# 31 questions

Tagged
• x
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## app_twi_perform fails with NRF_ERROR_INTERNAL

Hello Nordic Forum!

Our product relies heavily in the TWI Bus, we use it to communicate with different sensors periodically. The most "important" one is read once every 4 ms.

Additionally we have a TWI controlled IO expander, which has ... (more)

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Hi

I am trying to use the serial bootloader to upgrade nrf52 application, but I get verification failure.

I am using nrf52832 with SDK 13.0.0 & S132 SoftDevice v4.0.2. I have loaded experimental_bootloader_secure_serial project to the device ... (more)

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## Maximum expected interrupt delay when using Softdevice

I am trying to create an 80ms pulse by setting a GPIO high, starting an application timer with 80ms timeout and then setting the GPIO low in the timer ISR. I am aware that it is a common problem when ... (more)

151
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1

I have a problem using ble_advertising_restart_without_whitelist(). According to the documentation (as I understood) it should start advertising without whitelist even if a whitelist exists (hence it skips BLE_ADV_EVT_WHITELIST_REQUEST). In the next call of ble_advertising_start() advertising should use the whitelist again ... (more)

56
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## Integrating DTM functionality into an app with softdevice

Hello, I am investigating the possibility of integrating the DTM functionality into our app (which uses the softdevice) to allow us to use a single image for production testing and deployment. What I am hoping to achieve is to allow ... (more)

82
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1

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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)

217
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2

## NRF52 BLE examples not working with gcc

After working with NRF51822, I decided to go for NRF52832, and I bought some modules that have NRF52. I am using GCC and SDK13. I installed the S132 soft device which is in "sdk13\components\softdevice\s132\hex" using NRFGo ... (more)

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## Power Optimized FreeRTOS? Any examples?

Are any of the freeRTOS examples Power Optimized? I've looked into other related posts but not sure anyone is seeing the same issues I'm seeing. I'm using a Rigado BMD300 and I can't get it to ... (more)

172
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## Can not find the device [closed]

Hi,

I am working on a custom design for NRF52832. The schematic and pcb layout are as follows. However, it seems that I can not get the signal working correctly. Would you please take a look and give me some ... (more)

101
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1
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2

## Unique Characteristics for each peripheral using Multiperipheral SD

I am developing an application in which my device will have multiple android phones connected to it. Currently I have it working with one peripheral and after having upgraded to SDK13, I am looking at adding more peripherals.

My device ... (more)

83
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## [dfu] nrftil pc_ble_driver_py.exception.NordicSemiException

Hi. I'm dfu test for sdk13.

NRF52832 EVM board nrfutil version : nrfutil version 3.2.0

D:\nordic_nrf52832>**nrfutil.exe dfu ble -ic NRF52  -f -pkg dfu_test_app_hrm_s132.zip -p COM8**
No target selected. Default device name: DfuTarg is used ...
(more)

67
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1
vote
1

## Run a function after successful DFU

I've looked through the Devzone, but couldn't find an answer to my question.

We are looking to automate the OTA process. When our nRF52 device is charging, it advertises as being ready for DFU. We can then connect ... (more)

801
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6
1

## freertos RTC issue in port_cmsis_systick.c [closed]

Hello,

Ported my FreeRTOS application on NRF52 from SDK 12.2.0 to SDK 13.0.0 .My application is using freertos apptimer for timestamping and waking up of device which was working without any issues on SDK 12.2 ... (more)

535
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3
3

## nRF52832 connection problem with some android device

Hi, I'm using nRF52832 with sdk 13.0.0(softdevice 4.0.2). I had trouble to connect nRF52 and some android 7.0(or upper version) smart device. I tested samsung galaxy tap 10.1 A6 (android 7 ... (more)

187
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2
1

Greetings,

I'm having some trouble using the secure DFU bootloader and buttonless DFU service in my application. The code for both of these has been taken from their respective examples in the 13.0.0 SDK. Our application code ... (more)

324
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1
vote
1

## spi master example code

hello , I am new to SPI protocol.I am using NRF52 DK &nRF5_SDK_13.0.0_04a0bfd( pca10040) using keil-5. I want spi master example code. Can any one suggested me where I find the spi master example code, Because I have ... (more)

202
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2

## UART not working on SDK 13.0.0

Hi. When i use ble_app_uart i have problem with my device over uart. It does not response to my commands.

