# 25,471 questions

936
views
5
1

## Can I maintain a timer active during off (sleep) state in nRF51822? [closed]

Hi all,

I'm using the nRF51822-EK (PCA10001) and I'm going to develop a bluetooth cadence (and speed) sensor for MTBs. I desire low power consumption and i though to put the nRF in "system off mode" during inactivity ... (more)

72
views
no
1

## broadcasting a characteristic using sd v7.0.0 [closed]

hiii...

I was working on ble_app_hrs example of sdk-6 using sd7.0.0. I tried to add broadcast feature by sending some hex values, dat was working, but now i want to display instant temperature measurement in broadcast mode and ... (more)

207
views
1
vote
1

## Can I use TWI master SW and HW together ? [closed]

Hi,

I need to use 2 TWI bus (hardware constraint) so I wish to drive one bus with twi_hw_master.c and an other with twi_sw_master.c.

Each bus have their own GPIO.

Alex

422
views
no
1

Hello,

downloading the file nrfgo_sdk_2.3.0_setup.exe causes the virus scanner to report an issue and moving the file into a restricted zone.

Can you help on this, are there similar experiences?

this actually prevents me continuing working with ... (more)

445
views
no
1

## Memory protection unit [closed]

Hello.

I'm reading the nrf51 Reference Manual. in MPU section, [ (SWD) will no longer have access to code region 0 or code region 1, as well as no longer being able to access RAM or any peripherals except for ... (more)

408
views
no
2

## ANT Broadcast example wont work, NRF_ERROR_SDM_LFCLK_SOURCE_UNKNOWN [closed]

Hi

I'm just starting with all this. My set up is a nRFgo motherboard with a nRF51422 DK attached (PCA10007). I've installed all the tools of the toolchain as stated in the getting started guide, I'm using ... (more)

652
views
2
1

## Custom point to multipoint protocol for up to 32 nRF51822 nodes? [closed]

I'm renewing my search for a point-to-multipoint radio system, preferably based on the nRF51822. Basically, I need to be able to connect up to 32 (or more!) nodes to a master hub. The nodes each pass requests to via ... (more)

536
views
no
1

## Why simple_uart can't work in ble project? [closed]

My board is nrf51822. Simple_uart works fine in uart_example, but once I copy it to my ble project which can work, it stuck. Part of my code :

advertising_init();
services_init();
conn_params_init();
sec_params_init();

simple_uart_config(RTS_PIN_NUMBER, TX_PIN_NUMBER, CTS_PIN_NUMBER, RX_PIN_NUMBER, HWFC);

simple_uart_putstring((const uint8_t ...
(more)

937
views
no
no

## Problem with pstorage_access_status_get(uint32_t *count) function [closed]

hi, i made ble app with nRF51822 (s110), sdk 6.1.0

and i put this code after a pstorage_store() function to wait finishing of this function.

uint32_t err_code, count;
do {
app_sched_execute();
err_code = pstorage_access_status_get(&count);
APP_ERROR_CHECK(err_code);
} while(count != 0 ...
(more)

160
views
no
1

## Howto save radio power when not needed during bond connection? [closed]

How to reduce power, for bond connections such as cscs services which only requires communication once per second?

Is there a way to manually / automagically turn off the BLE radio when it is not needed. BLE communication is only required ... (more)

327
views
no
1

## nrf51822-sd_nvic_EnableIRQ(GPIOTE_IRQn)-HardFault_Handler [closed]

description of my system: Hardware:nrf51822,pca10001 Software:sdk5.20,run the softdevice s120

According to your reminder.i reference the samples in sdk5.20. i find two locations.

one is in ble_app_hrs,another ... (more)

4k
views
3
2

## NRF51822 + S110 problem with I2C to (MPU9150)

Hi, I recently started working with the NRF51822 and PCA1001 I need to read data from MPU9150 accelerometer via I2C and transmit the results over BLE.

I connected the MPU wires SCL to P0.24 and SDA to P0.25 ... (more)

216
views
no
no

## ANT NRF24AP2 we are struggling to get communication to external device over wireless. [closed]

We have been unable to establish a link between a Garmin HR monitor over the air, we have established USB comms to a cell phone device. We took the transmission line directly off the data sheet, but I see it ... (more)

65
views
1
vote
1

## Why is there a current from 1,5mA bellow 1,8V? [closed]

Hi,

I use a step-down converter(not the integrated one) to generate 1,85V for the nRF51822 in my application.

