by run_ar

Minimum connection parameters

Hi,

I would like to test the maximum efficency build, with settings like this :

#define MIN_CONN_INTERVAL               MSEC_TO_UNITS(7.5, UNIT_1_25_MS)
#define MAX_CONN_INTERVAL               MSEC_TO_UNITS(7.5, UNIT_1_25_MS)
#define SLAVE_LATENCY                   1000                            
#define CONN_SUP_TIMEOUT                MSEC_TO_UNITS(32000, UNIT_10_MS)

They are taken from BLE_GAP_CP_LIMITS in ... (more)

846
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1
vote
1
answer
Last activity 2015-12-03 16:19:17 +0200 by Ulrich Myhre flag of Norway

What are latency and supervision timeout limits? [closed]

Hey guys,

I'm building a remote control (similar to TV remote) and I'm using nRF51. I am trying to figure out optimal connection parameters so the battery would last as long as possible while the remote would be ... (more)

275
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4
votes
1
answer
Last activity 2015-02-04 21:14:46 +0200 by Locky

Apple Connection Guidelines

Hi Nordic Guy,

I'm trying to fine tune my connection parameters for better battery life, while at the same time trying to keep them within Apple's guideline. I notice in their Bluetooth Design Guidelines that they have 5 ... (more)

798
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2
votes
2
answers
Last activity 2014-12-19 16:53:56 +0200 by Stefan Birnir Sverrisson flag of Iceland

sd_ble_gatts_hvx() and connection parameters

I've finally completed a BLE transmission using tips about connection interval, slave latency and supervision timeout given here. I checked it with Master Control Panel app on my smartphone and with WireShark: after some seconds from connection's initialization ... (more)

671
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4
votes
1
answer
Last activity 2014-12-09 16:44:00 +0200 by Ulrich Myhre flag of Norway

Who set initial connection parameters on BLE?

Hello! I've some doubt about set-up of initial parameters in a BLE connection, using S110.

In ble_app_lbs I try to change the following macro definitions: MIN_CONN_INTERVAL=500ms,
MAX_CONN_INTERVAL=500ms, SLAVE_LATENCY=7, CONN_SUP_TIMEOUT=4000ms,
and from the master control panel ...

(more)

4k
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3
votes
2
answers
Last activity 2014-10-27 15:46:58 +0200 by TobiasMeln71

How to determine the connection interval in android

Did anybody know how I could determine the connection interval for a established ble connection between an android (4.4) central and a (e.g. nRF51822) peripheral?

2k
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10
votes
5
answers
Last activity 2014-10-13 11:14:59 +0200 by boby

Quick connection parameters update

Hello everyone,

I'm currently trying to change the connection parameters to be quick(100ms 0 slave latency) on a button press and after a timer timeout I go back to the low connection parameters.

I'm also sending a ... (more)

2k
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11
votes
2
answers
Last activity 2014-08-27 02:48:35 +0200 by Ali

nRF51822 S110 versus Android Connection Inverval [closed]

For improving my data trouchput (both directions, using »Write without response« and »Notification« like e.g. nRF Uart Example do9, I'd performed some tests regarding the connection parameters (especially connection interval) with different Android devices.

On the Android side ... (more)

1k
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no
votes
1
answer
Last activity 2014-07-28 13:41:52 +0200 by Carles

Connection parameter update handling

Hello,

We are using SDS 6.0.0, SDK 5.2.0 on an nRF51822. Our application is a data logger that can collect up to 128Kbytes of data. Users can connect to the data logger and use our iOS ... (more)

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