23,748 questions

48
views
no
2

How do I know I2S transfer finished using SDK's I2S driver

When using SDK v13's I2S driver, the data to send is filled via data_handler callback. How do I fill last block data? Assume i2s buffer size is 2000, then every 1000 words sent I have to prepare the next ... (more)

23
views
no
1

pstorage_update() not working when called before start_bootloader()

Hello iam using softdevice 110 and SDK 10.0.0, i have implimented dfu in my project, i want to update a region in EEPROM by calling pstorage_update() function before calling start_bootloader() in dfu_app_handler.c, i have written code in ... (more)

33
views
no
1

Custom ble service creation

I am trying to make custom BLE service to send the data from one nRF52832 to another nRF52832 but we followed the below tutorial "Bluetooth low energy Advertising, a beginner's tutorial, services, characteristics" but we are not getting proper ... (more)

22
views
no
no

How to run OTA on BLE Nano

dear all, i need your help.

Where we are: We use mbed software developer platform. We have BLE Nano V1.5 + MK20 USB Board V1.0 from RedBear. We are able to generate desired program (analog sensor reading) and forward ... (more)

42
views
3
1

Find a service characteristics' handles

Hello,

I am implementing a custom service with several characteristics, one of which is the current temperature. A second characteristic notifies the user if the temperature is above a predefined level, so I would like this second characteristic to be ... (more)

44
views
1
vote
1

M905 for Nrf52832 Chip Module Soldering Problem

we are facing problem with smt M905 module. is there any basic error with this module pad? smt factory in china failed several times to solder this module.

43
views
no
1

PCB antenna or Chip antenna?

Hi All,

This is my first time i am designing a PCB for nrf52840, I need a suggestion regarding the antenna to be used. I am going to have an application over BLE. Which antenna should i use in my ... (more)

46
views
1
vote
2

TWI stops working - SDA bus always LOW

Hi!

I'm developing a project with nrf52832 and I'm getting some problems. The micro is only communicating with an accelerometer (MMA8453) and after some time the communication stops. Using a digital analyzer is possible observe that the SDA ... (more)

59
views
no
no

Uart + BLE throws NRF_DRV_UART_EVT_ERROR

Hi I am using SDK 12.3.0 with softdevice s130 v2. When I try to combine ble_app_hrs_peripheral code with app_uart.c, uart module gives error NRF_DRV_UART_EVT_ERROR in uart_irq_handler. I have enabled uart by using APP_UART_ENABLED and UART_ENABLED under c ... (more)

18
views
no
no

failed pm_peers_delete causes NRF_ERROR_STORAGE_FULL error from pm_conn_secure

I'm using SDK 12.3 and SoftDevice S130 2.0.1 and trying to secure a BLE link with OOB. The nordic board is running as a central and makes a new bonding to a peripheral every time it ... (more)

67
views
no
no

Examples in the NRF52 SDK that show an example of very frequent advertising data packet intervals?

In the examples directory of the NRF52-SDK are there any examples that demonstrate a peripheral sending advertising packets at a very frequent rate?

30
views
3
1

S140 initialisation errors on nRF52840 if RTC2 interrupt enabled

I'm testing a custom application with the following configuration:

• Custom app based on the ble_app_pwr_profiling SDK example.
• Using SDK 13.1
• S140 SoftDevice s140_nrf52840_5.0.0-2.alpha_softdevice.hex
• PCA10056 development board, nRF52840

I've modified the example to configure ... (more)

19
views
no
1

Considering that as soon as the connection is established (GAP Peripheral device receives CONNECT_REQ packet) and advertising is over. Is it possible once the connection is established to make the device not discoverable and keep this connection running? Does the ... (more)

38
views
2
1

Smartphone as peripheral

Can the smart phones or tablets be configured as a peripheral? If yes, why is this not common? Are there any limitations if a tablet/phone is configured as a peripheral device?

