# 26,110 questions

112
views
no
1

## C10 in reference design

Greetings,

I am trying to minimize my BOM line items. Can C10 decoupling capacitor stated as 47nF/X5R on the reference design be replaced with 100nF/X5R without consequence?

This capacitor is applied to nRF51822 DEC2 pad.

152
views
no
1

## BLE/2.4GHz concurrent example

Hi,

Are there some BLE/2.4GHz concurrent application examples for reference? Thanks.

434
views
no
1

## Pwm and softdevice nRF51822 [closed]

Hello,

I know that this question was here before, but I've read all of the questions and answers and still I don't know what I do wrong.

I'm using 3 PWM channels to controll RGB led, and ... (more)

181
views
no
1

## How to use PCA10024 as MCP dongle [closed]

Hello -

I'm not having any success using my PCA10024 as a dongle for MCP. Here is what I'm doing so far....

1. Remove PCA10024 jumper from P0.30-GND.
2. Connect PCA10024 to Win7 PC - MBED (G:) enumerates.
3. Copy MEFW_nRF51822_0.9 ...
(more)

742
views
no
2

## Flashing nRF51822 with U-link2 [closed]

I am using keil compiler. The nRF51822 stack succesfuly compiled and also i am created the hex.I don't have j-link programmer but i will try to download using Ulink2 can u help me

here i attached the circuit ... (more)

285
views
1
vote
3

## LWM2M Protocol on the NRF51 IPv6 Bluetooth Stack

Hello,

Does the NRF IOT SDK have any support for the LWM2M application protocol or is there an implementation of LWM2M on the IPv6 Bluetooth Stack?

Imran

272
views
no
1

## Need OVERRIDE in NRF radio mode?

The nRF51 Series Reference Manual v3.0 notes the potential need to set the OVERRIDEx registers in the radio mode to values from FICR.BLE_1MBIT to meet deviation requirements for BLE (per PCN-083 rev 1.1). FICR also contains override ... (more)

119
views
no
2

## 51822 HFClock frequency problem

hi, i am working on a project which needs a relatively accurate high frquency clock. when i ran my program without softdevice, the HF clock's accurency could fullfil our requirement. but when softdevice (s110 v7.0.0)is used ... (more)

92
views
1
vote
1

## Revisiting PAs for nRF51

Hi,

There was a thread about using PAs (and not LNAs) with the nRF51 a while back with some good advice.

One question I still have: is there currently any way to support an ENABLE line for a PA for ... (more)

372
views
no
2

## NRF and mpu9150/6050

Hi I'm working on a school project and I need to send data from an accelerometer to a phone I'm currently able to update "dummy" data from my nrf51822 to my phone after following the examples provided in ... (more)

462
views
no
2

## nRF51822_xxAC RAM/ROM layout [closed]

Hello - I'd like to make sure my RAM/ROM layout for the nRF51822_XXACis OK - if someone has a minute to double-check it that'd be great.

I started with the "nRF51822 Beacon v1.1.0" example source code and ... (more)

1k
views
no
3

## How to set up GCC and Eclipse for development on the beacon kit

Hi,

I am looking to select a bluetooth chip for a new project, one of the criteria is access to free development tools. I see that in the SDK GCC is supported. But: how do I set this up? Is ... (more)

114
views
1
vote
1

## Configure Bluetooth Smart UUID [closed]

How can I modify the UUID/Advertisment value that is being transmitted by the nRF51822 bluetooth Smart device ?

202
views
no
1

## Could I write or update flash without softdevice ? [closed]

Hi, Could I write or update flash without softdevice ? Due to I must update softdevice on our product, but it doesn't have any JTAG Interface, so, I want to use our application to reprogram softdevice by UART interface.

15k
views
35
6

## What is the power and clock model of peripheral in NRF51? [closed]

Hello,

I was puzzled by RM.

I notice POWER control register in peripheral(UART,SPI,TWI) module.

1. Will UART be powered when system power ...
(more)

358
views
1
vote
1

Hi, I want to start TIMER1 by a GPIO_TE. When the program enter the TIMER1_IRQHandler(), I want to disable the ppi. And when the program leave the TIMER1_IRQHandler(), I want to enable the ppi again. But I found once I ... (more)

1k
views
4
2

## Sending data bigger than 20 byte with ble

Hi Im working on the project which relates to sending data through ble. I use nrf51822 Evaluation kit and the data is from uart. How do I send data greater than 20 bytes. No matter how i change the parameters ... (more)

1k
views
5
1

## NRF51822 and one wire [closed]

(I know it has been asked before, but I thought I'd check in again..) Has anyone had any success implementing the Dallas one-wire protocol on the NRF51822 - in particular with the DS18B20 temperature sensor?

