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Last activity 2017-10-17 00:16:30 +0200 by Searay

Porting Fastled library to nRF51422

Hi all,

I am developing firmwares for the nRF51422 under Eclipse with the ARM GCC toolchain.

I have a matrix of WS2812 (or neopixel) RGB LEDs that I am controlling using the code available here.

However, I would like to ... (more)

27
views
1
vote
1
answer
Last activity 2017-10-15 04:33:08 +0200 by RK flag of Singapore

Need genral guidance on radio device

I need a cheap 2 or 3 button fob or itag to connect to/control my NRF51 firmware. So far I only could find "AB Shutter 3" as input device with >1 button but it is using Bluetooth V3. I ... (more)

116
views
no
votes
2
answers
Last activity 2017-10-10 13:16:03 +0200 by SørenHN flag of Denmark

Application compiles with no errors but still dosen't work?

I am building a Bluetooth Mesh application based on the Mesh Beacon Example, i have written a custom Makefile and got it compiling with no errors.

But when Flashing the nRF51422 with the program, nothing happens. If I build the ... (more)

22
views
1
vote
1
answer
Last activity 2017-10-02 04:55:57 +0200 by RK flag of Singapore

Compiling for nrF51422 and running on nRF51822

Hi all,

I installed Nordic examples for Keil MDK, and I am able to compile the examples for the PCA10028 board, which is based on the nRF51422. But I intend to take the same code, and run it on a ... (more)

32
views
1
vote
1
answer
Last activity 2017-09-29 09:16:02 +0200 by endnode

How to configure NRF51-DK to flash firmware to a different nrf51 module

Hi all, I have here NRF51-DK, I am a bit familiar with the kit for a while. Now I want to make a system using NRF518422 chip. I manage to find a module - "Taiyo Yuden EYAGJNZXX".

My question is, Is ... (more)

80
views
no
votes
no
answers
Last activity 2017-09-29 03:03:43 +0200 by jj

ble communication in a separate C file

I would like to separate the BLE communication from the main.c and place it to a separate file. I followed the example of the default ble_app_template as well as nordic's services tutorial to create the BLE. It is ... (more)

43
views
no
votes
1
answer
Last activity 2017-09-19 10:56:51 +0200 by Martin Børs-Lind flag of Norway

Low voltage detector on "ble_app_blinky" peripheral

Hello we have a projekt with periperal "ble-app-blinky" und central "ble_app_blinky_c".

how to do:
when the "peripheral" battery is below 2.3V then the led 4 on "central" must going on?

(In the moment we do it with a external ... (more)

39
views
1
vote
1
answer
Last activity 2017-09-19 02:37:41 +0200 by RK flag of Singapore

New to NRF51422

I am developing a product where I need to read a signal from an SPI ADC and send remotely to a receiver. This will be powered of a coin cell. I see that the NRF51422 is low power, but I ... (more)

25
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no
votes
1
answer
Last activity 2017-09-14 10:49:13 +0200 by Petter Myhre flag of Norway

How App switch to bootloader_secure

Hi, I am use nRF51422 and SDK 12.3 sd130. I can use nRFTool App update FW to nRF51422. but I dont know how to switch App to bootloader in BLE not button. which function I can use and reset ... (more)

52
views
no
votes
2
answers
Last activity 2017-09-13 16:57:34 +0200 by Hamza

Error: app.hex in softdevice region

Hello everyone,

I'm currently migrating from a functional code IAR to Eclipse GCC.

It compiles fine and I got the hex files.

However I have some troube to flash the application in the module. Indeed, when I'm using ... (more)

107
views
1
vote
2
answers
Last activity 2017-08-31 15:43:31 +0200 by SørenHN flag of Denmark

Hard Fault when using bluetooth mesh examples

When programming the bluetooth mesh light control demo example found in the bluetooth mesh SDK, i get this error using J-Link RTT Viewer:

0> <t:          0>, main.c,  116, ----- BLE Mesh Light Control Server Demo -----
0> <t:       1391>, main.c ...
(more)

27
views
no
votes
no
answers
Last activity 2017-08-22 18:21:25 +0200 by Ignacio Lopez-Negrete flag of Spain

RTT infinite loop over initial commands

Hi,

I have just updated the SEGGER Jlink tools to the latest version v6.18b.

Under Keil debbuging the J-Link RTT Viewer (or client) shows the initialization commands in an infinite loop (one after the other starting from the first ... (more)

30
views
no
votes
1
answer
Last activity 2017-08-22 08:43:15 +0200 by Bjørn Spockeli flag of Norway

Disable enhanced power control

Hello,

Is there any way to disable the "Enhanced Power Control" feature of the BLE standard? I am working with nRF51-DK in the connection mode and I need fixed transmit power regardless of the distance between my Bluetooth devices. If ... (more)

477
views
2
votes
2
answers
Last activity 2017-08-21 14:03:14 +0200 by jruiz

nRF51 DK soft devices examples not working

Hi,

I have an nRF51 DK, found here https://www.nordicsemi.com/eng/Produc.... I am using SDK V11.0 and S130 V2.0. I am developing on a Linux machine.

I can compile and run the blinky example successfully ... (more)

134
views
5
votes
1
answer
Last activity 2017-08-16 20:25:40 +0200 by Thomas Stenersen flag of Norway

Mesh SDK 0.9.1 on PCA10028 - Light Control Demo - Hard Fault

Post in reference to link

After flashing light control server or client app on PCA10028 app crashes with HARD FAULT.

