RSS
Sort by » date activity ▼ answers views votes

2,122 questions

5
views
no
votes
no
answers
Last activity 2017-01-18 05:26:40 +0200 by cauzsh

Is there some relations between Gpio17 and ble advertisement on nRF51822?

Hi there: I found a strange phonomenon about consumption betweeen advtisement and gpio17 of 51822. When I start ble adv while setting gpio17 to input disconnected mode with no_pull, the min consumption can be less than 5uA, but when I ... (more)

27
views
no
votes
no
answers
Last activity 2017-01-18 05:09:08 +0200 by Daniel T. Lee

BLE400 compatible with PCA 10028?

I'm trying to following example of nRF51_SDK_v12 OTA-DFU Example, but there are no support with BLE400 at all. (BLE 400 has nrf51822 QFACA1 1536EK Chip on it)

I think this board is pretty similar to PCA10028 DK Board, But ... (more)

5
views
-1
votes
no
answers
Last activity 2017-01-18 05:05:09 +0200 by Danae Oldham flag of Italy

The Quintessential Guide to Home Businesses

<img src="http://media4.picsearch.com/is?5ZTq5PDuXnmuAQt3hrEfezH5I2nJjn-h1_VbSocFdAk&height=130" alt="internet marketing association india" title="internet marketing association india (c) gerrardindiabazaar.com" style="max-width:400px;float:left;padding:10px 10px 10px 0px;border:0px;">If you'd like to ... (more)

5
views
no
votes
no
answers
Last activity 2017-01-18 01:16:55 +0200 by Spectre

How to hope frequency after send Ack in ESB

Hi, I use a nRF52832 on pca10040 with s132 as RX and an arduino uno with a nRF2401L+ as TX

The nRF52 is a BLE NUS peripheral and can receive ESB packet with timeslot like this

The nRF24 send ESB ... (more)

20
views
no
votes
no
answers
Last activity 2017-01-18 00:37:17 +0200 by Pranav Sanghadia

nRF52840 pricing and availability

I am not sure if this is the right forum to ask this question but I can't find details on availability and pricing for nRF52840. I tried calling DigiKey but they don't have this part in their inventory ... (more)

15
views
no
votes
no
answers
Last activity 2017-01-17 23:57:23 +0200 by wecare

How to use nRF52832 Dev kit for Bluetooth 5?

Is it possible to use Bluetooth 5 for nRF52832 chip? if so, how can I use nRF52832 on Bluetooth 5?

Any tutorial available ?

15
views
no
votes
no
answers
Last activity 2017-01-17 20:18:57 +0200 by SRA

Schedular vs RTOS vs Blocking, need scheduler clarification.

I have a project coming up that uses:

  • BLE Softdevice, a fair amount of GATT data
  • SPIM with a fairly high data rate, slave has a RDYN (data ready now) IO to the rnf52
  • UART
  • some application subfunctions that need ...
(more)

18
views
no
votes
no
answers
Last activity 2017-01-17 18:00:40 +0200 by Collin Moore flag of United States

How to check for pending interrupts before calling sd_app_evt_wait?

Hi. I am having trouble getting the sd_app_evt_wait() call to work correctly in my code. My main program works like this:

<inits>
for(;;)
{
   <read saadc>
   <sd_app_evt_wait> // app_timer should make this return in 10 seconds
}

I have an app_timer that causes ... (more)

18
views
no
votes
no
answers
Last activity 2017-01-17 17:08:07 +0200 by User1321

High Fequency UART transmissions

I am using the nrf52832 with its Development kit to transmit trough UART to the PC a frame with 26 bytes, I have configured the port to 1MBoudRate. Once I prepare the frame I use the next instructions to transmit ... (more)

16
views
no
votes
no
answers
Last activity 2017-01-17 16:10:18 +0100 by Ankush

Code getting restarted after getting error as FR_DISK_ERR

Hi,

I am working on interfacing SD card with nrf52. I am sampling SAADC at 1000 sps and trying to write over SD card as well as sending over BLE. Both operations are working fine but after FR_DISK_ERR , entire code ... (more)

12
views
no
votes
no
answers
Last activity 2017-01-17 15:28:24 +0200 by dblasco

LPCOMP Reference Selection

Hi everyone,

I am using LPCOMP in rFF58122. When coosing the reference voltage, I have to fill the structure nrf_drv_lpcomp_config_t with the hal nrf_lpcomp_config_t that includes the reference voltage (nrf_lpcomp_ref_t).

