• factory reset nrf52-dk

    Hello Nordic, I've acquired several nrf52-dks and I use them almost exclusively to flash with nrfConnect on the PC. To learn more about nrf programming I started with Segger Embedded Studio, easy installation so far all right. Now I want to reuse…
  • Disabling saadc problem

    I am using nrf52832, SDK14 and sd 132.5.0. I want to disable SAADC after measuring battery level then enable again when I want to measure it again like in this post . When I try to do that it resets device every time in this handler. static void battery_level_meas_timeout_handler…
  • How to stay in bootloader in case of faulty app?

    Hello, I want to prevent a scenario where I successfully perform a DFU with a faulty firmware image. I have a bootloader that handles firmware updates both for the NRF5 itself and another external chipset. It once happened that we accidentally flashed…
  • DFU reset for part 2 / 2

    Hello, I have a bootloader with a low power wait for power button on startup. When I do a BLE DFU update of bootloader + SD + appli, the Nordic smartphone application cut update in two parts and it looks like it have to reboot at the middle. …
  • use initialized WDT after software reset on a NRF52

    Hi, well I struggle with another problem right now. In case of some errors, I use 'sd_nvic_SystemReset' to reset the system. But the WDT is used in the application. Thus, after restart, the WDT is still active. Is there any possibility to get or…
  • esb handler crash

    I am trying to use ESB and BLE concurrently on NRF51822 SDK v11 SD130.. The BLE part is working fine but the ESB part keep causing error randomly. I put a break-point in app_error_handler and found that this is related to nrf_esb_event_handler. I…
  • nRF52 spurious resets with SDK12.2.0 - How to resolve?

    Hello, we have developed a solar powered LED module with an additional battery. It is based on the nrf52832. The WDT and TWI is mainly used and for BLE the soft device is applied. From time to time, the NRF resets itself. I do not really know, how…
  • nRF52 not booting properly without reset

    Hi I did a bunch of boards for a product, and in the latest version I used a BQ25121 PMIC which also has a reset output which I tied to the nRF52 input. On the previous boards the reset signal was tied directly to a button and it worked. But now when…
  • Reset Pin malfunction in BMD301 based custom board

    Hey guys, I have designed one custom PCB based on BMD301 in which I am observing some weird behavior on RESET pin. I have connected reset pin of BMD301 i.e. P0.21 to 3.3 volt through pull up resistor of value 10k ohm. One push button is kept which…
  • nrfgo studio doesn't see my custom board

    Hello all, I am trying to program my custom board using the debug out from the nrf51-DK. I connect all the needed pins and on the nrfgo select the Segger but when I do this my nrf51-DK resets and it doesn't show me nothing. I already reinstalled…
  • when power-up NRF52 program does not start until reset

    The problem is exactly same with the topic. I have custom board for Beacon. At the beginning I soldered 5 boards and all of them was working perfectly. After few days, 4 of them started not to work. I tried to reprogram all and all 4 circuits worked.…
  • nrfjprog ---pinreset not working on nRF52

    Hello! I am using a custom board that contains a nRF52832 device. The board has the SWDIO and SWDCK lines connected, which I have successfully been using to flash and debug the firmware. However, I cannot seem to make the device leave debug mode. I…
  • nrf51 wont run without debugger

    Have an nrf51 board design that doesn't want to run without a debugger. When programmed, the debugger can run the board. When the debugger is removed, the board does not seem to run at all. The SWDCLK line has a 12k pulldown. The SWDIO line has a 12k…
  • nRF52832 and mbed compatibility

    We are designing an additional "mbed-host board" that makes our nRF52832 based sensor board mbed-compatible ("Aistin Blue-2" board, see predecessor e.g. at www.kionix.com/iot-evaluation-and-development-kit) . However, we are unsure whether the reset line…
  • nRF51 Custom board resets on button press.

    Hi, I am quite new to nRF51 development so please excuse me for my mistakes or not using right words if any. I have some code that fully works on the official nRF51 DK. I want to make it work on a custom board based on nRF51. Only IO pins are different…
  • spi transfer blocks BLE, causing nRF51 program to reset

    BLE is first initialised in my code, then SPI is initialised. If no SPI transfers are to be executed in the code, the code compiles, runs correctly and BLE functions correctly. When I send a message using SPI, the time to transfer this message blocks…
  • Power On Reset doesn't work

    I found a problem of the nRF51822 in boot state. Power on reset is not executed occasionally when used dying battery. The problem occurs in the following steps: Connect the dying CP2032 around 2.85 [V]. Remove it. Reconnect it when VDD…
  • nRF52 RESETREAS register

    I'm using an nRF52832 (QFAAB0) on a custom PCB, nRF5 SDK, S132 v2.0. I'm occasionally encountering spontaneous resets and want to tract down the source. I found the RESETREAS register and the SDK function to access it (sd_power_reset_reason_get). However…
  • Prototype Board with nRF51422 crashes on printf() statement in peripheral/Uart example.

    We have made a bare minimum prototype with nrf51422 QFN chip following the reference schematic for internal LDO setup in 11.5.1 section of nrf51422_PS_v3.1. It is built on a strip board with through hole components and nRF51422 on a QFN breakout board…
  • Problem when I send more than 8 packets

    Hello, I'm a few novice in BLE, and I've got a problem. I'm using a custom project based in UART example. I'm using Nexus 5 and nRF ToolsBox for text it. I'm saving the data in the memory. I can send packets of 20 bytes, but when I need send more…
  • nRF51822 reset during BLE connection/transfer

    Hello, in our application I can see, that sometimes the nRF51822 completely resets, during a BLE transmission. I am using S120 as peripheral. The peripheral is connected to a peer (smartphone). Now the central (smartphone) tries to send some data…
  • My device is freezing and restarting

    My device is either freezing or restarting, and i do not know why.
  • DFU: nRF51822 OTA bootloader jams after reset_prepare()

    I managed to upload my application OTA DFU when there was only the bootloader running. After my application is there, I can start DFU and my application runs thru reset_prepare() function as expected. However, it seems that it never enters the bootloader…
  • nRF51822 doesn`t execute hardware reset

    Hello, on our custom hardware design, the hardware reset won`t be executed after programming with nrfjprog.exe, until complete new boot with disconnecting Vcc. After reconnecting Vcc, reset works as expected. I have meassured the hardware pin. The…
  • SPI Slave CS resets nrf52?

    I am using the spi slave example code from SDK 0.9.2 and connect the board to an Atmel SAM4S who is the SPI master. I can see that every time the CS signal is released from the Atmel the nrf52 seems to reset. What could be the reason for that behavior…
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