# 1,125 questions

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23
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## High IDLE current on nRF52832

Hello all,

During current measurements of our product using nrf52832QFAAB0 I've noticed a high IDLE current of ~450uA. Trying to isolate the problem we programmed our board with ble_app_beacon example from SDK 14.0.0 and Soft Device s132 ... (more)

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## NRF52832 erase_bonds = 0x01

When I change ATT_MTU size and add the following code: #define CONN_CFG_TAG 1

// Configure the maximum ATT MTU.
memset(&ble_cfg, 0x00, sizeof(ble_cfg));
ble_cfg.conn_cfg.conn_cfg_tag                 = CONN_CFG_TAG;
ble_cfg.conn_cfg.params.gatt_conn_cfg.att_mtu = NRF_BLE_GATT_MAX_MTU_SIZE;
err_code = sd_ble_cfg_set(BLE_CONN_CFG_GATT, &ble_cfg, ram_start);
APP_ERROR_CHECK(err_code ...
(more)

14
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## Which QDID to use for BLE product declaration?

We developed a new BLE hardware product using the Laird BL652 third party module. Our product is based on the latest Softdevice S132 V5.0.0.

Now I'm starting the Bluetooth SIG product declaratioin and would like to know ... (more)

51
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## BLE_ERROR_GATTS_INVALID_ATTR_TYPE when sending notification with sd_ble_gatts_hvx()

Hello,

I've been all over the forum trying to solve my problem but I just couldn't find enough information.

I'm trying to set up notifications in my application, but I cannot get rid of the BLE_ERROR_GATTS_INVALID_ATTR_TYPE error ... (more)

12
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1

Hello,

I implemented a function to add characteristics to a service, but I'm having a problem when I add notifiable characteristics. I pass a set of flags to my function, and when I set the NOTIFY bit, sd_ble_gatts_characteristic_add returns ... (more)

43
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## MPU9250 is not showing output

i am working with mpu xx example given in nordic website. it seems code is working fine i.e. compiling and dumping into nrf52 DK, But not showing any output values.

i was trying to run nrf5-mpu-simple example but not ... (more)

65
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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)

64
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## Multi central connect to multi peripheral example

Hi all , I using module NRF52832 and SDKv14 . I have 2 board central and 2 board peripheral . I want to connect each board central to all board peripheral and connect each board peripheral to all board central . Pls give me ... (more)

40
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## NRF52 Csense_drv capacitance calculation.

Hello,

I have a question on how to calculate the capacitance based on oscillator relaxation for NRF52. For example, in the Csense_drv example, when pin is touched by finger, it generates digits (e.g. 850). My question is how I ... (more)

34
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## SPI Master stops working after S132 softdevice enabled

Initialization:

The softdevice is initialized as in the BLE UART example. The body of the ble_stack_init() function is identical to the BLE UART example.

SPI is initialized as in the SPI peripheral example, but I have gone over to writing ... (more)

34
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1
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1

## Transferring data received over ble to sd card

Hi All,

I am working on pca10040, nrf52832 and s132. I am using ble_app_uart and sd card, where i want to transmit data received over ble to the sd card.

Can you help me with how can i do so ... (more)

38
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1

## Soft device somtimes don't want to start advertising

I have an application based on ble_app_hrs_freertos from SDK14. Sometimes the application will not start advertising. When this happens, it does not help to power-cycle device. Sometimes it helps to reset the device with nRFgo Studio, simply to let it ... (more)

30
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## Can I get current transmitting channel in nRF52832

Hi,

I'm wondering if I can get current transmitting channel during a connection. So 1. Is there a way I can directly read current transmitting channel? 2. If not, is it possible to know the hopIncrement for current connection ... (more)

30
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## Can central board comunication with peripheral board and other central board

Hi all , I have one question . I have 3 board NRF : 1 peripheral and 2 central board . I want to transmiss data from peripheral board to central board 1 then from central board 1 to central board 2 . I want ... (more)

147
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1
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2

## How do I control the ram_start and app_ram_base in softdevice_enable for s132? They should be equal but are not. (0x20002000 vs 0x20002060)

I am having trouble running softdevice_enable. Here is what happens:

After main(void) starts the code is:

log_init(); // WORKS clock_init(); // WORKS buttons_leds_init(&erase_bonds); // WORKS ble_stack_init(); // FAILURE results in infinite resets due to a weak error callback.

