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19,085 questions

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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)

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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)

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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)

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1
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2
answers
Last activity 2017-01-18 04:42:02 +0200 by love you

nRF52840 over the air firmware/software update

Does nRF52840 support over air firmware/software update? Is there any white paper or app note available?

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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)

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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)

52
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2
votes
1
answer
Last activity 2017-01-18 00:14:51 +0200 by sfujimoto

nrf52832 does not work.

hello.... Nrf 52832 does not work. With a newly developed board, Programming with nrfgo studio and J-link is not possible. It feels like it does not have a good reset. The signal of SWDCLK and SWDIO is something strange. Is ... (more)

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3
answers
Last activity 2017-01-18 00:02:12 +0200 by Roger Clark

nRF51822 reading Heart Rate Monitors

Hi, I need to read more than 3 or 4 Bluetooth Heart Rate Sensors (like chest strap, arm band, and so on)... I need to do this using Arduino and some library. Could someone help me? Thanks.

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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 ?

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votes
1
answer
Last activity 2017-01-17 23:23:53 +0200 by Håkon Alseth

Microbit development with Segger Embedded Studio & SDK 12.2

All,

I recently acquired a BBC Microbit and have been having a play with trying to setup a development environment using the Segger Embedded Studio and the Nordic 12.2 SDK. I was wondering if anybody else had been down ... (more)

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1
answer
Last activity 2017-01-17 21:18:32 +0200 by Jørgen Holmefjord flag of Norway

can i control pin 24(or any other) on nrf51 dk(nrf51422) using iot sdk?

I have set up raspberry pi 3 as a border router and programmed the the nrf51422 using the iot_ipv6_coap_server_pca10028 and could successfully switch on and off led3 and led4 using copper coap,can i control pin24 on nrf51dk if yes ... (more)

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votes
1
answer
Last activity 2017-01-17 20:57:27 +0200 by AndrewF

rx chain delay larger then tx chain delay

Hi,

in the NRF52832 documentation the TX chain delay is 0.6 µs while the RX chain delay is 9.4µs. Does that mean if transmitting two packets in a row to the same receiver, that the receiver will miss ... (more)

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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)

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3
votes
1
answer
Last activity 2017-01-17 18:57:03 +0200 by SRA

Is it possible to program nRF52 DK with Python instead C language?

I wonder is it possible to program nRF52 DK with Python instead C language? And are there any examples with python?

18
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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
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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)

48
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1
vote
1
answer
Last activity 2017-01-17 16:28:41 +0200 by Ole Bauck flag of Norway

IS it possible to supply NRF52810 lbr for eagle layout best regards

IS it possible to supply NRF52810 lbr for eagle layout best regards

16
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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)

43
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votes
1
answer
Last activity 2017-01-17 15:37:54 +0200 by Hung Bui

In LE Privacy mode, does the address of the advertising entity change after connection is established?

In Bluetooth Spec (CoreV5.0, Vol6, Chepter6, Section1) it is mentioned that the random private address is generated periodically by a timer handler. I could not find any mention on whether the timer should be stopped when a connection is ... (more)

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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)

29
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votes
1
answer
Last activity 2017-01-17 15:05:39 +0200 by Sigurd flag of Norway

Hardware requirements for nRF Sniffer [closed]

I have a Nordic Semiconductor dongle:

PCA10000 V2.0.0 2013.04

Can this be used with the current version of nRF Sniffer (1.0.1_1111)?

31
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1
vote
1
answer
Last activity 2017-01-17 14:56:41 +0200 by Hung Bui

How can I read the payload data sent from service?

I am using the nRF52840 Preview DK with BLE 5.0. In the BLE ATT_MTU Throughput Example,I use several api such as sd_ble_gatts_value_get and so on,but i still can not read the correct data. How can I read ... (more)

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1
answer
Last activity 2017-01-17 14:50:17 +0200 by Sigurd flag of Norway

usb transfer on nrf52840

1.specification says that we should trigger EP0STATUS task to initiate the status stage for control transfer(read/write).

actually nrf52840 will auto ack the OUT TOKEN i.e. the status stage of control read transfer,but nak the IN ... (more)

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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)

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1
vote
1
answer
Last activity 2017-01-17 14:12:39 +0200 by Sigurd flag of Norway

Unmodifiable APP_MAX_ADV_SLOTS in Eddystone example

In Eddystone example in SDK 12.2.0, APP_MAX_ADV_SLOTS parameter is by default 5, but if I try to use less than 5, an error appears in es_flash.c because in the code, 5 slots are fixed.

Two options I ... (more)

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votes
1
answer
Last activity 2017-01-17 13:58:23 +0200 by Jawad

Issue in publishing and receiving more than one character using MQTT

Hello everyone,

I have been using nrf52 IoT SDK for MQTT implementation. Everything works fine as long as I am publishing or receiving only one character i.e.

param.message.payload.bin_strlen = 1;

inside app_mqtt_publish. When I try to change ... (more)

19
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no
votes
1
answer
Last activity 2017-01-17 13:47:11 +0100 by Sigurd flag of Norway

LL_CONNECTION_UPDATE_REQ PDU

I'm looking for an example code of central role which can run on nRF52 DK. I want to check if it is possible for nRF52 DK to send a LL_CONNECTION_UPDATE_REQ PDU to slave.

Does anyone help me to check this ?

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no
votes
3
answers
Last activity 2017-01-17 13:33:29 +0200 by Kristin flag of Norway

SDk12 ble_app_hrs_rscs_relay has no BLE_ADV_EVT_IDLE in on_adv_evt

Hi I use ble_app_hrs_rscs_relay example with sdk12 and when the APP_ADV_TIMEOUT_IN_SECONDS is reach the nrf52 stop advertising but the on_adv_evt has no BLE_ADV_EVT_IDLE flag coming.

I do ble_advertising_start only now. Do I need call sd_ble_gap_scan_start on the same time with ... (more)

16
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votes
1
answer
Last activity 2017-01-17 13:19:58 +0200 by Hung Bui

white list during scanning

hello there i want to scan particular device. so i am using whitelist. i change in hear_rate center code. but its not working. other unwanted devices are also scanned. i am using sdk11.main.c

15
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no
votes
1
answer
Last activity 2017-01-17 13:19:36 +0200 by Brendan S

app_timer_cnt_get() always returns 0x0018000 (SDK12.1.0)

I'm trying to use app_timer_cnt_get() to implement an RTC Calendar system on a Gigawit module (nRF51822).

I have a test app_timer that has presacler=0 and period=3 seconds. The callback works as I toggle a LED, and it ... (more)

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