883
views
7
4

## What is the right way to flash s110 7.1.0? [closed]

Hi,

I'm on OSX, and I'm having problems where the first service calls I make on my own device fails but work fine on the second generation Nordic development board.

I am pretty sure I'm compiling my ... (more)

2k
views
2
3

## nrfjprog.exe Specification?

Is there any kind of specification for how nrfjprog.exe works? I would like to write an OSX equivalent.

Thanks,

Chris

361
views
2
1

## How to reconnect after disconnecting via iOS app?

I'm using the example ble_app_hrs along with the HRM part of the nRF Toolbox iOS app. It makes sense to handle this in on_ble_evt in main.c but am unclear how I can recover from enter system mode off ... (more)

202
views
1
vote
1

## Pstorage understanding memory utilization

Hi, Merry Christmas!

I have a question about pstorage_store. Actually, I want to store some data in the memory. Each piece of data has its own size (between 1 byte to 4 bytes) . In total, I need 52 bytes for ... (more)

720
views
no
2

## UART over BLE exemple without softdevice

Hi support !

In my current application, I use nRF24L01+. I want to change this nRF24L01+ for a nRF51422 to add BLE connectivity. So, I've started my development with the spi_slave_pca10028 to check my spi connection. It's OK. Then ... (more)

1k
views
no
1

## Pwm and softdevice on nRF51822

Hello,

I know that this question was here before, but I've read all of the questions and answers and still I don't know what I do wrong.

I'm using 3 PWM channels to controll RGB led, and ... (more)

1k
views
no
1

## nRF51822 Beacon v1.1.0 and nRF Toolbox DFU CRC error

Hi,

I've followed the steps mentioned in this thread https://devzone.nordicsemi.com/questi... and everything seemed to work fine. I've successfully uploaded "nrf51822_beacon_app.hex" file copied from C:\Nordic Semiconductor\nRF51822 Beacon v1.1.0\Precompiled hex ... (more)

1k
views
2
2

## pstorage and flash_manager(in BLE libraries)

i had used flash manager that is in BLE libraries to store datas for persistent storage. but it seems can't work after i enable the softdevice. so i try to use pstorage, i would like to know is pstorage ... (more)

389
views
2
1

## nRF51822 w/s110 7.1.0 supports revision 2 or no? [closed]

In the changelog for 7.1.0 is says:

"This version deprecates all previous 7.x.x versions"

But in the compatibility matrix, it seems like 7.1.0 is only supported by revision 3 chips, and SDK 7.1 ... (more)

154
views
no
no

## nrf51-dk problem with Master Control Panel [closed]

Hi everyone,

I have a nrf51-dk. I am running Master Control Panel app on my win7 computer. However, I cannot see my nrf51-dk in discovered devices section. Log says, Loading...,No response from master emulator,SERVER:Server has started.

When ... (more)

307
views
no
1

## Write Long - How to know which attribute

I'm using SDK 7.1, PCA10028 eval board, SD110 7.1, MCP 3.6.0.8331

I have 2 characteristics, and both are 32 bytes long. When I try a "Write Long" from the MCP a BLE_EVT_USER_MEM_REQUEST is generated ... (more)

28
views
no
no

## unsupported setup status code

I am sending setup commands to a NRF8001 D device and I receive a command response with status of 0x89. This appears to respond to ACI_STATUS_ERROR_UNSUPPORTED_FORMAT. I cannot find any further description of this error which will help me resolve ... (more)

#### Statistics

• Total users: 24915
• Latest user: Wilbur Calhoun
• Resolved questions: 10673
• Total questions: 26111

## Recent blog posts

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• ### Multiple channels in RTT

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• ### 6 Things to Know about Bluetooth Beacons

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• ### Creating a Keil project for a Bluetooth Mesh example (Updated for 0.10.0)

Posted 2017-09-19 12:08:11 by Kristian Skordal
• ### Using millis() like in Arduino.

Posted 2017-09-18 11:58:04 by schef

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• ### BLE App UART PCA10056

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• ### uart_rx disable

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