# 7,232 questions

1
view
no
no

## Where can I get the nRF51822-EK v1.0 schematics?

I have the older v1.0 board - it isn't quite the same!

Where can I get the v1.0 Hardware Files?

2
views
no
no

## printf with redbearlab nrf51822 board

Hi,

I'm using redbearlab's nrf51822 board. It is a arduino compatible board and hence it is using 0,1 (mapped to 9 and 11 for nrf51822). How do I make printf print to this interface so that I ... (more)

2
views
no
no

## BLE NUS - TX CCCD discovery

Hello,

I'm trying to retrieve data from a nrf51822-based board that supports the BLE NUS sevice (using the ble_nus Library provided for the uart communication example, and the s110 softdevice). I have a few issues using it:

When I ... (more)

54
views
1
vote
2

Hi there,

Is there any way to resolve a BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE address without using whitelist advertising? If not, I guess I should implement the ah function by myself.

I know that Nordic softdevice certainly has this function implemented. My question is ... (more)

5
views
no
no

## ADC input selection change time

I am using internal ADC to sample 2 (sometimes 3) channels on about 333Hz frequency. What I do is:

• set channel 1 as input (always two-thirds prescaling, VBG reference)

• start 3ms repeated timer

• when timer triggers, sampling at chan1 starts ...

(more)

39
views
1
vote
2

## Mesh and PStorage [closed]

I have a problem getting both mesh and persistent storage to work. I am using the code from https://github.com/NordicSemiconducto... and followed the document integrating_w_SD_apps.adoc to integrate the mesh code with the softdevice handler in order to ... (more)

19
views
no
1

## Convert hrs Program to Beacon Style Program

Hi, I have a the nrf51822 chip on a custom board and the ble_hrs code loaded on it. Now I would like this custom board to behave as a beacon with the hrs code sending data. Please what parameters do ... (more)

5
views
no
no

## s110 and max value of app timer

Hi,

What is the largest possible value of "MAX_VAL" for application timer given below:

"#define APP_TIMER_PRESCALER 0"

"#define M_DELAY APP_TIMER_TICKS(MAX_VAL, APP_TIMER_PRESCALER)"

Is it 16 bit value (65535) or other value? How to get the largest possible timeout for application timer?

37
views
no
1

## Characteristics not available with vendor UUIDs

Hi, I'm having some trouble setting up the vendor UUIDs on a nRF51 devkit. I've written a short application based off of the template example, providing a service called 'recording unit'. I based that off of the HRS ... (more)

40
views
no
1

## Data receiving in S130 as a observer

Hi ,

What is the data receiving capacity of the S130 in observer role?

Regards, Anand

12
views
1
vote
2

## How can I add existing file into Keil to build?

I can use "Pack Installer" to copy example from Keil folder to my hard disk driver, for instance, I copy ble_app_cts_c to my personal folder. I can build and flash ble_app_cts_c into my nRF51 DK. Now, I want to add ... (more)

28
views
1
vote
2

## Nrf51822 dongle,receive data from beacon

Hi, I want to read data ,wich is sent from beacon ,using usb dongle,and after this ,I want to send data received from beacon to pc through serial port. Exist any example for this?

11
views
no
1

## Disconnect based on signal strength

Hey.

I am wondering if there is a way to disconnect a slave from a master based on the strength on the connection and not when they naturally loose connection.

To give an example:

If someone is connected to a ... (more)

19
views
no
1

## How to block bluetooth signals

How do I block Bluetooth signals ? (I want the signals to be transmitted 180 degrees, not 360 degrees)

I have read it could be done with aluminium foil, but I have not tried it.

34
views
no
1

## Can I write to the UICR registers with a Segger and JLink?

I want to write a device ID to the UICR registers at the same time as I flash the app code. I don't use Keil or that nrfproj.exe thing, I'm on a Mac. I have these targets ... (more)

28
views
1
vote
1

I'm trying to figure out how the bonding works in the multilink demo. It seems like the central device only goes through the bonding if the peripheral has the multilink service running on it. ie right here:

    case BLE_GATTC_EVT_WRITE_RSP ...
(more)

19
views
1
vote
1

## Brown-out (or Power-On-Failure) detection in low voltage mode setup (supply is 1.8V)

Hi, everyone. I would like to be notified about the brown-out on my device. I know about POF peripheral, but lowest possible threshold is NRF_POWER_THRESHOLD_V21 (which is 2.1V). I'm using low voltage mode on my device, which means ... (more)

9
views
no
no

## pairing ble

Hello, I use the example ble_app_hrs_c_s130_pca10031 with the nrf51 dongle (#define ENABLE_DEBUG_LOG_SUPPORT) and a nrf51822 as a ble sniffer. In addition i use 2 Polar H7 Belt. Pairing works with the first transmitting belt, also with 2 belts if i ... (more)

7
views
no
1

## what are the changes in apis in new stack(8) [closed]

I am migrating my stack from 7 to 8.I am finding that there are so many api changes in btle communication.Am I correct ,please share the change log.