I'm using custom pcb based on nrf52 with nrf UART v2.0 android app. Is there something i'm missing?

105
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1
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1

## DFU Update from SDK 12.2 to SDK 13.0 [closed]

As Bootloader IROM starting address 0x78000 and size 0x6000 is same in SDK 13.0 and 12.2.0 expecting to update Device firmware (BL+SD+APP) from 12.2.0 to 13.0.0 SDK.But in my case ... (more)

115
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1

## nRF52 as a DFU central

I can update firmware in my nRF52 nodes using DFU where on the other end I have Android phone or nRF Connect (PC/Windows)+PCA10040. Everything works fine. But in my application I want to use nRF52 based node ("central ... (more)

78
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## Good development flow from Example to production application

I would appreciate some suggestions on a good development flow to go from an Example to end application

I have nrf52832 on a custom PCB. I tested several sdk13.0.0 examples with 10040 and s132 I worked through the ... (more)

320
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1
vote
1

## Add security to service Characteristic

In the BLE Characteristics, a beginner's tutorial

Martin mentions: Since this is a beginners tutorial we will keep it simple and leave the doors wide open. No security, encryption, or passkey needed.

Is there an example to add security ... (more)

138
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2

## Can I create Characteristic with Notification only, no Read, no Write

I can remove the //char_md.char_props.write = 1; and only the Read and Notify Properties show up in MCP (or the iPhone)

When I comment out the char_md.char_props ... (more)

165
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## Is it possible to have passkey with Just Works bonding

I noticed some suggestions to add Static Passkey.

I have 10040 nrf52832 sdk13.0.0 s132

The server has no IO, so cannot enter passkey from it. 1) Is there an example to add PIN to the server, even though ... (more)

60
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## spi interrupt doesn't work in BLE event using SDK13.0.0

Hi,

I'm working on migration from project based on SDK12.1.0, 132SD3.0.0 (calling A project) to the one based on SDK13.0.0, 132SD4.0.2 (calling B project). I developed the project by adding codes ... (more)

71
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1

## Notify arrives late (timing problem)

Hey guys. We are using the NRF52 with SDK 13.0.0.1-alpha. If we connect the NRF52 to our own android or iOS APP we have some timing problems with notifications. When the smartphone is connected to the NRF ... (more)

456
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1

## Completed Code for BLE Services, a beginner's tutorial

Where can I find the completed source code for the BLE Services, a beginner's tutorial

I keep having trouble advertising, so either I am missing something, or have incorrect IAR setting.

Any help appreciated https://devzone.nordicsemi.com/tutori...

442
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2

## sdk13 buttonless dfu can't start bootloader [closed]

hi,dear engineers,

i use the example experimental_ble_app_buttonless_dfu of nRF5_SDK_13.0.0_04a0bfd, on the PCA10040 board,Now,i'm sure that I am flashed Softdevice,app,and bootloader,and the board work in the app.and well,the nRF connect ... (more)

185
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1

## nrf_serial vs. app_uart [closed]

I'm migrating to the new 13.0.0 SDK and I'm wondering what are the benefits of using nrf_serial over app_uart (if any) and what steps I would need to take to switch over if I choose to.

247
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## nRF Connect Scan Problem

Hi, I'm using nRF52832 Software Development Kit, PCA10040, S132.

In nRFgo Studio, I erased all my SDK. In nRFConnect, I selected serial port which SDK connected. And I saw a confirm message: No connectivity firmware was detected. Do you ... (more)

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