# 305 questions

Tagged
• x
27
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## "No source available" error after changing RAM start address

I've looked around and found similar questions, but nothing has really led me to an answer.

I'm working with the NR51 devkit, Eclipse, and SDK 12.3.0. I'm working on a system that should be able ... (more)

31
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2
1

I found out answers for calculating data rate during connections, which depends upon connection interval, no of packets allowed in each connection and no of bytes in a single packet.

However, how can I calculate data rate applicable during sending ... (more)

30
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## How to use TWI with BLE to transfer MPU6050 data

Hi,

I am developing on NRF51822 custom board but I had a problem on how to init TWI driver to communicate with MPU6050.

In short, when receiving a BLE_CONNECTED event I trigger a TIMER wih rearming every 2second. Within the ... (more)

33
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2
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Can a BLE peripheral listen for scan requests or any commands from BLE central without making any advertisements? If this is possible, then it would save on the transmission power required for sending advertisements.

Also, can a BLE central send ... (more)

30
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2
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## Error 0x3401 on sending advertising packets

Hello,

I am currently working on project that uses BLE peripheral and BLE central for automatic sensor calibration on custom board. There is an initial connection where both central and peripheral connect and successfully communicate data on notification characteristic from ... (more)

32
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2
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## NRF52832 - real time tasks(CAN Open)

Would it be advisable for system design to use CAN(CAN Open) and BT simultaneously on nRF52832 IC?

Why this bothers me is because capabilities of nRF BT MCU's are growing both in processor power and memory size, but ... (more)

33
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## Why am I uploaded an application through UART, but the application does not run when the device is reset.

I debug the DFU Bootloader through UART,I am sure the APP code is complete updated,but the application does not run when the device is after bootloader to auto soft reset,but,the power on reset or pin reset ... (more)

61
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1
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1

## NRF_ERROR_NO_MEM [closed]

Hi,

I'm developing a FW with a lot of services and characteristics. Since I added the ANCS service, I have the "NRF_ERROR_NO_MEM".

Configuration : NRF51822_XXAC / S130 V2 / custom secure bootloader + DFU / Segger embedded studio / bootloader setting file to allow programing ... (more)

59
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## UART communication without CTS RTS.

Hello,

I am using nRF51822 and an STM32 communicating over UART. I want to test UART communication without CTS and RTS so I did the configuration as shown below:

static void uart_init(void) {

uint32_t                     err_code;
const app_uart_comm_params_t comm_params =
{
BLE_USART_RX_PIN_NUMBER,
BLE_USART_TX_PIN_NUMBER ...
(more)

34
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## ds18b20 for nrf51822 in keil [closed]

one wire library for nrf51822 With example tnx

73
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1
vote
2

## NFC not working on payment readers

Hi all,

I am using SDK13 with NRF52DK. I am trying to get NFC to work with a reader and encountered some problems.

I have tried 3 different examples, record_text, writable_ndef_msg and wake_on_nfc. They all work properly with an android ... (more)

62
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1
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1

## s110 vs s130 for SDK11

i am total beginner to the nrf51822. i am going through the nan-36_v1

app note is using s110 but i can't find that soft device in sdk ? is there any changes has to be done if i followed the ... (more)

50
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2

## sd_ble_enable return error 18

Hi

I use SDK version 12.2.0 to do a project. I add two 128bit uuid into my project. The one of 128bit uuid is created by myself. The other one of 128bit uuid is used ancs by SDK ... (more)

50
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## Advertising with device_name Vs whitelisting

I am confused with whitelisting and advertising/scanning with device name

I have a peripheral and a central device, peripheral device is advertising with device name set as 'PERIPHERAL_DEVICE' and my central device is scanning for the name 'PERIPHERAL_DEVICE' (m_target_periph_name ... (more)

46
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1

## DFU update from SDK 11 to SDK 12 - app and bootloader

Hi

I have working application on SDK 11, contained with bootloader, softdevice 130 and application using BLE. Is it possible to upload new application and softdevice from SDK 12 to exisiting via DFU? I know that legacy bootloader can not ... (more)

49
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2
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## How to trigger DFU OTA ? (for custom application with dfu services enabled)

I have merged all the 4 file's together (app.hex, app_valid_settings.hex, softdevice.hex and dfu.hex). Then I uploaded the custom app with dfu services enabled using nrfgo Studio. (Custom app = UART example) The board starts advertising and ... (more)

78
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## How to make nrf51822 generate advertising one time(just one time) and then disable the advertising?

