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Last activity 2017-10-17 15:18:18 +0200 by Abhijeet kapse

how to write a functions(program) for transmitting and receiving data over uart using nrf 51822?

Hi, there i am using nrf51822 to communicate with quectel ec25 .i want to send AT commands over uart and receive some response from quectel.for eg. i am sending a "AT" command i should get "ok" response in return ... (more)

41
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no
votes
1
answer
Last activity 2017-10-17 03:47:55 +0200 by Alex

Performing DFU with nRF Connect v1.8 Fails to Switch from App to Bootloader - Worked on 1.7.5

Since upgrading to nRF Connect on my IOS device the DFU won't reconnect to the BLE in the boot-loader after initiation from the application.

The device will migrate to the boot-loader and begin advertising but nRF connect doesn't ... (more)

54
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1
vote
1
answer
Last activity 2017-10-16 12:04:52 +0200 by lalit-tmt

nrf52822 iot mqtt implmention??

Hi,

We are able to interface nrf52822 with wiznet5500i.But We need help or how we will process further for mqtt AWS iot stack..

51
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no
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1
answer
Last activity 2017-10-12 10:44:12 +0200 by Sigurd flag of Norway

how to define gpio pins and generate pwm on gpio pins?

Hi There, i am new to nrf51822 and new to program this kind of controller.I searched over the website, I couldn't find a good introductory documentation for programming the nrf51822, specifically the nrf51-dk. i have two problems 1 ... (more)

18
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Last activity 2017-10-11 07:30:44 +0200 by KETAN_PATEL

How to turn on Leds only for advertising time?

Hi, i am using SDK v8.0 and in main function, initialization like this err_code = bsp_init(BSP_INIT_LED | BSP_INIT_BUTTONS, APP_TIMER_TICKS(100, APP_TIMER_PRESCALER), button_event_handler); and

in advertising_start function, calling function is err_code = bsp_indication_set(BSP_INDICATION_ADVERTISING); this is working. but i want like this ... (more)

40
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-1
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1
answer
Last activity 2017-10-10 11:04:56 +0200 by Jørn flag of Norway

how to interface tcrt1000 optical sensor with nrf51822?

Hi ,there i have tcrt1000 optical sensor wants to interface with nrf51822 so can anybody provide me the tutorial on this things with a code... cheers, Abhijeet

45
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no
votes
1
answer
Last activity 2017-10-09 21:50:34 +0200 by B

Has anyone used nf51 bluetooth with some app mobile?

Has anyone ever used nf51 bluetooth with the app inventor?

I have values ​​coming out of the microcontroller terminal. I want to send them to a mobile application using the app inventor.

But I do not know how to do ... (more)

42
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no
votes
1
answer
Last activity 2017-10-07 11:18:56 +0200 by endnode

What is the bandwidth of nRF51 Series SoC?

Im currently using NRF21l01 (32 byte) however I need more bandwidth any suggestions?

39
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no
votes
1
answer
Last activity 2017-10-03 13:20:05 +0200 by Sigurd flag of Norway

start and stop advertising packet of every 5 min?

hi, i want to advertise packet every interval of 5min. how can i start and stop advertise packet.

21
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no
votes
1
answer
Last activity 2017-10-03 10:08:59 +0200 by Sigurd flag of Norway

RTC and nrf_timer2 with BLE SOFTDEVICE nRF51_SDK_8.0.0

hi, i want to use 2 timer in my application and BLE continuous advertising. i'm able to do with NRF_TIMER2 and BLE continuous advertising and it's working fine. but when i add RTC0 part in my code, it ... (more)

39
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no
votes
1
answer
Last activity 2017-10-02 13:09:33 +0200 by Hung Bui

what version of nrf connect apk, can use for sdk 6.0.0

I use the sdk 6.0.0 dfu, and want to update firmware with smart phone. So,which nrfconnect and mcp version matches the sdk 6.0.0?

40
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no
votes
1
answer
Last activity 2017-10-02 10:41:36 +0200 by Sigurd flag of Norway

how to send and receive data using i2c and spi protocol

hello there, i want to send and receive data using spi and i2c protocol and i am using nrf51422 .how to interface which pins should i use to make spi and i2c communication.

good help appriciated!!

cheers, Abhijeet

48
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3
votes
1
answer
Last activity 2017-10-01 12:27:36 +0200 by endnode

nrf51822 throughput iPhone6 BLE 4.0 iOS 10.3

Hello,

I'm using a nRF51822 to send data to the iPhone using the NUS service. I'm using the oldest SDK4.x and v5.x S110 soft device. I know that the least connection interval for iOS 10 is ... (more)

105
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1
vote
1
answer
Last activity 2017-09-27 14:19:25 +0200 by Hamza

What are the differences between IAR and GCC ?

Hi everyone !