31
views
2
2

## What are changes in new btle stack (8)

I am migrating my stack from 7 to 8.I am finding that there are so many api changes in btle communication.Am I correct ,please share the change log.

11
views
no
1

## Gazell libraries Details

We are looking at using the Gazell protocol for a project. There isn't much information out there except for the "Gazell Link Layer User's Guide"

https://developer.nordicsemi.com/nRF5...

Can someone explain what the differences are between ... (more)

15
views
1
vote
1

## nRF24L01+ Not Receiving ACK

Hi,

I've been working with a two LPC1768 boards with connections to Addicore nRF24L01+ boards.

I have not been able to successfully receive an ack on the PTX board although I see data arriving on the receiver platform. I ... (more)

19
views
no
1

## Odd BLE notification problem, Windows 8.1

uint8_t readings[20] = { 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 ...
(more)

111
views
2
1

## Dfu for softdevice120

hi. as far as i know, dfu for softdevice 110 can be carried out over ble, while s120 can not. so i have to implement a bootloader for an app with s120 through wired. is there any available example for ... (more)

6
views
no
1

## I need bootloader for s120 in sdk 6.0

i need bootloader for s120 which used uart to updata the app!!!!

28
views
no
1

## Device manager DM_EVT_SECURITY_SETUP_COMPLETE error

I'm using s110 softdevice 6.1 SDK. I do bonding in my application the same way as in the ble_app_hrs example (bond, no_mitm). I have a charactarestic set to SEC_MODE_SET_ENC_NO_MITM. I use writing into this characteristic initially to trigger ... (more)

1
view
no
no

## Unable to get BLE_Gateway from nRF51-ble-bcast-mesh working

I've gotten two PCA10001 boards working with the LED_mesh sample.

I cannot get the third board to run BLE_Gateway (it does not react to button presses, nor is it discoverable with nRF Master Control Panel).

I'm using s110_nrf51822_7 ... (more)

29
views
no
1

"The Bootloader/DFU with SoftDevice update example shows how a SoftDevice, bootloader, and pplication (sic) can be updated on aN (sic) nRF51822 chip"

The typo "pplication" is repeated throughout.

But my main query is ... (more)

17
views
no
1

## Typical current consumption for PORT GPIOTE Interrupts?

Hello

What is a typical current draw when using a PORT GPIOTE interrupt? I seem to be drawing approximately 200uA with a port event enabled. Is this normal?

I'm using a custom nRF51 board and when I send the ... (more)

12
views
no
1

## Interrupt doesnt occur while using ADC with ESB protocol

Hello everyone, I am using ADC functionality with NRF51822 and its working fine, Interrupt is raising when ever i give input to Analog Pin. Communication protocol i use is bluetooth. But recently i switched to ESB protocol and when i ... (more)

#### Statistics

• Total users: 4942
• Latest user: byron8899
• Resolved questions: 3435
• Total questions: 7232

## Recent blog posts

• ### Workaround needed for TWI driver (nrf_drv_twi) in SDK v8.1 (TWI_COUNT missing)

Posted 2015-05-20 13:40:08 by Hung Bui
• ### Programming the nRF51822 Beacon Kit with the nRF51DK

Posted 2015-05-07 16:13:39 by Fredrik Sundt Brynhildsvoll
• ### Common FAQ on DFU

Posted 2015-05-15 19:46:33 by Hung Bui
• ### A quick presentation on how nRF51 DFU works

Posted 2015-04-30 13:35:29 by Hung Bui
• ### nRF51822 mbug ecosystem

Posted 2015-04-17 00:17:12 by Joel

## Recent questions

• ### Where can I get the nRF51822-EK v1.0 schematics?

Posted 2015-05-22 21:02:09 by awneil
• ### printf with redbearlab nrf51822 board

Posted 2015-05-22 20:02:37 by RTR
• ### BLE NUS - TX CCCD discovery

Posted 2015-05-22 18:55:09 by Robin ANSIAS
• ### ADC input selection change time

Posted 2015-05-22 17:21:54 by Wojtek