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Last activity 2017-10-16 17:06:45 +0200 by Jørgen Holmefjord flag of Norway

SD Write Problem

Hi Everyone,

I am trying to record data from ADC to a SD card every 500ms using nrf52832. I am following the fatfs example. Before I had a problem whereby every approximately 10s I would lose a few samples from ... (more)

61
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1
answer
Last activity 2017-10-16 17:03:10 +0200 by Jørgen Holmefjord flag of Norway

Low Power SAADC

Hi everyone,

I am having problems in getting the low power mode in SAADC to work. If I enable it in the config file then the ADC doesn't run anymore.( Blank in the RTT viewer) I have four channels ... (more)

51
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1
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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)

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1
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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

1k
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Last activity 2017-09-28 08:53:54 +0200 by Jørgen Holmefjord flag of Norway

which pins of nRF52832 can support PWM and how many pins can support.

i need to connect 8 DC motors to it,using PWM channel.It is possible to connect with it

192
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2
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2
answers
Last activity 2017-09-27 16:59:21 +0200 by endnode

what are the documents require to start programming with nRF52

examples are given but how can we apply them as per our requirement

31
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Last activity 2017-09-26 20:52:47 +0200 by Vishb

How i use battery service level measurement?

Hello,

I am using NRF52832 boars s132 and sdk is 13.1. I have developed my application is read analog accelerometer valie and send to mobile apps. Now i want to also battery indicator in my android apps. So how ... (more)

47
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1
answer
Last activity 2017-09-26 01:34:25 +0200 by Nguyen Hoan Hoang flag of Canada

Large amounts of data over UART

I'm trying to sample the 4 of the analog inputs on the nrf51822 at upwards of 10kHz and get the data out some how. Currently I'm using printf statements but that starts to break down around 500Hz.

Does ... (more)

39
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1
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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)

50
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1
answer
Last activity 2017-09-08 11:36:26 +0200 by Jørgen Holmefjord flag of Norway

When does the event NRF_DRV_ADC_EVT_SAMPLE occur

Hi there, I was trying out the ADC example which is sampling 10 times the ADC and then generating the event NRF_DRV_ADC_EVT_DONE to process the data. I extended the handler function to also react to event NRF_DRV_ADC_EVT_SAMPLE. But this does ... (more)

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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 ?

220
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1
answer
Last activity 2017-09-06 13:49:43 +0200 by Joakim Jakobsen flag of Norway

PWM channel

What is PWM channel and what does it indicates?

What is advantage to have more PWM channels ?

31
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Last activity 2017-09-05 18:21:40 +0200 by harlek

NRF51822 got odd behavior when calling app_timer_start before mainloop

Hi,

  • I am using SDK 12.02 with softdevice 130 and having a odd issue here.

  • In my application, I want to advertise ADC value via beacon and to report the ADC value via serial. In this design, I intend ...

(more)

64
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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
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no
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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)

113
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1
vote
1
answer
Last activity 2017-09-05 09:22:52 +0200 by Jørgen Holmefjord flag of Norway

Using ADC with Sleep Mode

I'm relatively new to development on the nRF52832 and I'm trying to find information on how to use the sleep mode with the SAADC.

Goal: The micro should be in sleep mode until an event is triggered - this ... (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)

34
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1
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1
answer
Last activity 2017-08-31 18:19:25 +0200 by endnode

NRF51 Beacon kit data packet

Hi,

what is the maximum length of broadcast data that NRF51 beacon kit supports?

101
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1
vote
2
answers
Last activity 2017-08-30 15:45:00 +0200 by Jørn flag of Norway

Diseño de beacon nrf51822- QFAC(DC/DC)

good morning to all I wanted to ask if anyone has a design of nrf51822 where an external temperature sensor is used, to know how the connection to the chip is. Should I buy a sensor with an analog output ... (more)

186
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no
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1
answer
Last activity 2017-08-29 11:04:59 +0200 by Jørgen Holmefjord flag of Norway

Suggestion regarding our use case

Hi,

Need you suggestion regarding our use case but first I would like to explain about our use case.

In our use case there be beacons and receiver. Beacon we are considering using Nordic NRF51 beacons. On the receiver side ... (more)

91
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no
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1
answer
Last activity 2017-08-29 09:12:01 +0200 by Jørgen Holmefjord flag of Norway

nRF51822 BEACON KIT SUGGESTIONS

Hi,

We can currently nRF51822 beacon kit. I want to know that do you have other beacon kit which have high range and in this large broadcast data can be broadcast ??

What is maximum range and broadcast message length of ... (more)

724
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2
answers
Last activity 2017-08-28 09:37:27 +0200 by Usman

Suggestion

Hi,

I need you suggestion / information about Nordic chip. We currently have nRF52 (nRF52832) chip. However, in our application we will be using Nordic beacons as an transmitter and we already have nRF51 beacon kit and on receiver side we ... (more)

77
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no
votes
1
answer
Last activity 2017-08-25 16:25:15 +0200 by vishal

problem with transmitting data via ble_uart_Service to apps with high speed rate?

Hello,

I am using nRF52832 s132 soft device and i have read accelerometer adc 3 axis value with sample rate of 244us instead of ms. For controlling my device i have send start command via Nordic tool box uart mobile ... (more)

35
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answers
Last activity 2017-08-24 07:01:01 +0200 by Yasser

Using a MUX with nRF51822 ADC

Hi,

I am trying to use a mux change among 3 differential channels. The diff signal then goes through an instrumentation amplifier. The steps I'm using:

switch to ch1, read adc1, wait 3ms switch to ch2, read adc1, wait ... (more)

1k
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1
answer
Last activity 2017-08-22 13:14:09 +0200 by Jørn flag of Norway

nRF52 PCA10040

Hi,

I have Nordic NRF52 DK. What chip does it have? because there are quite many chips of NRF52 series and can you also tell me about the PCB reference design of the chip?

225
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1
answer
Last activity 2017-08-05 12:50:07 +0200 by endnode

How to send large data through BLE notification using nrf52832

Hi everyone,

I am writing a program in Keil whereby I have to send a large amount of data through BLE notification in real time. The program works by having two timers, one timer is used for the ADC to ... (more)

90
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answers
Last activity 2017-07-18 05:29:15 +0200 by Nikhil

Reading the Analog input on NRF51

https://github.com/NordicSemiconducto... I have flashed the above program in the link on to my nrf51822 DK. I can see the values of the samples but i do not understand what the output is. The analog pin that is ... (more)

165
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answers
Last activity 2017-07-13 21:47:41 +0200 by Otavio Borges

SAADC low power SDKv13.0.0 and S132

Hello,

I'm currently developing an application on nrf52832 that'll use SAADC low power to fetch battery voltage level and report that value on BLE advertising data. I've adapt github example nFRF52-ADC-examples to the following:

#define REFERENCE_TO_MV     0 ...
(more)

63
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no
votes
1
answer
Last activity 2017-07-11 21:07:07 +0200 by JTL

not getting NRF_SPI_EVENT_READY event

Hi - In my app, I'm using Bluetooth, the ADC, the TWI, and the SPI. The general idea is to measure lots of things, store the data in SPI NOR FLASH, and occasionally flush some data through BLE. All is ... (more)

39
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1
vote
1
answer
Last activity 2017-07-06 23:26:13 +0200 by RK flag of Singapore

High Frequency Pin for Clocking External ADC [closed]

Hello,

I'm starting to work with a new ADC that I need to drive with an external 4MHz clock that I will need to drive with my MCU. Is there a way to set up a pin to passively ... (more)

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