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# 633 questions

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48
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no
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2
answers

## nRF8001, nRF51422 or nRF51822

Hi,

It's my first post here so let introduce myself : I'm a 25 y.o. French electronics engineer and hobbyist. I also like skating (inline skates and ice skates) mainly slalom, jumps, speed run, street ride... And I ... (more)

40
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no
votes
1
answer

## Bluetooth + long timeslot

Hi,

I want to use Timeslot API in order to gain uninterruptible period of time (1 second~) along with running Softdevice - just single one, not periodical.

I've changed connection parameters to include longer connection supervision timeout and slave latency ... (more)

62
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no
votes
1
answer

## Do I need a Balun for very short range?

I'm using a 51422 for a very short range, fixed system. I will never need the chip to receive or be received from more than 5 meters away, and more often just 2-3 meters. On my custom PCB the ... (more)

68
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no
votes
1
answer

## How to Read status of gpio(pin 12) whether it is high or low?

I am getting confused when using nrf_gpio_cfg_input(PIN_12,NRF_GPIO_PIN_PULLDOWN) should i keep it as NRF_GPIO_PIN_PULLDOWN,PULLUP or should i use NRF_GPIO_PIN_SENSE_HIGH. I want to connect a button to pin 12 and depending on whether it is high or low switch ... (more)

33
views
2
votes
1
answer

## I2c + timer1 + timer2 + softdevice(S210)

Hi Nordic,

My application does the following:

• Timer 2 takes care of controlling a shift register (CLK and DATA)
• Timer 1 takes care of polling data from sensor via I2C, each 10ms
• We are continuously sending and receiving data from ...
(more)

27
views
2
votes
1
answer

## How to properly monitor for BLE GAP disconnect event?

I'm working on a proximity beacon application using the nRF51 DK and a Nordic Beacon. The application basically has the nRF51 DK connect to the Beacon and monitor the RSSI. If the RSSI changes dramatically, execute a series of ... (more)

33
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no
votes
1
answer

## Can PCA10028 can be DFU Controller?

I'm wondering if it can be work as an DFU Controller (where sends zip Distribution Packet) not as an DFU Target.

I'm trying to make Each of the NRF51 Cores to be updated and make update each other ... (more)

64
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no
votes
2
answers

## Can't run modified nrf51-DK example on custom board

Hi. I took the ble_central/experimental/ble_app_blinky_c example and modified it for my needs. It works on the nrf51-DK. Now I want to use it on a custom board with nrf51822qfab. I modified the Makefile in the following way:

changed ... (more)

43
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no
votes
1
answer

## Central role with high Bandwidth problem

Hi,

I am using a custom board with a nrf51422, SDK11, S130 v2.0.1 with central role.

I have made changes on the code to change from MID bandwidth to High. I added the following code to the ble_stack_init ... (more)

40
views
1
vote
1
answer

## What is NRF_P0 in the {SDK_PATH}/components/drivers_nrf/hal/nrf_gpio.h

I'm using Keil5 to compile example of SDK v12.2. And I'm trying to understand each of Source code to understand how each of it is consists of.

I opened an example "SDK/Examples/peripheral/blinky/pca10028". (I ... (more)

31
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no
votes
no
answers

## Difficulies to implement acknoledgement on ant asynchrone link.

Hello,

I have some difficulties to make an ant acknoledgement with my nrf51422 (s210), and i would be grateful if you could help me with it. (SDK used 12.2)

I have 2 modules nrf51422 that communicate in ant:

• A ...

(more)

40
views
1
vote
no
answers

## How to read sensor data on nrf51dk(nrf51422) using iot sdk on coap?

I have set up raspberry pi 3 as a border router and programmed the the nrf51422 using the iot_ipv6_coap_server_pca10028 and could successfully switch on and off led3 and led4 using copper coap, which example to use in the iot sdk ... (more)

41
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no
votes
1
answer

## Can send but not receive custom board. nRF51422. ANT S210.

Hi Nordic,

I have an application that perfectly runs in the nrf51DK but that does not work in my custom board. In my custom board everything else works (i2c, leds lighting, etc..) except for the communication related stuff. The weird ... (more)

105
views
3
votes
4
answers

## Problem with radio frequency custom board. Balun mismatch?

Hi Nordic,

I have an application that perfectly runs in the nrf51DK but that does not work in my custom board. In my custom board everything else works (i2c, leds lighting, etc..) except for the communication related stuff. I think ... (more)

