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Last activity 2017-03-26 21:14:24 +0100 by Sri_guy

Program external board using NRF52 DK P20

Hi,

I am have a custom breakout board that uses the NRF52832 chip and I was able to program it using the J-link programmer and seperating ribbon cable to expose the Vtarg, GND, SWDIO and SWDCLK lines.

Now I want ... (more)

12
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no
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no
answers
Last activity 2017-03-26 05:00:43 +0100 by ezgame

Example code for Google Fitness using nRF51/52 DK?

I found out that google fitness support BLE sensor: https://developers.google.com/fit/and...

Does anyone have experience with using nRF52 as Bluetooth sensor for Google Fitness? If so, is there have any existing example code from Nordic SDK ... (more)

54
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no
votes
no
answers
Last activity 2017-03-24 07:23:49 +0100 by pravi

Is it possible NRF52 NUS service and Buttonless DFU service work together like the given example, ble_app_hrs, s132_with_dfu?

Hi,

I was trying to add buttonless DFU service along with NUS service. I used SDK v11. Taken the example ble_app_hrs, s132_with_dfu. And added my existing NUS service. I faced a problem that, both are not working together. If i ... (more)

104
views
2
votes
1
answer
Last activity 2017-03-23 17:23:05 +0100 by erltot

Sharp Memory LCD LS044Q7DH01

Edit: The code posted below works on the 96x96 3V(LS013B4DN04) variant of the display, I still have no idea why it doesn't work on LS044Q7DH01, but I'm guessing it doesnt have much to do with the nordic ... (more)

31
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no
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no
answers
Last activity 2017-03-23 16:08:44 +0100 by raccoon

SWI user flags

Hello to all nordic jedi masters out there!

I am using nRF SDK v11.0 with the nRF52832.

I am a little bit confused about the usage/meaning of the flag argument in the nrf_drv_swi_trigger function.

Is it an arbitrary ... (more)

35
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no
votes
no
answers
Last activity 2017-03-23 14:15:06 +0100 by Jacob

Using JLinkExe to flash nRF52

Hello, Our production systems run on Raspberry Pi, which is running on ARM. Currently the nRF5x command line tools are only available on x86, which means that we need to use JLinkExe directly.

We want to flash SoftDevice, bootloader and ... (more)

369
views
no
votes
3
answers
Last activity 2017-03-23 14:06:12 +0100 by Stein Helge Riise

GPS with nRF52 on i2c

Hi,

I am struggling with the Ublox EVA7M with nRF52 on i2c and wonder if anyone can share a sample code of connecting a GPS to the nRF52. I am unable to make the twi work. I am using the ... (more)

45
views
2
votes
2
answers
Last activity 2017-03-23 11:16:03 +0100 by Frederik

How to place constants at know address?

Hello,

when I was working on MSP430 I used to place the firmware version constant at a known address in flash so that it can be verified which firmware version is flashed without running the application, just by reading the ... (more)

50
views
3
votes
1
answer
Last activity 2017-03-23 09:30:49 +0100 by Sigurd flag of Norway

Do we need to buy MAC addresses for BLE beacons?

Hello.

We are building our project based on nRF52 chip and BLE beacon firmware. Do you know if we need to buy some MAC address range from "provider" or we can code some randomize address in this case? I´m ... (more)

51
views
no
votes
1
answer
Last activity 2017-03-23 08:33:57 +0100 by Kristin flag of Norway

Softdevice halts at location 0x000008C4

Hi There,

We have an issue where our project crashes, but the app_error_fault_handler() callback is not being called to help identify the cause of the issue. We are using the following version of the Softdevice: s132_nrf52_3.0.0_softdevice.hex

Without ... (more)

66
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2
votes
2
answers
Last activity 2017-03-22 19:40:00 +0100 by Sigurd flag of Norway

wierd float64_t vs. float32_t

Hi, I have wierd experience about using float32_t. This is my test:

