# 23,073 questions

5
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## NRF51822 to NRF51822 Over the air update (DFU)

Hi

am working on a project and I need to have one NRF51 chip update another NRF51 chip, how can I go about this?

thank you

4
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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)

10
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The micro-ecc works well when I load micro_ecc_lib_nrf52.lib in keil5. However, the author suggest copying the uECC files into the project, so I include uEcc.h but fail in compling. I get some error information,such as: ............\external\micro-ecc ... (more)

6
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## NRF24L01+ Minimum order quantity

Hi, looking at the datasheet for the nRF24L01+, it lists four different ordering codes, each with a different minimum order quantity and/or different container. What is the difference between them. I don't mean MOQ and container, because that ... (more)

7
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1

## Can I use MDBT40 with ATMEGA328 ?

I have seen exaples using the Raytec MDBT 40 with ATMEGA32U4 infact adafruit has its own board with ATmega32u4 and MDBT 40.

Can I use MDBT 40 with ATMEGA328 ?

11
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## How do I know if my CCCD handles is set and how many CCCD handles usually are there?

Sorry that I'm asking 2 questions in one go, but they are closely related.

Problem: got 0x00000008, INVALID_STATE error when calling sd_ble_gatts_hvx, looked it up, it's most likely CCCD not set.

The thing is I've been migrating ... (more)

15
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## how to set ram size in keil for nrf51822?

hello, i am using ble_uart_app project in that i have added the pwm feature and added my code. i have tested my code seperately it works fine but when i have added in the ble_app_uart folder my ble connection getting ... (more)

15
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1

## nRF51 S110 v8 buttonless DFU-OTA

Hi, I am facing issue on nRF51 s110 buttonless DFU. We are initiating DFU using nRF Connect and the device jumps from app to bootloader. On my Android Phone using nRF Connect I can see the DfuTarg. But nRF Connect ... (more)

81
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## how to make communication between two stm8s+nrf24l01 (ie.one(stm8s+nrf24l01) as transmitter and one(stm8s+nrf24l01) as receiver)?can anyone help

hello , i am trying to make communication between two (stm8s+nrf24l01) modules for which i am using this link http://zewaren.net/site/node/110, by this code i am able to transmit data from one side and receive data ... (more)

35
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1

## how to use pwm feature in ble_app_uart

hello, i am using ble_app_uart code and in this pwm is also used but when i am enabling pwm my bluetooth connection gets disconnected. will you please tell me how to use pwm feature in the ble_app_uart. Pallavi.

11
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1

## Use app_uart_put() to send data

After I add uart function to ble_example, I use app_uart_put()to send data,but data only one byte.What can I do?My board is nRF52-DK.SDK is nRF5_SDK_11.0.0_89a8197.This is my code main.c

19
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1

## Additional equipment for nRF52840-PDK ?

I am a student and very new with your product and how to use it.

I just order nRF52840-PDK today via online electronic store.

Please provide complete equipment list that I really have to buy for getting start development from ... (more)

11
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1

## OOB pairing via NFC

Hi, I want to OOB pair two equal devices (pca10040 + NFC shield) via NFC. Since its not clear which of the two devices will act as NFC initiator (active) or tag (passive), I think I need to use P2P NFC ... (more)

27
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## How can i update a firmware in nrf52832 (PCA 10036) board ?

I am new in nrf52832 . and i can not uploading soft device this controller in nrfgo studio .Every time it provide a firmware upgradation issue .so how can i solve it . And after starting of firmware upgradation but after few ... (more)

36
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1

## how do I change PWM port to 1 on example "low_power_pwm"

Hi, I have Design a new product based on the NRF52840 I am trying to get the lcd up and running so first thing is the pwm for the backlight. I am using pin 1.08 for the pwm. but ... (more)

48
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2

## Nuttx port question on SVC handler

Hi Nordic,

I'm porting hrs application on nuttx OS. But when I call sd_softdevice_enable function, it goes to "RESET". I read below article which mentions that SVC handler is in soft device, but my coworker said that we have ... (more)

11
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## How to return BLE peripheral's connection status

I'm writing an Android application that connects to various BLE peripherals including the NRF51 and NRF52. I don't know if this question is appropriate for this site, but here it goes.