ble_stack_init is boilerplate code ... (more)

110
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## SHT10 temperature and humidity sensor library for nRF52832

Hi,

I'm building a project with nRF52832 dev kit and the SHT10 temperature and humidity sensor, I'm searching for a library/example project of this sensor and the nRF52. So far I didn't find one, are you ... (more)

30
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2

## Import Blinky-S132 KeilC project to SEGGER Embedded Studio

Hi all , I am beginning with SEGGER Embedded Studio . I flow 2 tutorial at :

I using NRF52832 board S132 , SDKv14 I follow these steps :

1. install nRF SEGGER Embedded Studio Device ...
(more)

39
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1
vote
1

## how to set the RAM start sddress of app and bootloader

I am working on OTA DFU about nRF52810. My refernece project are ble_app_uart\pca10040\s132 and bootloader_secure_ble\pca10040 I find that the RAM start address between are different. This is the start RAM address of APP:

This is the start ... (more)

69
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1

## How can i interface MPU9250 with nRF52 DK

As i am new in embedded programming,I was trying to connect MPU 9250 with nRF52 DK by using given examples. now it is showing error

  #error "No MPU defined. Please define MPU in Target Options C/C++ Defines"


where ... (more)

46
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2

## Measuring elapsed microseconds between 12 successive rising edges on 12 GPIOS on NRF52832 DK

Hi everyone,

I'm new with nrf52832, and I need to measure elapsed time in microsecond between rising edges of 12 different Gpios. I have 12 piezoelectric sensors filtered, amplified, getting a 0V-3.3V Logic level in input. Once one ... (more)

31
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1

## Hey folks! I have a problem here! I'm using "app_uart.h" but it throws an error saying no such file or directory

I have changed the makefile and the SDK config file accordingly! but the error remains constant!

113
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2

## How do I calculate throughput for a BLE Mesh?

Good day!

How can I calculate the maximum throughput for BLE Mesh running on the nRF52832 and the S132 without packet loss in ideal conditions?

I have tested throughput in BLE Mesh SDK v0.9.1 between two nodes and ... (more)

46
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1

## RTC function using sleep mode

Im working on 14.0 and s132 and work inside ble_uart code...i was add rtc inside that code sucsessfully but now.. when device goes to sleep so rtc interrupt handler function not calling stop... so, can i use rtc ... (more)

37
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1
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1

## where is the "nRF5 Series User Specification" document?

I have been trying to find a document referenced here 1.

For more information on both modes, see sd_app_evt_wait and the nRF5 Series User Specification (Section: POWER - Power control).

Does anyone have a link to ... (more)

38
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1

## Setting slave connection interval (same as GAP PPCP?)

Hi,

I'm wondering if the slave connection interval range is the same as the GAP peripheral preferred connection parameters i.e. does it make sense to do the following (GAP connection parameters have been set before):

ble_gap_conn_params_t    gapConnParams;
sd_ble_gap_ppcp_get ...
(more)

30
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## Problems with PPI groups + S132

I have problem with PPI on NRF52832 (SDK 13.1.0, softdevice S132 4.0.2).

1. Programmable peripheral interconnect (PPI) usage by Softdevice S132 according to infocenter.
2. Reservation of PPI is defined in components/softdevice/s132/headers/nrf_sd_def.h. There ...
(more)

51
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1
vote
1

## Bug: App Scheduler and freeRTOS

There seems to be a bit over a bug with the freeRTOS example. If you add the Scheduler to the BLE thread, Scheduler events will always be one event behind as there are only executed on the next loop. The ... (more)

31
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1

## how to handle PM_EVT_PEER_DATA_UPDATE_FAILED

Hi,

I'm seeing this error PM_EVT_PEER_DATA_UPDATE_FAILED sometimes and I need to understand what are the options on handling this error except for just asserting it. I can't seem to find any information on it.

So far, I've ... (more)

24
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## Parsing Device_name

I have a number of nRF52832 beacons that advertise at a set interval. All the beacons have a "device_name" set as "ECO". My application scans for these beacons with the device_name == "ECO". When the application reads a beacon device_name of ... (more)

42
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## Cryptocell for pca10040

Hi All,

I am new here, i wanted to know if i can perform encryption algorithm using pca10040. Do we have cryptocell on nrf52832-dk?

Regards, khan

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## Recent blog posts

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