When i use operations on float64_t i got:

0.0001s   MAIN:INFO:init_finished
0.0001s   MAIN:INFO:loop
0.5077s   MAIN:INFO:loop //timer interrupt
0.4978s   MAIN ...
(more)

47
views
no
votes
1
answer
Last activity 2017-03-22 16:04:15 +0100 by Petter Myhre flag of Norway

Choosing sofdevice for nrf52

Hello,

I have a project that I want to transfer it from nrf51 to nrf52 (the changes are from nrf51822 to nrf52832). I followed the migration guide. And now it debugs so I can check the error statuse. The thing ... (more)

99
views
no
votes
5
answers
Last activity 2017-03-22 13:07:10 +0100 by H4NNE5

nrf52 DK: UART problems

Hello,

I integrated the relevant code from the "uart" example into the "ble_app_uart" example(this is all the code in the main routine):

uint8_t cr;        
uart_init();
    printf("\r\nUART Start!\r\n");

  while (true){

    while (app_uart_get(&cr) != NRF_SUCCESS);
    while (app_uart_put ...
(more)

28
views
no
votes
no
answers
Last activity 2017-03-22 09:37:10 +0100 by dingari

Bootloader doesn't load application on power-on

I have a small problem with my bootloader + application on NRF52832. I'm using SDK 12.2.0 with S132 v3.0.0.

When the device loses power, and power is then re-applied, the bootloader doesn't start the application ... (more)

36
views
1
vote
1
answer
Last activity 2017-03-22 03:33:52 +0100 by Akshay

Programming nRF52 chip using 2 UART pins

hi

I have designed a small PCB with the NRF52 chip on it and kept few ports for some peripherals. Apart from that I only have 4 pins that I can connect to, UART-Tx, UART-Rx, Power and Gnd. I want ... (more)

23
views
1
vote
1
answer
Last activity 2017-03-21 17:53:31 +0100 by endnode

DK: use internal device with external device connected

Hello,

Can I interact with the internal device of the nRF52 DK (PCA10040) while an other nRF52 connected through the P20 (or P19) connector? The JLink tool has a "device" command but I don't known if it can be ... (more)

455
views
3
votes
3
answers
Last activity 2017-03-21 15:14:48 +0100 by Marcel

Programming SoftDevice to custom PCB: Unable to find or open the JLinkARM dll

I've been trying to program a custom PCB with an nRF52832, using the nRF52 Development Kit and nRFgo Studio.

When I connect just the nRF52 Development Kit to my computer and program the SoftDevice (s132_nrf52_3.0.0_softdevice.hex), it ... (more)

38
views
1
vote
1
answer
Last activity 2017-03-21 14:16:23 +0100 by Hung Bui

How to use ble_app_uart_c for custom UUID service?

Hello!

We're using the SDK 12.1 ble_app_uart_c as an example for a nRF52 DK as Central application. Instead of using ble_app_uart example for peripheral device, we created a new custom service based on ble_app_template example for our peripheral ... (more)

26
views
no
votes
no
answers
Last activity 2017-03-21 11:15:52 +0100 by Steve H

LFCLK timer slows to a crawl

I have a program which uses two timers to flash an LED, alternating between flashing once every 5s for 15s, then once every 0.25s for 15s.

If I run this on the nRF52-DK with the external LFCLK, it works ... (more)

83
views
2
votes
1
answer
Last activity 2017-03-21 10:04:29 +0100 by Jørgen Holmefjord flag of Norway

[SDK13.0.0] Please provide complete version of sdk_config.h

I have request similar to this questions but for SDK13:

Judging by quick grep sdk_config.h from ble_app_template advised as 'complete version' here is missing following enable statements:

ANT_BPWR_ENABLED
ANT_BSC_ENABLED ...
(more)

52
views
no
votes
1
answer
Last activity 2017-03-21 09:01:30 +0100 by Kristin flag of Norway

Can the nRF52832 support an HID joystick profile?

