# 23,817 questions

640
views
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1

## ANT HRS demo using UART RX

Hi,

I add UART support using IRQ on the "ant_hrm_tx" example code.

and I'm sending packet of 4 bytes that contains: Delimiter,HeartRate,Battery,Delimiter

the frame is very basic and send every 1000ms from another MCU.

the problem ... (more)

932
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2
1

## Strange beahaviour with size of 'manufacturer data'

I was unaware that the 'manufacturer data' in the advertising packets is limited to less than a full payload. However, whenever I set it to >6 the program "crashes".


#define MANUFACTURER_DATA_LEN                7
...

adv_manuf_data_data ...
(more)

423
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no
1

## App stop working after breakpoint for code analysis

Dear Nordic Developer Zone,

Since I have implemented a timer with interrupt in my application, the debug mode if the Keil IDE stops working when I try to restart the code execution after a breakpoint for code analysis.

I am ... (more)

3k
views
6
1

## RTC0, RTC1 and the app_timer with SoftDevice

Hi all,

I'm a bit confused. After going through available documentation, I thought I had understood that RTC0 was used by the SoftDevice, but that RTC1 was available to use how I liked. After going through the ble_app_template example ... (more)

1k
views
1
vote
1

## Using the "brown-out" detection feature in the nRF51?

Is there an example on how to set up the low-power detection to provide an interrupt to the CPU?

1k
views
4
3

## How to translate the result from register RSSISAMPLE to the real RSSI ?

Hi, Thank you for your kindly help.

I have get the result from the register RSSISAMPLE. The result I get from RSSISAMPLE is like this:0x00000050. As you known, the result should be a negative number. So there must be ... (more)

1k
views
no
1

## Why service discovery command of BLE takes a lot of time?

Hi, I am trying to test my UART using some simple loopback test, and I have noticed that the service discovery command of BLE will occupy the CPU a quite long time. I am just wondering if there is any ... (more)

1k
views
1
vote
1

## More efficient way to change 'manufacturer data' in advertising packet?

Is it possible through the API/Softdevice to do one of the following:

• read out the current advertising data structure, change a the manufacturing data field, and write back; or

• only change the manufacturing data field directly

Currently I'm ... (more)

742
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1
vote
4

## nRF8002 possible to broadcast indefinitely?

Hi, I am planning to use modules with nRF8002 in an indoor positioning application. The mobile devices that are to be located are continuously scanning for BLE devices and detect the module's advertisements. They do not actively connect, just ... (more)

229
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no
1

## Fun Game project : 2.4 Ghz RF / nRF24LU1 feasability ?

Hi, we would like to create a kind of game using 2.4Ghz emitters . The 2.4Ghz USB Dongle emits and the mobile phone detects the frequency + embed unique ID/code so we confirm if the person has been there ... (more)

725
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no
1

## the heart rate monitor demo

I'm a green hand HW Engineer.

I'm trying to compile, program, and run The Heart rate monitor demo though following the step in nRF51822_DK_User_Guide_v1.0.pdf .

First of all, I confirm that the hardware, wire jumper, and SEGGER ... (more)

3k
views
2
3

## Setting a PASSKEY

Hello! I am trying to develop on the nRF51822 eval board as called PCA10001. The programming interface I use is uVision4 on win7.

I would set a static PASSKEY for the pairing process in the reference code "ble_app_hrs". I add ... (more)

489
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no
1

## Heart Rate Service hangs while debugging with eclipse on nRF51822 dev kit

Hi,

I set up eclipse according to n-AN29 and imported several of the example projects. The blinky_example project described in the nRF51822 dev kit user's guide works perfectly (I get blinking LEDs). When I try to use the heart ... (more)

885
views
5
2

## Internal Temperature Sensor Details

I am looking for details on the internal temperature sensor on the nRF51822. I would like to use it to get a general ambient reading of the air around the device. Basically, I need to know if this temp sensor ... (more)

841
views
no
3

## why are the random addresses the some?

hi everyone.now i am developing a project with nrf51822.i am using the PCA10000 dongle to see some information of advertising packages. i moved out and pluged in the PCA10001 many times,but the random address are the some ... (more)

259
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no
1

## Dose the SOFTDEVICE set the NRF51822 to be BLE_GAP_ROLE_PERIPH by default?

and can user change it?or the hardware does not support BLE_GAP_ROLE_CENTRAL?