Steps how I built the app:

Using freshly downloaded MESH SDK 0.9.1.

ble_mesh_v0.9.1-Alpha>mkdir build
ble_mesh_v0 ...
(more)

96
views
2
votes
1
answer
Last activity 2017-08-14 10:17:03 +0200 by endnode

where can i find nRF51422-QFAA-T PDF DATASHEET

  1. i doing the pcb tiring to find the package size .

  2. also if there is any application note to the pcb Antena

thanks adi

270
views
no
votes
2
answers
Last activity 2017-08-11 12:29:59 +0200 by Jørn flag of Norway

PCB antenna design problem: too short range?

Dear Nordic,

Some time ago we started a project in which we decided to use ANT protocol to communicate wirelessly. However, now that we are going to production in a very very short time, we have spotted a very critical ... (more)

47
views
1
vote
2
answers
Last activity 2017-08-08 19:28:48 +0200 by Nguyen Hoan Hoang flag of Canada

Error while flashing nrf51422

Hello,

I want to falsh nrf51422 device. I ma developing software using Eclipse and SDK_7.2.0. The soft device is 130. I have build the project successfully and Hex/elf file is generated.

But when i tried to flash ... (more)

121
views
no
votes
1
answer
Last activity 2017-08-08 13:55:27 +0200 by khosla

Sniffer not functioning.

ppi.zipHi, I am using radio with ppi to advertize packets as shown in the mainc file attached. Even after allocating the access address of Bluetooth on line 196 as set_address0(0x8E89BED6); and advertizing channel selected as 37 as ... (more)

61
views
1
vote
1
answer
Last activity 2017-08-08 11:10:40 +0200 by Torbjørn Øvrebekk

LSM9DS1 libraries for nRF51

Hi, I have some code written for Arduino that read values in SPI from a LSM9DS1 (9-axis IMU) and I need to make it work on a nRF51.

What I have troubles with is the library to use with the ... (more)

74
views
no
votes
1
answer
Last activity 2017-08-02 09:10:10 +0200 by shadowsky

UART lock up

Hi,

I'm having some trouble using the UART protocol (4800 8N1) communicating with a GPS device.

It happen that the nRF51 device is not getting an interrupt (nothing at all, even not an error) when a NMEA character have ... (more)

88
views
1
vote
1
answer
Last activity 2017-07-31 17:17:59 +0200 by Hung Bui

enable whitelist in advertising SoftDevice S130

Hello, I got problem in enabling whitelist on starting advertising.

My working enviroment is PCA10028 V1.1.0 2015'18, SoftDevice S130 2.0.1, SDK 12.2.0 MCP works on Android 6.0.1, Nexus 7(2013).

I ... (more)

92
views
no
votes
4
answers
Last activity 2017-07-27 04:55:40 +0200 by RK flag of Singapore

What happens if handlers are called at the same time? (nrf51422)

Hi,

I am new to firmware engineering. I have a simple and basic question.

If there's Timer A and B, and both interval is 100ms, what happens to the timeout handler functions? If both timers start at the same ... (more)

74
views
no
votes
no
answers
Last activity 2017-07-26 15:11:16 +0200 by ankitjain96

DAP error while reading AHB-AP Rom Reg. Unable to connect to target.

I am using jlink to program the custom board. I was able to program the board earlier, but now this error is comming. I have rechecked the connection and it is fine. The custom board is powered by the 12V ... (more)

1k
views
4
votes
2
answers
Last activity 2017-07-26 09:22:47 +0200 by Kristin flag of Norway

BLE Software configuration for FCC Spurious Emissions Test

I have a dual mode BLE / ANT+ nRF51422 design going through regulatory testing for FCC / EU marketing approval. I have previously successfully tested a very similar design with Ant+.

One of the tests that I am required to do is ... (more)

84
views
no
votes
no
answers
Last activity 2017-07-24 21:16:37 +0200 by badvassal

UART tx stops due to flow control; requires power cycle

tl;dr: UART transmission sometimes stops and never resumes. Only a power cycle resolves the issue; a system reset is not sufficient. The problem only occurs when flow control is used.

Hardware: nRF51dk 51422, PCA10025, V1.2.0, 2015.51 ... (more)

164
views
no
votes
2
answers
Last activity 2017-07-24 16:22:37 +0200 by Iliyan Iliev flag of Bulgaria

HID Mouse Example - Can't Pair with Windows 10

I want to run the HID Mouse and Keyboard examples on nRF51 Dongle. How I can configure it first, to connect with my PC via Bluetooth and second, to configure the GPIOs act like buttons, since the dongle doesn't ... (more)

31
views
no
votes
no
answers
Last activity 2017-07-22 12:48:29 +0200 by Khan

Different master instances for two slaves in nrf51422

Hi All,

I am using nrf51422, SDK 12.0.0, an SPI OLED display 128x32, and an SD card.

I want to interface an OLED display and an SD card onto the nrf51422. Although my SD card and the OLED ... (more)

122
views
2
votes
2
answers
Last activity 2017-07-22 10:59:35 +0200 by endnode

APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, m_tx_buf, m_length, m_rx_buf, m_length));

Hi All,

I am a beginner,Can you please explain me what is the role of this line?

APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, m_tx_buf, m_length, m_rx_buf, m_length));

38
views
2
votes
1
answer
Last activity 2017-07-20 15:43:15 +0200 by Adrian Lita

nRF51422 radio issues

Dear Nordic,

I have built a board using nRF51422, and I've just manage to populate it and start it up. I'm using a modified example (peripheral_lbs), and everything seems to work ok (leds and buttons), but the radio ... (more)

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