I noticed that the method onConnectionStateChange() from ... (more)

521
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2
2

## Programmer for NRF51822

Hello,

I just purchased this device: https://www.aliexpress.com/item/J34-F...

but found out that evaluation board is only a debugger and does not actually program the board.

Before I buy, I just wanted to make sure that the ... (more)

49
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## nRF52832 BLE HID Mouse Win 10 Driver Error

Nordic_Mouse.pcapngconnect_to_phone.pcapngtest_ble_mouse_1.pcapngtest_ble_mouse.pcapngHoping someone here can help. The setup is a Sparkfun nRF52832 Breakout Board programmed with Arduino BLEPeripheral Library Example: "HID_test.ino" as is. Win 10 PC tries to pair for few seconds ... (more)

8
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1

## what should be the build setting for keil for nrf52 EVB?

dealing with nrf52 and trouble programming with Keil

36
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1

## undefined reference to _start'

Hi,

I am getting the following error at the end of build when linking everything together

/home/sj01/Nordic/ref_app/../hal/nordic/components/toolchain/gcc/gcc_startup_nrf52840.S:280: undefined reference to _start'

that file line 280 is as follows: gcc_startup_nrf52840 ... (more)

34
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1
vote
2

## nRF51_SDK_7.1.0

where can I find this?

3
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Hi, I need to set dynamic advertisement data with nRF8001. To achieve this with nRFgo Studio my idea was to set "Service Data" in "Selected fields to advertise" (ACI Bond for example) within GAP settings, create characteristic with property "Set ... (more)

36
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2

## nRF52832 ANTENNA

Hi,

so i was using the NRF51822-QFAC with an external balun and this antenna chip 2450AT43A100E .

now i want to move to the nRF52832 chip and from what i read is that the balun is integrated into the chip which ... (more)

7
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## how to use whitelist in ble_app_hrs_c?

S130, SDK 12.3, ble_app_hrs_c example. I want to use whitelist function in this example but I can't finish it.

When I run peer_list_get(), it gets all 0xFF, means that there is no peer in flash.

So I use ... (more)

7
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## how to use whitelist in ble_app_hrs_c [closed]

S130, SDK 12.3, ble_app_hrs_c example. I want to use whitelist function in this example but I can't finish it.

When I run peer_list_get(), it gets all 0xFF, means that there is no peer in flash.

So I use ... (more)

11
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1

## how can i know 51822 ESB PTX sent packages successfully without ack?

hi

I am using ESB_DPL protocol between 51822 and 24LE1, and i used the sdk 12.2 examples/proprietary_rf/esb_ptx.

In my case, 51822 sent some packages with PTX mode, and did not require ack by 24LE1. i know if ... (more)

23
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1

## Putting the nRF51-DK to sleep periodically

Hi,

I am using the capacitive sensing driver example given in the SDK(version 12.3) and it works fine. I want to extend the code to ensure that the SoC goes to sleep for 60 seconds and then wakes ... (more)

19
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1

## Clarify is_conn_params_ok() function

While investigating connection parameter handling, I noticed the following:

The is_conn_params_ok(ble_gap_conn_params_t * p_conn_params) function in ble_comm_params.c only compares the interval, not the slave latency or connection supervisory timeout. This has the effect of the peripheral accepting connection parameters with ... (more)

10
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## Ble DFU Service

Hi

is BLE DFU Service a custom service and free to use? Or do I have to pay a fee and do measurments if I wanna use that service?

Thanks

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## Recent questions

• ### NRF51822 to NRF51822 Over the air update (DFU)

Posted 2017-06-25 16:25:45 by wogisha
• ### Advertising with device_name Vs whitelisting

Posted 2017-06-25 14:39:12 by raju