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why Error: L6218E: Undefined symbol app_sched_init (referred from main.o). 0

Hi, I am using Keil IDE to develop nRF51822 project. in main(), the command line APP_SCHED_INIT(APP_SCHED_MAX_EVT_SIZE, APP_SCHED_QUEUE_SIZE); has Error : L6218E...

1484 views

0 replies

Started over 7 years ago
by DYNAMICTOYS
Not Answered
GPIO port input in low power mode 0

Hello, I'm new to the Nordic SDK and I would like to ask you for help with implementation of PORT events for revision < 3 in "low power" mode instead of "high power" mode...
- nrf51822
1225 views

0 replies

Started over 7 years ago
by michael
Not Answered
Central whitelists with peer manager under FreeRTOS 0

Hi Nordic, I've built a ble app with a custom protocol, but am struggling with storing bonds, when running under freeRtos. What I see: central app crashes (hardfault...
- peermanager
- s132
- nrf52832
- central
- sdk13
1062 views

0 replies

Started over 7 years ago
by x_mike
Not Answered

Need help for this captured BLE HID key code? 0

Hello All, I am new to this forum, I have been using nRF51822 for a while, and its a great little BLE chip. I am usinga BLE keyboard to send a key to iphone and I captured...

1250 views

0 replies

Started over 7 years ago
by alikob
Not Answered

COMMUNICATION BETWEEN TWO NRF51X BOARDS 0

I WANT COMMUNICATION BETWEEN A NRF51422 AND NRF528321 BOARDS, IN WHICH IN NRF51422 BOARD I WILL MEASURE PWM COUNT(IT IS PHERIPHERAL) AND SEND IT TO NRF528321 BOARD WHICH IS...

584 views

0 replies

Started over 7 years ago
by ANKITTY

Recent in Nordic blog

External nRF51822 SWD Programming using the nRF51-DK

Mahesh Venkitachalam

I've written up a note on programming external nRF51822 boards (like the RedBearLab Nano) using the SWD interface of the nRF51-DK. http://electronut.in/nrf51-dk-external-programming/
- 9 Jul 2015
Getting started with nRF51822 and GCC - transmitting LDR light levels over BLE

Mahesh Venkitachalam

I've written up a simple project that uses the nRF51-DK to send LDR light levels over BLE using the Nordic UART Service (NUS). In the process, I have set up a cross-platform toolchain (OS X, Windows) using…
- 8 Jul 2015
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- 25 Jun 2015

Latest guides

Bluetooth low energy: Bluetooth Smart and the Nordic's Softdevices - Part 1 GAP Advertising

Hung Bui

This blog series was created as an attempt to fill in the gap between how Bluetooth Smart is defined in the spec and how you can use our APIs and event from our softdevice to do what defined in the spec…
- 10 Dec 2015
nRF5x: Current measurement guide: Introduction

Stian Røed Hafskjold

###Other relevant posts A concise guide to equipment setup, and how to use the development kit for current measurements can be found here: Measuring current with PCA10040 v0.9.0 A post that describes…
- 1 Dec 2015
nRF5x: General PCB design guidelines for nRF51 series

Petter Myhre

When designing a PCB with nRF51, nRF51822 or nRF51422, there are some rules that should be followed in order to get a good working radio/system, with a maximized range. General rule The RF part of the…
- 13 Nov 2015
Software Development Kit: nRF5 SDK Scheduler Tutorial

Einar Thorsrud

2019-02-08: Updated tutorial to cover nRF5 SDK version 15.2. Introduction Scope The following topics will be included in this tutorial: Configuration of the Scheduler library. Using the scheduler with…
- 9 Nov 2015
Bluetooth low energy: Bluetooth low energy central tutorial

Anders Strand

Scope Topics that will be covered include: Before we begin Necessary equipment and software Necessary prior knowledge Setting up the example projects Background theory Central and peripheral roles…
- 4 Nov 2015
Software Development Kit: nRF5 SDK Application Timer Tutorial

Einar Thorsrud

2018-11-23: Updated tutorial to cover SDK version 15.2. 2019-02-08: Improved example project (SDK 15.2) and updated instructions accordingly. Introduction Scope The following topics will be included in…
- 30 Oct 2015