This nrf_lpcomp_ref_t (in nrf_lpcomp.h) may be from 1_8 to ... (more)

13
views
no
votes
no
answers
Last activity 2017-01-17 14:17:05 +0200 by NK99

Quadrature decoder with redbear ble nano

Help!! I need to implement a dc motor position control and i have problem reading the encoder (too fast). I have seen that nrf51822 has a qdec peripheral. Any suggestions how to use it with ble nano? Also any suggestions ... (more)

26
views
no
votes
no
answers
Last activity 2017-01-17 12:07:42 +0200 by kibo

How to start application without DFU

Hi,

SDK version : 11.0 Softdevice : 0x88 DK : nrf52832

I merged Softdevice.hex, application.hex and bootloader.hex into one hex file, and uploaded this file to my Development kit.

When I turn on the DK, the DK is booted ... (more)

14
views
no
votes
no
answers
Last activity 2017-01-17 11:00:05 +0100 by Prashant H

Device get reset during autoconnection but very rarely

I am using S130, nRF51822, SDK v11.0. Device is configured as when it gets disconnect from app, device goes into advertising mode for unlimited time. When any mobile app autoconnect it, device stops advertising and goes into connected mode ... (more)

8
views
no
votes
no
answers
Last activity 2017-01-17 08:54:14 +0200 by littlebei

warnings during linking: undefined symbol fs_data$$Base and fs_data$$Limit

I was just working with the ble_app_uart example in nrf5_SDK_12.2.0. Minor modification were done to the main function. The build output:

linking... ._build\nrf52832_xxaa.axf: Warning: L6330W: Undefined symbol fs_data$$Base (referred from fstorage.o). Unused section has ... (more)

22
views
no
votes
no
answers
Last activity 2017-01-17 05:48:00 +0200 by sid

RE: GATT profile : value updation

Hi,

We are working with the nrf51822 on mBed platform

We have created the following profile under deviceinformationservices

in main.c

uint8_t DataCounter = 100;

in void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)

  deviceInfo = new DeviceInformationService(ble, "ARM", "Model1", "SN1", "hw-rev1", "fw-rev1", "soft-rev1 ...
(more)

19
views
no
votes
no
answers
Last activity 2017-01-17 00:47:02 +0200 by Cory Mast

Reducing TWI Active Current

Hello,

I am currently working on an ultra-low power project that requires reading an I2C accelerometer multiple times per second. After analyzing the current consumption in the design, it is clear that the TWI peripheral uses quite a bit of ... (more)

35
views
no
votes
no
answers
Last activity 2017-01-16 23:20:50 +0200 by Esteban Gutiérrez

Problem with nrfjprog and SEGGER JLink v6.12f

This is no a question, but i was not sure where to post it.

I was trying to use the nrfjprog command with the new version of SEGGER JLink, but the terminal output was "Violacion de segmento", in English something ... (more)

8
views
no
votes
no
answers
Last activity 2017-01-16 23:05:32 +0100 by mpm@mendeltron.com

I2C with Softdevice nrf_drv_twi_enable hangs

Using SDK 12.1.0

I2C with SoftDevice works on PCA10040 Eval Board with nRF52832 but hangs in the nrf_drv_twi_enable function with TY module EBSGCNZWY which is an nRF51822 version F1. Running without the SoftDevice on the TY module, the ... (more)

41
views
no
votes
no
answers
Last activity 2017-01-16 19:25:16 +0200 by mikster

disable logging

I want to disable logging (which is working OK). In my app.config.h I have set the following:

#undef NRF_LOG_ENABLED
#define NRF_LOG_BACKEND_SERIAL_USES_UART 0
#define NRF_LOG_BACKEND_SERIAL_USES_RTT 1
#define NRF_LOG_DEFAULT_LEVEL 4

Now I get this during linking:

...../../../main.c:130: undefined ...
(more)

