# 6,728 questions

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## nRF24L01+ Evaluation Kit Incoming Data Verification

Hi,

I am using the nRF24L01+ evaluation kit in a project. Through the EV KIT software I am able to configure the nRF module in receiver mode. I can even see LED 2 light up when it is receiving packets ... (more)

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## mbed with custom pcb

Hey,

For my project I wrote and tested (w/ nRF51 DK) all firmware in mbed. I also made a custom PCB w/ the nRF51822 CEAA chip based on the 4 layer reference design provided by Nordic.

The problem comes when ... (more)

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## Watch variables in Keil <not in scope>

I often see that I cannot 'watch' variables in the watch window, and they just show as <not in scope> - even when I am stepping through a function and actually working with them. Is there any reason for this? Perhaps ... (more)

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## Can I only use modules based on revision 3 nRF51822 with nRF51-DK ??

I guess and hope not but I am a little confused by the compatibility matrix..

I would need to use SDK 7 or higher for my nRF51-DK but I would need to use SDK6.1 or lower to work with ... (more)

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## s110 and s120 message event

Hello! I trying to send message from peripheral to central. On peripheral characteristics are changes with delay. To change characteristics I use this function:

void send_char_data(char *data, char size)
{
ble_gattc_write_params_t write_params;
uint32_t            err_code;

write_params.write_op = BLE_GATT_OP_WRITE_CMD;
write_params.handle   = m_char_handles ...
(more)

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## Connection loss on self made board.

Hi. I am haveing trouble with the SD looseing connection to phone/ipad when I enable a power converter placed closed by. When I sniff the communication with the phone I can see that the NRF stops awnsering the packets ... (more)

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## which example should be used to detect the nRF51 dongle?

Im using the PCA10031. Placed it in the my laptop usb and installed the nRF go and keil mdk arm and nrf51 sdk. Using the pack installer, which example should I use to be able and detect ble device using ... (more)

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## Problem with Long write/Queued write charecteristics

Hi devzone... My setup is nrf51422 dk with soft-device S110 on the server side and on the client side i am running MCP 3.8.0 on a PC using usb dongle. I am using Queued write feature, as my ... (more)

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## Are BLE health related profiles continua compliant?

The Health Device Profile is continua compliant. Are BLE health related profiles like Heart rate profile, thermometer profile continua compliant as well? Do these profiles follow the IEEE 11073 standard? Some customers are asking whether certain medical devices are continua compliant.

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## Zip file format for DFU on iOS nRF Toolbox

I am having some trouble sending DFU to my development board through the iOS app.

When I prepare a zip file for the nRFToolbox app, I include the .dat and .bin files in a zip file. I transfer this zip ... (more)

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## nRF51822 - IO Impedance

Hi,

I'm using the following TI IC http://www.ti.com/product/tps62736 to get 3V from a LiPo battery. It has a VIN_OK pin that I can configure to alert of battery low level. The problem is that ... (more)

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## Most recent, fully functional, GCC example code?

Hi,

I am trying to get even a basic ARM GCC example set up using the provided toolchain code, and am having a rough go at it.

First, what is the most recent, working, full example of how to set ... (more)

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## how to modify uart example from S110 to S310 softdevice?

Hello,

I am trying to modify the ble_app_uart example from the S110 to the s310 softdevice. I am using the project from nRF51_SDK_8.0.0_5fc2c3a.

I modified the Paths from s110 to S310.

I modifed the ram and rom settings ... (more)

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## Need help with implementating s110 and s120 pair of devices

Hi,

I am a little confuse at the moment and wondering if anyone would have any insight on the matter.

I am making a pair of device with s110 and s120. So the s120 will scan and the s110 will ... (more)

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## IoT_SDK_step_by_step.pdf with Raspberry Pi Kernel version 3.18

Hi, I am following the tutorial using Raspberry Pi Kernel version 3.18, but after the step 7, the raspberry gets frozen with the colorful image in the beginning of the boot process. Any idea ? Thanks

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## Migrating to S110 v8

In the s110_nrf51_8.0.0_migration-document.pdf, the ROM and RAM start and size for the v7.0.0 and v8.0.0 are specified as follows

1. s110_nrf51_8.0.0 IROM1 - Start - 0x18000 Size - 0x28000 IRAM1 - Start - 0x20002000 Size - 0x2000

2. s110_nrf51822_7 ...

(more)

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## Integrated Modules with nRF51822/nRF51422 (32kB RAM version)

Hi,

I'm interested in 256kB Flash / 32kB RAM version of nRF51822 or nRF51422 (chip variant: QFAC/CFAC). There is a fully integrated 3rd party module (like the BL600 that we are currently using) with this specification? The module must ... (more)

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## Problems using the DFU OTA - Last iOS update not working

Hi,

Through this post I got an updated bootloader for the nRF51822 128Kb chip version:

https://devzone.nordicsemi.com/questi...