59
views
3
votes
1
answer

## can i control pin 24(or any other) on nrf51 dk(nrf51422) using iot sdk?

I have set up raspberry pi 3 as a border router and programmed the the nrf51422 using the iot_ipv6_coap_server_pca10028 and could successfully switch on and off led3 and led4 using copper coap,can i control pin24 on nrf51dk if yes ... (more)

24
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no
votes
1
answer

## error in compilation of led blinking using gpio?

upload.jpg undifined symbol rfgpio_cfg_output(refered from main)

62
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no
votes
2
answers

## Including C++ library in C project?

Hi Nordic,

I want to include this library (https://github.com/jrowberg/i2cdevlib...) in my project, which is an evolution from ant_ broadcast example, in C. However, and after reading several related posts, I am not able to compile my ... (more)

46
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no
votes
1
answer

## NRF51422 Bluetooth: Long time between send and receive from message

Hello together,

I' am working on a Bluetooth application and have a problem with the transmitting time of the Bluetooth.

In this Screenshot you can see the end of my command which i want to send from my NRF422 to ... (more)

1k
views
11
votes
3
answers

## External programming Using nRF52-DK

Hello

I have a nRF52-DK and I am trying to programme an external designed by myself but this one contains the nRF51422 chip. I am using nRFGO Studio to upload the .HEX file.

Do you know if it is possible ... (more)

41
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no
votes
1
answer

## is the tx power configurable for nrf51422 rev 3 with ble

we use nrf51422, rev 3, sd 130 1.0.0, with ble central functionality and we look for a example to set the tx-power as high as possible.

66
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1
vote
1
answer

## How to set p_start_addr for fstorage manually (SDK 12.1)?

I would like to set the the fstorage memory location manually through fs_init() within SDK 12.1, but I am not sure how to do this. There's comments that is can be done manually, but I do not know ... (more)

114
views
1
vote
1
answer

## MPU6050 with DMP fully support? [nRF51422]

Hi Nordic,

For my application, I want to have the absolute acceleration (without gravity) from a MPU6050. I know that this device can do that because it has 6 axis and a Digital Motion Processor (DMP). Do you guys have ... (more)

106
views
1
vote
2
answers

## Is there some sort of assurance that ble packets get to the application undamaged and in the correct order?

Hey Guys,

im working on some sort of application transport layer for ble and have some questions to better plan what i need and what is kind of redundant. Is it correct that in the lower layers of the ble ... (more)

79
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no
votes
1
answer

## TWI Troubles With nRF51 DK and MMA8452 Accelerometer

I have an accelerometer that utilizes IC2 (NXP MMA8452Q) that I am trying to integrate with the nRF51 DK. The accelerometer is on a breakout board, and is wired up very simply using the SCL, SDA, and the power supply ... (more)

46
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no
votes
1
answer

## Invalid state error when stopping app_timers

Hi All,

I have got a project running on an nRF51422 QFAC, using the lastest SDK.

I am having some problems with the app_timers, i am able to create and start them, and they work ok, but i cannot stop ... (more)

132
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no
votes
1
answer

## Ble Mesh protocol

we have two nrf51-dks and we wanna create a ble mesh. how can we set a ble mesh and same time ble advertising on Nrf51422 DK (PCA10028 V1.2.0) Board with using examples on http://github.com/NordicSemiconductor...

41
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no
votes
1
answer

## can i use this tutorial on nrf51422?

hi in this i see the Capacitive touch library . can i use it with nrf51422?

137
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no
votes
no
answers

## s130 notification problem

Hi,

I'm developing simple bluetooth app, where I'm using 3 custom services, each one has characteristic with notification option.

But only the first service notification is working. The other 2 characteristics send notification without error (device side), but ... (more)

264
views
2
votes
1
answer

## How is flashing done on custom hardware?

I am laying out a board in altium using the nRF51422 - just cutting out the essential pieces in the silk box from the nRF51 DK altium project.

I have some concerns. Once I have removed the arm3 mcu that does ... (more)

127
views
3
votes
1
answer

## Relation between addresses and pages in flash

Hi Nordic,

I am trying to figure out the relation between a certain page number (say, 0xFE) and the group of addresses that it contains. How can I get this relation?

Thanks!

#### Statistics

• Total users: 16311
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• Resolved questions: 8512
• Unanswered questions: 2249
• Total questions: 19842

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## Recent blog posts

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• ### New NFC feature on nRF52 Series: Read/write capable Type 4 Tag NFC library in nRF5 SDK.

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Posted 2017-02-19 11:20:18 by Roger Clark