# 1,603 questions

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## can't program nrf52832ciaa

can't program nrf52832ciaa

I can connect the core through segger commander

I can erase the chip after push the download bottom in the keil 5 ,and erase the chip

but I can't program , what's wrong ?

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## how to write a functions(program) for transmitting and receiving data over uart using nrf 51822?

Hi, there i am using nrf51822 to communicate with quectel ec25 .i want to send AT commands over uart and receive some response from quectel.for eg. i am sending a "AT" command i should get "ok" response in return ... (more)

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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)

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## trouble getting started with nRF52-DK

I have an nRF5- DK and I'm following this tutorial. I loaded the softdevice, I can compile, I can load the flash, I can see the output in Termite, I can change the code to print different information to ... (more)

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## Performing DFU with nRF Connect v1.8 Fails to Switch from App to Bootloader - Worked on 1.7.5

Since upgrading to nRF Connect on my IOS device the DFU won't reconnect to the BLE in the boot-loader after initiation from the application.

The device will migrate to the boot-loader and begin advertising but nRF connect doesn't ... (more)

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## iot stack compile for nrf52822

Hi,

I get following error when i try to compile nRF5_IoT_SDK_v0.9.x for target nrf52822

compiling x509_csr.c... assembling arm_startup_nrf51.s... <command line>(13): error: A1517E: Unexpected operator equal to or equivalent to < compiling x509_crt.c... compiling system_nrf51.c ... (more)

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## 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)

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## Set RTC in nRF52832

My application is built using the nRF52832 device. The system must only be "active" between certain times (5am through to 9pm).

I am a newbie and have no idea how to set the RTC of the nRF52832. I could either ... (more)

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## 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)

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## how to define gpio pins and generate pwm on gpio pins?

Hi There, i am new to nrf51822 and new to program this kind of controller.I searched over the website, I couldn't find a good introductory documentation for programming the nrf51822, specifically the nrf51-dk. i have two problems 1 ... (more)

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## 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)

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Hi everyone ! I'm working with nRF 52840. I've downloaded softDevice s140 using Keil. Afterwards, I selected the target to nRF52840_xxaa and then build the project of Heart Rate Application and tried to download the code, I get the ... (more)

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## How to turn on Leds only for advertising time?

Hi, i am using SDK v8.0 and in main function, initialization like this err_code = bsp_init(BSP_INIT_LED | BSP_INIT_BUTTONS, APP_TIMER_TICKS(100, APP_TIMER_PRESCALER), button_event_handler);  and

in advertising_start function, calling function is err_code = bsp_indication_set(BSP_INDICATION_ADVERTISING); this is working. but i want like this ... (more)

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## Where can i find nrf51822 firmware?

Anyone know how to put the nrf51822 firmware again? I made an update and deleted it from the kit. Where can I find it?

Thanks

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## How to use 10040

Hello , ebery one Please let me have a question about PCA 10040.

When you connect a USB cable, it acts as a virtual drive and if you copy hex format (such as Hart rate monitor) by dragging and dropping to ... (more)

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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)

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## how to interface tcrt1000 optical sensor with nrf51822?

Hi ,there i have tcrt1000 optical sensor wants to interface with nrf51822 so can anybody provide me the tutorial on this things with a code... cheers, Abhijeet

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## Has anyone used nf51 bluetooth with some app mobile?

Has anyone ever used nf51 bluetooth with the app inventor?

I have values ​​coming out of the microcontroller terminal. I want to send them to a mobile application using the app inventor.

But I do not know how to do ... (more)

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## Battery Power problem

I am using nRF52840 board. And I used keil and nrfjprog, both successfully flashed the hex file onto the board with USB connected. The example I used is ble_app_uart_c.

My program runs fine, but once I disconnected the USB cable ... (more)

39
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I have a app that stores some calibration information in flash (1 page at 0x7F000) When I booted now I noticed it has replaced it with "DEADCODE" following some hex number, what is this?

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## Any one can help me with source code of mpu9250 and nrf52 DK

As i am new i don't know from where i have to start if anyone help me with this it would be a great help to me

34
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## Symbol multiply defined

Hey all,

I tried to build my project in the Keil µVision IDE. But everytime I get the same error and I can't figure out where the problem should be. I searched for the multiply defined symbols but I ... (more)

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Hi all,

I'd like to pass bootloader version (2bytes) from bootloader_util_reset function (bootloader) to the main of application. can help me to acheive that?

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## Cannot open Source input file

I am a newbie to Nordic thingy and Keil. So please help me with this. I downloaded SDK and opened it in Keil. It asked for updating software packs update and it was done. When I tried to build the ... (more)

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I am getting random data while using saadc example to reading analog voltage applied to pin on nrf52840. i want to read analog output from MQ135 gas sensor, I have applied the voltage output from sensor to P0.06 and ... (more)

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Im using sdk 14.0 and s132 When i add flashwrite codes to my project which has bluetooth communication ,it does not work I wanna send data to flash and i wanna read/write it What is the simplest way ... (more)

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## start and stop advertising packet of every 5 min?

hi, i want to advertise packet every interval of 5min. how can i start and stop advertise packet.

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## RTC and nrf_timer2 with BLE SOFTDEVICE nRF51_SDK_8.0.0

hi, i want to use 2 timer in my application and BLE continuous advertising. i'm able to do with NRF_TIMER2 and BLE continuous advertising and it's working fine. but when i add RTC0 part in my code, it ... (more)

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## nrf52832 Central-Peripheral Connection

Hello,

I am using ndk52 (nrf52832) as peripheral and central in my system. I did some changes on ble-app-uart example for both. Now i can send my packets continiously. I am trying to change it little bit more. I want ... (more)

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HI,

I am using nRF51822 by Keil compiler. I found if it was programmed with boot loader nrf51422_xxac_s130.hex

by nRFGo Studio.

Then if download user code by Keil, it cannot run anymore. But if upload a zipped user code ... (more)

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