After the last update of the iOS nRF Toolboox Version 1.8, the bootloader is not working any more. Could ... (more)

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## Master Control Panel and nRF51 DK - no response from master emulator

Hi,

I have the same problems as described in https://devzone.nordicsemi.com/questi...

I'll post details here as requested. I do the following:

-Connect P0.30 to ground (see photo below)

-Connect the nrf51 DDK to the PC ... (more)

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## Matching Baluns for a nRF51822-QFAC rev3

For a new product design with the nRF51822-QFAC rev3, could you give me the matching baluns ? Just the Johanson ?

Presently Stmicroelectronics told me that the BALF-NRF01E3 is best but for the QFAC rev3 some performances are degraded.. Why this Balun ... (more)

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## beacon? Ble? Why do this connection?

According to the following sources.

UUID, Mayjor, Minor is set in the advertising_init(). but UUID, Mayjor, Minor is deleted in the advertising_update()

so, I thought that this device will not connect. but device is connected with SmartPhone ... (more)

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Hi,

I just started on developing on the nrf51-DK. I started with blue_app_proximity, and I am trying to hack the immediate alert to do a toggle a led. I initialize the GPIO, and test the method works, I put nrf_gpio_pin_toggle ... (more)

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## button_event_handler not working properly?

• Custom Board which has NordicSemi nRF51822-QFAA (QFAAH0, Rev. 3) MCU,

The board follows the internal LDO setup.

(Ref. nRF51822_PS v3.1 Section 11.3.1)

(more)

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## Adding Characteristic User Description 0x2901,0x2902

Hi Team,

I am trying to implement Blugiga's cable replacement service in Nordic chip. I have successfully changed required UUIDs for services and characteristics please refer it here

Now unable to do following:

1) Adding Characteristic User Description 0x2901 ... (more)

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## SDK 7.2 Hangs on Flash Write, Flash Read works

I've followed this for assistance, but I'm stuck: https://devzone.nordicsemi.com/question/17846/nonvolatile-memory-access/

I can read from flash, but I can't write to flash. Let me layout what I do first:

S130 SDK 7.2 ... (more)

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## Can we expect the S130 to support multiple Slave connections?

Hello,

according to the BLE 4.1 spec, a device can be able to be slave in multiple piconets at the same time. Will this ever work with the S130? I do not know how the standard thinks this is ... (more)

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## s130 pstorage problem

Hi,

I am trying to save/restore some configuration variables to/from the flash storage. If I do it using S110, it works perfectly fine and I can both store and read values. When I use S130 (using the example ... (more)

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## dfu programmer zip file format

Hi, Nordic Enginner:

Now i want to use a external mcu to programe the nrf51822 by signal bank hci dfu mode(BLE DFU,we do not need! ). Also we have a pc softawre for control dfu procedure at backgrund. Now ... (more)

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Hi all,

Can I update the value passed to the sd_ble_gap_adv_data_set() to do a scan response at any time?

For example when I get an interrupt from a button, can I update the value of the data of the scan ... (more)

33
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## Asynchronous mode of timers

Hello.

I need to count impulses going to nrf51822 in low power mode. I use the following code to configure GPIOTE and PPI to toggle counter and it works well:

# define TIMER NRF_TIMER1

void ... (more)

#### Statistics

• Total users: 4690
• Latest user: Burhan
• Resolved questions: 3198
• Total questions: 6728

## Recent blog posts

• ### nRF51822 mbug ecosystem

Posted 2015-04-17 00:17:12 by Joel
• ### Bluz, a cloud connected Bluetooth LE development kit based on the nRF51822, is live on Kickstarter

Posted 2015-04-15 17:25:56 by eric ely
• ### nRF51 current consumption for common scenarios

Posted 2015-04-14 15:39:47 by Stefan Birnir Sverrisson
• ### Building kernel for RPi2 with bluetooth_6lowpan for Raspbian

Posted 2015-04-09 17:06:37 by Håkon Alseth
• ### Accessing the BLE mesh via the spark.io cloud

Posted 2015-04-01 14:03:22 by Nils Montenegro

## Recent questions

• ### nRF24L01+ Evaluation Kit Incoming Data Verification

Posted 2015-04-25 23:41:26 by Burhan
• ### s110 and s120 message event

Posted 2015-04-25 11:54:52 by bishop
• ### Connection loss on self made board.

Posted 2015-04-25 11:00:01 by victor
• ### which example should be used to detect the nRF51 dongle?

Posted 2015-04-25 10:58:21 by erez
• ### Problem with Long write/Queued write charecteristics

Posted 2015-04-25 10:19:26 by yafis