393
views
no
1

## what kind of GAP Address type does BLE_HRS demo use?

i searched many many times,and i can get the anser.what kind of GAP Address type does BLE_HRS demo use.can someone tell me?tks!

581
views
1
vote
1

## Problem using multiple GPIOTE users

I tried changing the define below from 1 to 2, so I could have one handler for a button and a different handler for other sensors. But my problem is: 1. If I set it to 1, the button handler ... (more)

2k
views
no
7

I get following message when I try to program with the Blinky project a nrf51822 chip: "Error - flash download failed - Cortex M0.

What is wrong?

10k
views
9
2

## What's the maximum of baud rate supported of UART? [closed]

Hi, I have been trying to maximize the baud rate of my uart module, I am using the app_uart layer to control the uart and I have noticed that in your implementation of HCI you have set the baud rate ... (more)

298
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no
2

## nRF24L01P substitution

Hello,

I've developed a circuit with Mikroelektronika's nRF T click module. This module uses nRF24L01P but as I see I cannot order it because it is obsolete.

Should I use nRF24E1 or nRF24Z1 instead of it? In our ... (more)

3k
views
4
4

## S110 - Sending multiple notifications per connection event

Hello,

1) I want to send multiple notifications (from same characteristic), is that allowed by S110 softdevice?

2) What is the maximum number of packets that S110 could process per ... (more)

1k
views
2
2

## What could make BLE sample applications not work, but radio works ok?

Hi, got an interesting problem, this is on a custom board with nRF51822 QFAB that we are bringing up. The radio test (not using softdevice) works ok and produces strong transmit signal (as strong or even stronger than from the ... (more)

567
views
1
vote
2

## Which protocol for low latency, low power, high rate motion tracking application?

Hi

my application is a 9-axis battery driven motion sensor with a data rate about 144 bit per packet at 1000Hz i have to transmit over air. Low latency (<10ms) is extremely important. The device must consume as low power ... (more)

370
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no
1

## nRF8002 forcing to sleep

I have an ultra low power application that needs to broadcast it's proximity on a 1sec interval. However, about 75% of the day I would like the device to be powered down and not transmitting.. This should be controlled ... (more)

738
views
1
vote
1

## Does the SoftDevice S110 support 'Direct Advertising'?

I'd like to use 'Direct Advertising' to get the attention of a Central (a specific one or any in range) when an event happens on the peripheral. Is this mode supported by the device / S110? If so, is there ... (more)

4k
views
10
1

## Bonding - difference between IRK and address in whitelist [closed]

Why some devices makes just an IRK entry in Whitelist of SDK and other put the address into? Is it possible to config which entry should be done?

2k
views
2
3

## RAM Banks (RAM retention)

How are the four RAM banks divided up in the nRF51822? Is it an even split of the 16K total RAM (i.e. 4K per block)?

Furthermore, can I expect strange results if I turn on RAM-retention for the 8K ... (more)

832
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no
1

## Modify clock in gazell on nRF51822

Hello, sirs.

My question is how to configure clock in gazell protocol on nRF51822

I look at the example gzp_dynamic_pairing but that does not have a code part of modifying clock.

I know defining SystemCoreClock on "system_nrf51.c" and i ... (more)

14k
views
2
12

## Keil toolchain/compiler configurations incorrect

Hi all

My target board is nRF51822, and I want to run the heart rate demo project, but a error message when I compile it :

[b]Build target 'nrf51822_xxaa_s110 (256K)' assembling arm_startup_nrf51.s... arm_startup_nrf51.s: error: A3903U: Argument '--pd' not ... (more)

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