We are looking to see if we can ... (more)

136
views
no
2

Multiperipheral UART Example

I am using 3 nrf52 DKs with S132 and SDK13 to try and implement a combination of the multilink and UART examples. I started with the ble_app_uart_c example and added the relevant code from the ble_app_multilink_central example to connect to ... (more)

33
views
no
no

setBeaconLayout on Android-Beacon Library

Has anyone successfully used the Android-Beacon Library to detect the nRF51822 Beacon on and Android application? I tried several different layouts but I just can't detect it.

public class MainActivity extends AppCompatActivity implements BeaconConsumer {

protected static final String TAG ...
(more)

42
views
no
1

Changing SD (s110->s130) and wrong memory organization

Hello,

I'd like to upgrade nrf51822 QFAC custom board firmware via DFU and change SoftDevice from s110 to s130. Because of larger (than s110) size of s130 I haven't enough space for my application with current FLASH memory ... (more)

1k
views
2
2

In short:

• Is it possible to connect a nRF51822 s110 peripheral from a central without the need for sending advertising packets (by peripheral)?
• If (hopefully) yes, what's the required steps (shure, the central must know the MAC)?

A stupid ... (more)

45
views
1
vote
1

Strategy for sending alert to phone from nrf52

Hello,

I am trying to create an application that sends a notification from the nrf52 to a smartphone when a sensor reading exceeds a certain value. Would the immediate alert service be appropriate here, or should I just add a ... (more)

113
views
no
1

Issue Resolving DNS in Border Router

I'm following the tutorial in the NRF52840 SDK on setting up a Thread Border Router hereand I've run into some issues during testing. For one, I'm trying to resolve ipv4.google.com on the dev kit ... (more)

36
views
no
1

Hi everyone;

Best Regards

51
views
no
no

External NRF52832 Program with NRF52DK - Reset not working

Hi,

I'm trying to program an external NRF52832 board with the NRF52-DK, per the instructions in this post.

Programming works fine, but the code doesn't execute after reset. I'm using nrfjprog (on OSX) with --chiperase --program and ... (more)

38
views
2
1

Programming nRF51422 externally

Hi,

I have designed and made a PCB with the nRF51422 chip on it. I am programming the chip externally using the P20 header pins on the nRF51-DK. I am not sure whether the chip on the PCB is being ... (more)

56
views
no
1

52832 ADC just do samle one time

Hi,

I'm using the ADC of nRF52832 on nRF5 SDK V12.2. The setting as attachment. I found that it just do sample one time. But I have use timer to call nrf_drv_saadc_sample() to the SAADC sample task every ... (more)

22
views
no
no

nRF24L01 IRQ pin jitter on two modules in RX mode

Hello! I try to use three modules with chip nRF24L01 to syncronize two slave devices by one master device without wires. Required accuracy is about 10 nanoseconds. My idea is to send packet by master module, receive it by slave ... (more)

50
views
no
1

Unable to connect to nRF52832 with old phones

Hello,

We have problem BLE connecting to the nRF52832, if we use the method gap_init(), the "better" smartphones can connect(those who support BT 4.2). If we skip the gatt_init() method, the older smartphones can connect(those who only ... (more)

98
views
no
2

QD ID for nRF51x22

We are obtaining a license from bluetooth SIG to import to the States Bluetooth smart trackers we bought from China. They are made using nRF51x22. How can we find the Controller Subsystem & Host Subsystem QD IDs? We are not Technicals ... (more)

90
views
no
2

Timer power consumption in NRF51822 ??

I'm using nrf51822 & S130 to read the temperature humidity values every 5 seconds from AM2301 sensor. For that I am using timer in system on sleep mode. The current consumption should not be more than 100uA. But while using ... (more)

29
views
1
vote
1

Combining NDEF messages

I want to use the Launch App message as well as the Text Record Message together, so that when my app is launched, I can also access the message that will give me something like the device name.

IS this ... (more)

29
views
1
vote
no

UART DFU Sequence number, ACK, image len

What I have to do if I met this ? I round length to fit (len+4-(len % 4)). Is it right ?

if (!(IS_WORD_SIZED(m_start_packet.sd_image_size) &&
IS_WORD_SIZED(m_start_packet.bl_image_size) &&
IS_WORD_SIZED(m_start_packet.app_image_size)))
{
// Image_sizes are not a multiple of 4 (word size ...
(more)

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• Resolved questions: 9858
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Recent blog posts

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Posted 2017-07-14 10:31:56 by Krzysztof Loska
• nRF Connect macros (currently Android only)

Posted 2017-07-14 13:29:14 by Aleksander Nowakowski
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Posted 2017-07-10 14:34:39 by Yaniv Nis

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