Hi:

Looking in both SDK12/13 I cannot see any examples related to an HID Joystick/Gamepad. It looks like somebody asked a similar question here: https://devzone.nordicsemi.com/questi...

I did start to modify the mouse example to ... (more)

40
views
no
votes
2
answers
Last activity 2017-03-20 18:17:23 +0100 by Amigo

NRF52 ESB RX-TX

how to change RX and TX operations ? i wrote next code:

#include "nrf_esb.h"
#include <stdbool.h>
#include <stdint.h>
#include "sdk_common.h"
#include "nrf.h"
#include "nrf_esb_error_codes.h"
#include "nrf_delay.h"
#include "nrf_gpio.h"
#include "nrf_error.h"
#include "nrf_log ...
(more)

31
views
1
vote
1
answer
Last activity 2017-03-20 18:02:03 +0100 by f.salvatore

nRF UART driver initialization

Hello, i'm trying to use nRF UART driver (nrf_drv_uart) to implement a high level UART manager. I followed indications on SDK documentation but it doesn't work and i think that is a problem of initialization.

Configuration: nRF52832 - SDK ... (more)

33
views
no
votes
no
answers
Last activity 2017-03-20 14:12:45 +0100 by Ankush

f_mkfs returns FR_DISK_ERROR

Hi all,

I my application I am interfacing SD card with nrf52 using FATFS file system. I am observing some weird behavior while doing this. I have two SD cards, one of 2GB sandisk and another of 8 GB Transcend ... (more)

24
views
1
vote
1
answer
Last activity 2017-03-20 10:53:30 +0100 by Rokas

How to check the nrf51 -> nrf52 migration problem?

Hello,

I've been trying to migrate a project from the nrf51822 that uses s110 7.1.0 softdevice to the nrf52832 s132 1.0.0.3 alpha softdevice. I had to change some given .c and .h files to ... (more)

26
views
no
votes
1
answer
Last activity 2017-03-20 10:40:39 +0100 by Kristin flag of Norway

enhanced shockburst security

Is there a way to add encryption to the enhanced shockburst protocol?

22
views
no
votes
no
answers
Last activity 2017-03-20 10:39:27 +0100 by Dajgoro

Wireless charging circuit

Hi

What would be the best way to interface a wireless charging circuit with a nRF52 device? I've found a IC from Texas instruments that does the job, but is it safe to have the charging receiving coil around ... (more)

46
views
1
vote
1
answer
Last activity 2017-03-18 12:31:03 +0100 by endnode

Any recommendations for PC NFC Reader / Writer for nRF52 devices?

Does anyone know of an off-the-shelf hardware and software that will let me read and write nRF52832 devices that are using the NFC Type 4 Library? We've tried the ACS ACR1252 and Indentive SCL3711 readers, along with a bunch ... (more)

65
views
2
votes
1
answer
Last activity 2017-03-17 22:36:47 +0100 by Carsten Wulff

Can I connect a voltage higher than VDD to an SAADC pin if the pulldown is enabled?

The pulldown on the SAADC is 160k. Is it ok to create a resistor ladder by adding an external resistor of, say, 400k, enable the internal pulldown and then input a higher voltage on the other side of the external ... (more)

50
views
1
vote
1
answer
Last activity 2017-03-17 17:13:48 +0100 by Youssif

Enabling/disabling LE Ping

Hi

We have been able to set LE authenticated payload timeout via the following functions:-

ble_opt_t opt = {0};

opt.gap_opt.auth_payload_timeout.conn_handle = ValidHandle;
opt.gap_opt.auth_payload_timeout.auth_payload_timeout = 20;


retVal = sd_ble_opt_set(BLE_GAP_OPT_AUTH_PAYLOAD_TIMEOUT, &opt)

This successfully starts a timer which can cause ... (more)

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