# 27,747 questions

647
views
no
1

Is there anyway to limit the number of channels a device is advertising on?

I'm using an nrf51822 with the S110 stack and want to limit my device to a single advertising channel (just 37, instead of 37, 38 ... (more)

683
views
no
7

## Compatibility table for nRF51422

Is there any compatibility table for nRF51 series chips with revisions, softdevice versions and SDK versions?

I have some custom boards with a module that contains a nRF51422 CEAA A0 (0x0031) and although I can reprogram the softdevice downloading the ... (more)

269
views
no
1

## can not creat my own characteristic

HI ALL i have successfully creat my own service referring to the example ble_app_lbs and reference nAN-36. but when i tried to creat my own characteristic in my service, it did not wrok(the device became unable to advertise, and ... (more)

898
views
no
2

I posted this on the Keil website, but got no answers! I would like to use one of my ULINK 2 pods to develop my application. However the Keil interface defines a reset connection. As we all know, the nRF51822 ... (more)

509
views
no
2

## How to send LL_CONNECTION_PARAM_REQ from slave

Hi,

I want to change the GAP params such as connInterval, slaveLatency, and have some questions:


1.can I call sd_ble_gap_conn_param_update directly or need to send LL_CONNECTION_PARAM_REQ first and wait for the BLE_GAP_EVT_CONN_PARAM_UPDATE event? a. If need to send LL_CONNECTION_PARAM_REQ ... (more)

576
views
no
2

## How to migrate FATFS on nRF51822?

I want to store data more than one page on flash, and modify it very often.

pstorage or Fatfs? and how?

Thank you!

2k
views
no
2

## nrf51822 low voltage mode, can't program part

Attached is the schematic of my part configured for low voltage mode.
Very close to page 62 in the nRF51822 product specification document. I am externally feeding 1.8V to the nRF_VDD18 rail. (the 1.8V rail is clean)

I ... (more)

1k
views
no
1

## Can you use two GPIOTE channels for the same pin?

I'm trying to output a relatively high frequency PWM (300kHz). I'll need to adjust the duty cycle on the fly, without glitches and minimal time spent in IRQ handlers.

Currently, I have 2 compare matches setup on a ... (more)

495
views
no
1

## Do I need VID/PID for BTLE HID?

Hey all,

I've created HIDs using USB before which require a vendor ID (VID) and product ID (PID). Are these necessary when creating a device that uses HID over BTLE? If so, can Nordic provide an ID pair?

=]

198
views
no
1

## nRF51822 custom board stop transmitting after a while

Hi,

I am using a custom board with nRF51822 to transmit data. Everything works fine except the transmitting always stop after a while. I am using softdevice 5.2.1. I attach the log file from the Master Control Panel ... (more)

192
views
no
no

I need to create timeout below 1ms. I would pretty much like to use timer for that because I do not want to hold the cpu inside cycle. For me it is not important the exactness of the time but ... (more)

209
views
no
1

## make: *** [_build/app_timer.o] Error 1 (and SDK 4.4.2 vs 5.2)

I'm trying to build the ble_app_hrs example from Nordic's SDK on a Mac OSX 10.9.2 and have been following Nordic's nAN-29 Note v1.1 to install required tools, while looking for edits to make the ... (more)

416
views
1
vote
2

I'm assessing whether ANT is suitable for the network deployment I have in mind, and I would appreciate to hear any thoughts you have on this.

I have a network of say 20 nRF51422 nodes. On a regular basis ... (more)

751
views
1
vote
2

Hi,

I need help on calculating the current consumption of our device when it is in advertise mode. So please answer the below questions.

What are all the significant parameters decides the current consumption on advertise?

Will maximum transmission power ... (more)

3k
views
no
4

## Capture timer value

Hi,

i want to start timer 2 and read its value just before the radio gets active. I've seen in the nr51 series reference manual i can use task capture to set the current count value in CC register ... (more)

311
views
no
1

## Problems after switching Project to SDK 5.2.0

Hello, I'm trying to get my nrf51822 project from SDK 5.0.0 running in the latest SDK 5.2.0. To minimize problems with KEIL I used the template project and copied my sources into this. After some ... (more)

885
views
4
1

## I2C bus with no external pull up

Hi,

We are using nRF51422 in our project and we observe a strange thing, that even there is no external pull up resistors, the I2C communication using the built-in TWI port is still working fine, I would like to check ... (more)

288
views
no
1

## Can I use ADC for voltage comparator ？

We need func of voltage comparator in our project ,can I just use ADC to achieve this？

382
views
1
vote
1

## SoftDevice API header files vs. nrf51 SDK version

Been studying the S110 5.x -> 6.0 migration docs. Are there any project-specifics / include-paths / Keil build-settings that must be updated as well?

Do I understand it correctly that latest v5.2.0 that ends up here is for the ... (more)

187
views
no
1

## How to get BLE SD free/used memory?

Hi, is there a function that returns free or used memory of the BLE SD? I'd like to know how much memory is allocated for added service and characteristic and make a guess how many services and chars I ... (more)

225
views
no
3

## Gazell protocols on the nrf51422?

I am wnating to clarify, if i can use the Gazell protocols on the nrf51422? I can't find it in the SDK for the 51422, but it is in the sdk for the 51822.

161
views
no
1

## Nordic Tech Tour 2014 Eindhoven

Hello,

I am thinking about going to eindhoven the 20th of may for the nordic tech tour presentation. My main interrest is the new v7.0 S110 softdevice which is to be released in may and the NRF51822 newest hardware ... (more)

803
views
no
8

## How to test BLE keyboard on iOS7?

Hi all,

I noticed that there are some instructions for testing keyboard on win8.1 or USB dongle. Can I test it on my iPhone5s which is iOS7.0.4 now?

Regards, Aaron

233
views
1
vote
no

## nrftoolbox dfu application error

Hi, While testing the device firmware update through the nRFtoolbox android application, i get "device has no required service" error more frequently.

2k
views
no
1

## How to program a softdevice with Keil uVision?

Attempting to program a softdevice hex file using Keil uVision and an ST-Link V2, I get:

No Algorithm found for: 10001000H - 10001013H

This is in the UICR (User Information Configuration Registers), which should be programmable like code according to the ... (more)

541
views
no
3

Hi, If i am running 2Mb radio channels, how many can i have operating in the 2.4Ghz space concurrently?

ALso, what mechanisms can be employed to detect and move frequency if there is interference on your channel in an ... (more)

6k
views
4
7

Hi,

I'm confused with the functions (sd_power_mode_set and sd_app_event_wait). 1.I think there are described with the same function.I can't tell the difference between this two.And I can't find the function that is used to ... (more)

479
views
no
1

## Is it possible to use the UART without the Soft Device?

There are some include dependencies that go like this:

app_uart.h -> app_util.h -> app_error.h -> nrf_error.h

and nrf_error.h is under Include/s110.

In order to debug some stuff happening with my UART peripherals, I'd like to do ... (more)

894
views
1
vote
1

## Single vs Dual Bank Bootloader

Can someone explain the reasons/benefits of using the single vs dual bank BLE boot loader?

Actually, why isn't there a single bank BLE bootloader in the example project in SDK 4.4.2? Is there one added in ... (more)

136
views
1
vote
1

## Dynamic connecting to the nearest central

Hello, i would like to make device which will be dynamically change connection with centrals. It should be connected to the nereast device (with the most power). So I will have several paired centrals. I suppose as perepheral my device ... (more)

#### Statistics

• Total users: 25634
• Latest user: Barry Gardner
• Resolved questions: 11245
• Total questions: 27747

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## Recent questions

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