When the applications starts the output voltage from the converter grows "slow" to 1,85V. I recognized, that the nRF ... (more)

136
views
no
1

## Can DFU(OTA) only run on 7.0.0 version of the SoftDevice? [closed]

Can DFU(OTA) only run on 7.0.0 version of the SoftDevice? thank you!

292
views
no
1

## Direct Test Mode for rRF24L01 [closed]

We will do test the wireless module with the nRF24L01 chip for Japan Radio law. We must achieve test mode such as FCC rule or R&TTE rule. We have some questions about these test. Would you tell us answers ... (more)

256
views
2
1

## s120, max number of connections, hci [closed]

Hello,

as I know max number of simultaneous connections for s120 equals to 8. Is it software or hardware limitation? Is there 'serialization' version of s120 (worked using HCI)? And if it exists what is the limit there?

Best regards, Artem Zemlyanukhin

251
views
no
1

## Heated device hangs after power cycle. [closed]

We are running OTA DFU bootloader provided in SDK 6.0 on nrf51822. We noticed that when the chip has been on for a while and we quickly power cycle it, the bootloader sometimes hangs during start up.

After further ... (more)

452
views
4
4

## Migration to SD functions [closed]

I have to update my non soft device source code to SD because now I will use Radio.

My question is if it is necessary to rewrite all functions which are in SD API. Like:<br>

NVIC_SetPriority(ADC_IRQn, APP_IRQ_PRIORITY_LOW);
NVIC_ClearPendingIRQ ...
(more)

194
views
no
1

## High frequency clock request. [closed]

Is it possible to modify the software in such a way that the nRF1822 sets a GPIO high when it requires its high frequency clock?

We would like to avoid using an extra XTAL in our design, but don't ... (more)

1k
views
9
1

## what does "HVx" stand for ? [closed]

I didn't find the explanation for it .

543
views
no
1

## nrf51822-sd_nvic_EnableIRQ(GPIOTE_IRQn)-HardFault_Handler [closed]

Thank you for your reply,Nikita description of my system: Hardware:nrf51822,pca10001 Software:sdk5.20,run the softdevice s120

I call these functions sd_nvic_SetPriority()/sd_nvic_EnableIRQ() is for use GPIOTE interrupt ,if i push a button ,it should be into ... (more)

162
views
no
2

Dear All: How can I use nRF51822 USB Dongle to connect my Android smart phone(Android 4.3)? I install BLE Scanner App from Google play,but I can't found nRF51822 USB Dongle ? Thanks.

2k
views
9
2

## How to implement the application-level SVC_Handler? [closed]

I want to implement a set of API functions in a separately compiled HEX, just like SoftDevice. It means that I need to use the SVC mechanism, just like what SoftDevice does. However, SoftDevice (S110) already implements a SVC_Handler. How ... (more)

129
views
no
1

## where is the ble_dtm library on mbed.org?

I am adding the dtm rf functionality to an app but I have not been able to find the ble_dtm library up there. Does anyone know the location?

thanks! -Tyler

900
views
1
vote
3

## The connected emulator does not support serial wire output (SWO) [closed]

I am using Eclipse Kelpler SD2 and GNU ARM 4.7 tool chain, plus GNU ARM Eclipse Plugin

"The connected emulator does not support serial wire output (SWO)

My setup ... (more)

582
views
2
3

## PWM breaks softdevice [closed]

Hi,

http://members.efn.org/~rick/pub/main.c works fine but http://members.efn.org/~rick/pub/main... seems to break the softdevice. The big difference in my mind is that there is a Timer2 interrupt running at about ... (more)

584
views
1
vote
no

## Why am I stuck in softdevice address range?

Hi all,

I have developed so far on dev board (mbed) and I am moving to my own board now. After some trouble getting the blank device programmed I have problems running my application code (one MUST have the segger ... (more)

1k
views
1
vote
1

## Device Name set question [closed]

After programming, the device name cannot be changed. Is there any solution that can achieve? I know that I can change the paramter from the function in attached file. But I need the method can make me change ... (more)

1k
views
2
4

## S110 Soft Device documentation? [closed]

Folks,

I have the S110_SoftDevice_Specification v1.1 (great doc, thanks) and the doxygen-generated API docs. But is there an App Note or other document that fills the void between the top-level spec and the detailed function calls, etc? An App ... (more)

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• Resolved questions: 10456
• Total questions: 25472

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