Hi dear all: The question as the title says, Thanks in advance !

128
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1
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## How to create a whitelist on the Central device

I want to create a whitelist on the Central device. Because there is a lot of peripheral devices around and I just want to connect one peripheral device. First I register the address of the central device to the peripheral ... (more)

106
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1

## Unwanted reset

Hi, I'm working on a firmware that is used in a nrf51822. I discovered an unwanted behavior of my system. When the system is in power_manage mode, it can wake up in two different ways:

• pressing a button
• waiting ...
(more)

111
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3
1

## Nrf51822 custom PCB BLE not detecting,but rest of the GPIO is working

GerberVINR-178.zip

SchematicVINR-178.pdf

Bottom layer

Top Layer

IC on the PCB is marked as follows: nrf51822 QFAAHO 1627WM. I am able to program the custom board from nrf51dk through SWD programming.I have enclosed the custom board's schematic ... (more)

42
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## iOS Device show Peripheral Name as DFUTarg after Doing DFU ?

Hello,

I am able to get NRFtoolbox dfu code work for iOS 10.3. and now able to perform the DFU on BLE device.

But when I perform the DFU its GAP name changes from Beam to DFUTarg and it ... (more)

26
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## ble_app_uart packet not sent more than 278 packets [closed]

I am testing ble_app_uart. Softdevice is S130 and SDK is nRF5_SDK_12.2.0_f012efa.

My development board is Waveshare's NRF51822 Eval Kit.

When I test the ble_app_uart firmware, I cannot send more than 278 packets to ... (more)

57
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4
1

## Interaction between sd_ble_gap_adv_start and sd_ble_gap_scan_start?

Hi everyone,

I'm using a custom wrapper (https://github.com/sandeepmistry/ardu...) with softdevice S130 v2.0.1. I've extended the wrapper to allow simultaneous advertising and scanning, by calling both sd_ble_gap_adv_start and sd_ble_gap_scan_start.

This works as intended ... (more)

48
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1
vote
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## Using the SDK 11 with NRF6310 [closed]

Hello, I'm working with the NRF6310 Motherboard and play with it a little with SDK 6.1, but i want to create profiles with the Bluetooth Developer Studio, so I started using the SDK 11.0 and test with ... (more)

39
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1

## Bluetooth stops working after integrating ble_nus service

Hello developers, I am trying to integrate ADC, TWI based MPU6050 for accelrometer with ble_nus service for data transmission. The ADC and MPU6050 works perfect but once I integrate ble_nus the code compiles but my NRF51 DK does not advertise ... (more)

183
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1

## HCI interface

Is there a HCI interface according to BT-SIG requirements?

135
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3
1

## Softdevice vs non-Softdevice

Hi,

I would like to know which is the difference between using a Softdevice or not.

Looking at the blinky example, the two versions are provided. The "main.c" file is the same for both and the only different files ... (more)

57
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2
2

## How Can I limit Gatt Data bytes that I write? (Not With Zero-Fill)

I created an characteristic that has MAX_Length = 20 Bytes characteristic.

And When I'm trying to write less than 20bytes on this Characteristic, It Always send with 20Bytes with Zero filled data bytes.

For example, I'd like to write ... (more)

32
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## sporadic hardfault on nRF51822 SDK9 S130

Sporadic program restart from main. I suppose, it is hardfault exception. How can I catch it?

Check pls my memory settings. ROM: start- 0x1c000 size 0x23000 RAM: start- 0x200028000 size 0x5800

stack and heap I changed to 1024 for each ... (more)

55
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2
1

## In GATT Packet transfer, is there occurs any packet loss and retrial?

In GATT Packet transfer, is there occurs any packet loss and retrial?

I'm trying to connect about -90 Rssi dBm peripheral device with my nRF51-dk.

In this far range, does it may occur with packet loss in this far ... (more)

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• Resolved questions: 9857
• Total questions: 23725

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