14
views
no
votes
no
answers
Last activity 2017-01-16 17:00:17 +0200 by vea45

sd_ble_gap_conn_param_update error 8

I have an application where my nrf52832 acts as a peripheral and I can connect to it without problems, but after some time like aprox 10 minutes when I try to connect to it again it doesn't accept the ... (more)

15
views
no
votes
no
answers
Last activity 2017-01-16 16:18:49 +0100 by etienne

HardFault_handler after _start()-->_memset_from_thumb

Hello folks,

we setup a new Project (eclipse,SKD 12.2.0, S130, NRF51822QFAAH0) based on the sdk examples. But the thing since 2 days we got a error we actually do not understand.... So we have after a HardFault_handler ... (more)

39
views
no
votes
no
answers
Last activity 2017-01-16 14:39:16 +0200 by Nicolas Besson

nrf52 radio and stack crash

I'm developing a device based on an nrf52 chipset, and I'm experiencing strange behaving of the Radio interface. The firmware is based on SDK v11 and SoftDevice 132, the hardware design is close to the reference design. I ... (more)

27
views
no
votes
no
answers
Last activity 2017-01-16 13:29:42 +0200 by VanNuru flag of Germany

Flash-operation problem (because of readback protection?)

In general, I'm working on my own dfu-bootloader project which was developped on the "Engineering A" chip-revision of the nRF52832. We finally have new hardware with the chip-revision 1 and I now have several problems with flashing in general ... (more)

17
views
no
votes
no
answers
Last activity 2017-01-16 12:17:35 +0100 by Matej

Pairing/bonding with ble_app_template example not working for me

Hi,

I just recently got into designing Bluetooth devices and I am experimenting with NRF51822 and BLE400 board. I managed to compile and upload the examples from SDK 11.0.0 to the device with SEGGER Embedded Studio and I ... (more)

12
views
no
votes
no
answers
Last activity 2017-01-16 10:26:23 +0100 by Chaw flag of China

ERROR:Fatal When I add BLE DFU service in my own app

Hi, Nordic

I want to add BLE DFU service in my own app, so that the nRF52 can operate BLE DFU.

I only modify 2 places:

static void services_init(void)    --> init ble_dfu_init_t
static void ble_evt_dispatch(ble_evt_t * p_ble_evt)  -->ble_dfu_on_ble_evt
static void ...
(more)

26
views
1
vote
no
answers
Last activity 2017-01-16 05:42:31 +0200 by benjamin_xo

Why am I having problems driving an RGB LED with PWM from NRF52??!

Hello Nordic Community.

I'm having issues trying to control a simple RGB LED circuit with the NRF52. I have set up 2 timers and PWM instances Red and Green on PWM1 and Blue on PWM2 but it's just ...

(more)

59
views
no
votes
no
answers
Last activity 2017-01-14 11:55:13 +0200 by quentin

question about scanning in ble_app_hrs_rscs_relay which is always disconnected with heart rate monitor?

When i use ble_app_hrs to connect with hrs demo(ble_app_hrs example), everything is ok.But when i connect to a heart rate monitor, it always disconnect.The print information is:

[APPL]: 180d

Heart rate service discovered

Battery = 100 %

Battery = 100 ... (more)

29
views
no
votes
no
answers
Last activity 2017-01-14 08:47:33 +0200 by kygomax

Why the output amplitude decreases when C decrease?

Hello,

I was trying to build Clapp oscillator with a JFET J310 (FYI:link text)as it is shown in the figure. image description

Capacitor C is variable and goes from 20 pF to 285 pF. I have connected C3 in series ... (more)

31
views
no
votes
no
answers
Last activity 2017-01-13 19:53:34 +0200 by Madhuri

SCAN_REQ as ACKNOWLEDGEMENT

Hello all, I am implementing an energy efficient system, in which I am advertising in BLE_GAP_ADV_TYPE_ADV_SCAN_IND mode, I am using scan_req_report as an acknowledgement from a phone(my central device) after which i would like to stop advertising.

I use ... (more)

Statistics

  • Total users: 15767
  • Latest user: Kit Carington
  • Resolved questions: 8218
  • Unanswered questions: 2126
  • Total questions: 19085

User menu

    or sign up

Recent blog posts