• pairing failed

    Hi ,Nordics when I use my host device (reffered to the example of ble_app_hrs_c)to pair and bond with a peripheral device(a gamepad) ,the pairing failed .I don't kown the reason .And when I try to enable the cccd , it failed . I want to know why…
  • The device breakdown for several times,no matter what you do

    Recently,I confronted some particular circumstance that I have never came across. The device programmed used by Jlink and Keil,so I check the address of flash,it showed as follows. Then I readed the code used by NRFgo Studio, Obviously,this…
  • Unmodulated carrier and modulated carrier for the center frequency point

    Hi, for carrier and modulation carrier signal is confusing. What is the difference between their center frequency point for same frequency? Or modulated carrier will change center frequency? if it is,why? What is the difference between…
  • Current consumption on different BLE configurations.

    Hi, I have my 2 nRF51 running with S130 v2.0.1, one is the central and the other peripheral. I am transmitting audio data between both and want to reduce the current consumption to the maximum of my ability. 1st case: My configuration for the…
  • why should I clear event in the interrupt handler

    as far as I am concerned, when I use PPI or SHORTS without interrupts, I DON'T need to clear the corresponding event registers, and task will be triggered once the event is generated. But when I enable interrupt, I have to clear the event register, otherwise…
  • Timer not correct?

    Now,I use a 1s timer to calculate the clock. At first,I use the telephone to adjust the time to fit the telephone time. but finally(after a night ) the result runs fastly compared with the telephone. For example,the telephone time is 8:40,but the devices…
  • When downloading the application,is the NRF51822 chip of internal DC - DC is working correctly?

    When downloading the application,is the NRF chip of DC - DC is working correctly? 下载程序时,NRF芯片内部DC-DC 是否正常工作
  • How to create a new 128bit UUID services in the SDK10.0 ble_app_uart_c ?

    I am working in the SDK10.0 ble_app_uart_c(master),it can connect to ble_app_hrs(slave) successfully. But if I add a new 128 bit UUID named ACC_BASE_UUID different from NUS_BASE_UUID.After I power on the master device,it can connect to slave,but the…
  • The DFU failed when DFU to 99%.

    I use SDK9.0,SD8.0,the device is 51822AC,the device can enter to Bootloader mode. As it shows below. Then I selected the .zip file to start DFU But when it reached to 99%,the sequence happened. The system still run the old code. So I check…
  • 51822 in the absence of power supply, work

    Hi,I have a question. the PCA10005 board's P0.17(Or other pins) connected to 2.8 v voltage,but the Vcc is not connected,and the PCA10005 GND connect to 2.8V GND.The PCA10005 work(Uart transmit data),and the Vcc is 2.03V.Why ?
  • How to get 51822 cm0 cycle count?

    Hi Nordic expert, I wanna get a profile of 51822 performance cycle count. I found 51822 has no powerful DWT feature as cm3 or cm4, would you share me some feasible methods to do that? Are there some IDE tools can show this infromation? Thanks.
  • SPI SLave MISO High until buffers set

    I am working with the nRF51822 S110 and having trouble implementing SPI. In other devices' SPI protocols, MISO can be held high until the device is ready to transmit data. I want to bring MISO high and then set it low once the SPI_SLAVE_BUFFERS_SET_DONE…