We migrated a functional code from IAR to GCC compiler. But we got some trouble working it with GCC. The code compiles but it doesn't act properly with GCC(I use nRF UART for debugging, we didn ... (more)

33
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1
vote
1
answer
Last activity 2017-09-26 20:40:16 +0200 by endnode

How the nus mode is automatically subcontracted and sent efficiently? [closed]

Hi, there

  1. NRF51822
  2. SDK9.0.0 and S110

How to subcontract in uart nus mode to ensure that each packet does not exceed 20 bytes and is sent as quickly as possible? The official demo must pass the special character ... (more)

38
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no
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no
answers
Last activity 2017-09-22 06:38:15 +0200 by prasanna

Issue with initializing pstorage twice ??

According to here , pstorage_init should not be initialized twice.It links to another thread and the documentation which says the same but does not mention downfalls of doing so.

In my scenario, my error handler re-initialises the whole stack including ... (more)

1k
views
3
votes
1
answer
Last activity 2017-09-20 17:47:32 +0200 by Anonymous

How gpio related to gpiote?

Hi All,

   i would like to know  how gpio relate to gpiote,i go through some code and find
    out , that  gpiote handles in,out,config registers that is handle by gpio also ,How it is 
    happening ?

   so can any ...
(more)

271
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2
votes
1
answer
Last activity 2017-09-19 11:12:20 +0200 by jack khan

BLE_ERROR_NO_TX_BUFFERS

Hi.

What is the best way to handle error 0x3004 on ble_nus_string_send(...)?

The issue is that i use scheduler

52
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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)

46
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no
votes
no
answers
Last activity 2017-09-13 14:01:46 +0200 by prasanna

nrf51822 BLE connection issue

Hello, We have a setup where we connect an nrf51822 and an iphone.The nrf51822 connects to the iphone, notifies the data and disconnects roughly every minute.(This is done to save battery).Default battery capacity this way is roughly ... (more)

100
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no
votes
1
answer
Last activity 2017-09-11 13:16:35 +0200 by Valer_I

Ble rare disconnection on softdevice with active timeslot session.

Hi, During testing I noticed rare BLE connection loses with Softdevice S110 when timeslot session is active. It is hard to catch them with sniffer due to rare behaviour. So the question is about ever known reasons of connection loses ... (more)

17
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no
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no
answers
Last activity 2017-09-11 07:34:21 +0200 by Milk

system halted when disconnect the bluetooth

The device use SDK9.0,during the using of device,when disconnect the bluetooth of phone system sometimes,the system halted.

So I make an experiment about the probability of the situation happened,generated a android app: connect the device ... (more)

49
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1
vote
1
answer
Last activity 2017-09-09 12:15:41 +0200 by endnode

RTC wake up not happening in system-off mode

Hi,

We are using system-off mode to save power in our device which uses nrf51822 chip. Our application requires regular wake-ups using RTC interrupts.

But the wake up is not happening since RTC is also off during system-off mode.

  1. Any ...
(more)

32
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no
votes
no
answers
Last activity 2017-09-07 17:47:55 +0200 by Mehdi Chafik

S110 and secure connection

Hello,

I use stack S110 V7.1.0 on nRF51822 (the device is a remote with 4 buttons). Currently the remote send advertising frame with the pressed button into the data, we would like to securise the connection.

1) I ... (more)

94
views
1
vote
1
answer
Last activity 2017-09-06 16:27:48 +0200 by erltot

Reconfigure of WDT

hi,

i need to reconfigure the WDT and also change the timer value in WDT. is it possible to do that.

i tried but i can not.

1.configured wdt with timer 5sec. 2.i had reconfigued wdt with timer ... (more)

111
views
no
votes
1
answer
Last activity 2017-09-06 16:05:48 +0200 by Petter Myhre flag of Norway

Concurrent connection on NRF52840

How many concurrent connections can be made with NRF52840 at one time? How many broadcast connection or message it can receives at one time ?

64
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no
votes
1
answer
Last activity 2017-09-05 15:06:44 +0200 by Joakim Jakobsen flag of Norway

PCB reference design for NRF52840

I need PCB reference designs for NRF52840. Please could you guide me about it ?

174
views
no
votes
1
answer
Last activity 2017-09-05 12:49:36 +0200 by Joakim Jakobsen flag of Norway

NRF52832, NRF52840 and NRF52810 comparison

Please check the file attached in the attachment section. I am trying to compare NRF52 series chip. Please correct me if I am wrong and please add the missing values of NRF52810 chip.

This table will be good help for ... (more)

106
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no
votes
1
answer
Last activity 2017-09-04 16:52:30 +0200 by AmbystomaLabs

Antenna for NRF52

Hi,

I want to know what kind of antenna nordic recommend to use with NRF52 chips.

Please could you guide us about it. We are interested in some sort of table where we can check and compare the antenna sensitivity ... (more)

56
views
no
votes
no
answers
Last activity 2017-09-01 18:09:07 +0200 by milena flag of Germany

sd_flash_write returns NRF_ERROR_INTERNAL [closed]

Hello.

Using nrf51_8.0.0_API, I'm experiencing the function sd_flash_write returning the value NRF_ERROR_INTERNAL. As documented in nrf_soc.h, this error code can never be returned.

I'm using a testing software which periodically calls sd_flash_write. After a couple ... (more)

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