# 28,761 questions

425
views
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1

## Can't write on Peripherals memory of nRF51822 using gcc emIDE or Em::Blocks

I am struggling to figure out why I can't write on the Peripherals memory to set a function. In this case I am trying to write in the 0x4000250C which is UART0, PSELTXD (Pin select for TXD), but it ... (more)

252
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no
1

## Can I use some of the example code for nRF51822 on my custom board?

Hi, I am trying to code my nRF51822 on my custom board, however right now I'm having my doubt on using some of the example code provided in the SDK.

Essentially, I want to try sending a byte via ... (more)

191
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no
no

## Do I have to use external host MCU for 51422?

Do I have to use external host MCU for nRF51422? What can the ARM Cortex processor inside SoC 51422 do and cannot do?

I want to create a mesh network with hundreds of ANT nodes, each node can scan all ... (more)

112
views
no
3

## Can't upload attachments on Developer Zone

I have done this in the past with no problems using Chrome or Firefox.

But for last couple of posts, I have not been able to add attachments. It allows me to select my files, but when I submit, no ... (more)

520
views
1
vote
1

## NRF_UART0->ERRORSRC = 0xC - what does it mean?

Hi,

I'm porting a nrf51822 evaluation board 10001 tested application to a custom board. Part of the application is using UART interrupts to raise a flag and start data transfer through BLE. When i run the application on the ... (more)

350
views
4
3

Hi all,

My application gathers sensor data and uses the advertisement packet to broadcast the values (much the same as the nordic temp sensor example). Rather than having to have a separate timer which aligns with the advertise interval (which ... (more)

2k
views
2
1

## SoftDevice and TIMER interrupts

As per this thread: https://devzone.nordicsemi.com/index.... the SD stack takes care of HFCLK, however as fas as I understand HFCLK is also responsible for timers - now, when SD stack is in use/enabled and it takes care ... (more)

897
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1
vote
no

## S110 7.0.0 : Can I write my own MBR?

Hi

I am looking at section 9.1 of the S110 Softdevice Specification v1.3A and the release notes for 7.0.0-2.alpha where I see that an application now starts at 0x15000 which is to make room for ... (more)

327
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no

## S110 v7.0.0-2.alpha and sd_softdevice_forward_to_application()

Hi

S110 v7.0.0-2.alpha got released today.

In the release notes it says...

[b]The SoftDevice can now be configured to forward interrupts to one of several applications (FORT-815). This is done by adding a parameter to the ... (more)

508
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no
no

## TWI sticking in twi_master_read polling for NRF_TWI1->EVENTS_STOPPED

Hey all,

I have a custom board running a 51822 rev C0 chip connected to a TMP102 temp sensor over I2C. I was using the twi_sw_master.c to successfully talk to it in my main loop before I start the ... (more)

248
views
no
1

I program the nRF2727 module with the "Block readback of mainmemory" seleted using nRFgo studio tool. After that, I can still read out the content of flash. What's the root cause?

555
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no
1

## Set Read Property of Characteristic in nRFGO Studio

How to set READ property to a characteristic pipe through nRFGO studio.Actually i am not able to set READ property to any pipe.How can i do this?

Because i want iPhone to read value from this characteristic pipe ... (more)

970
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no
1

## Low power mode?

Hi All,

I am new to nrf51822. I need a much less powerful CPU than the 16MHz CPU, is there a way to slow down the CPU to save power?

Thanks

239
views
1
vote
1

## iOS nRF UART SKD 5.2

I have compiled the ble_app_uart sdk the nRF51 SDK_v5.2.0.39364. (see attached file) and I upload this app to my device using OTA .

I found it can work with my Android device but not the iOS device. I ... (more)

193
views
1
vote
no

## bulk/block data transfer

Does your new implemenation of BLE 4.1 support bulk/block data transfer? What data rate could be possible ? /Best Regards Kjell Bystedt

179
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no
2

## HW error on nRF8001

Im using custom board with nRF8001. I'm using Hello World example from GitHub. The nrf chip revision is C not D. When I connect the board to Arduino Leonardo the device start advertising. But I want to use external ... (more)

825
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no
1

## Dongle firmware?

I want to load a Blinky project to the AK board, and the dongle is used as a jlink, but I forget to move the jumper to the 'out', and the program is loaded to the dongle. Now the master ... (more)

1k
views
no
1

## nrf51822 SPI Slave not working

I have two custom boards with nrf51822 QFAAG0 1348AC chip. I use 16 MHz crystal. Bluetooth functionality is working fine but SPI does not work. SPI pins are P0.00 ( MISO ), P0.01 ( MOSI ), P0.02 ( SCK ), P0.03 ( SS1 ... (more)

181
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no
1

## searching for BLE example project: nrf6310 nrf6310

Hello,

I am searching for an exampleproject to learn how to connect to motherboards (or an evaluation board) over bluetooth:

I try to send data from on chip (nrf51822) to another on and want to send that data via UART ... (more)

1k
views
no
2

## NRF51822 CONSUME with using the Softdevice

Hi

I ran the example " ble_app_hrs ".  the consumption is 1.5mA, when I  hold SWCLK and nRESET low,the consumption is fall to 0.9mA. how I could reduce the consumpion??


126
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no
no

## Where to get the matching configuration and how to measure the current on every status?

Hi,

1. I use the nrf51422 chip.I want to know if the ANT establish link between chips,where can I get the matching configuration (like device type、channel ID).I mean is there a register or a function that can ...
(more)

209
views
no
no

Hi,

I change the example ant_broadcast to acknowledge mode, but it seems that without a peripheral side,the LED0 will still twinkle.I don't know how to change the project so that only with a receiver will the sender ... (more)

371
views
2
2

## how nRF51822 ESB Protocol datarate reach?

when I use nRF51822 ESB Protocol,I set retransmit delay = 600us,anything else is working

good,communication is very well,but the minimal Tx period is 1.2ms,not 600us,why?

If the minimal Tx period is 1.2ms,the ... (more)

323
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no
no

## Performance of GATT

Is there a way to recieve more than one write callback for a given characteristic, per radio session? It seems like I can rx 1 time per attribute per radio session and tx up to 8 times per attribute per ... (more)

672
views
no
1

Is there anyway to limit the number of channels a device is advertising on?

I'm using an nrf51822 with the S110 stack and want to limit my device to a single advertising channel (just 37, instead of 37, 38 ... (more)

692
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no
7

## Compatibility table for nRF51422

Is there any compatibility table for nRF51 series chips with revisions, softdevice versions and SDK versions?

I have some custom boards with a module that contains a nRF51422 CEAA A0 (0x0031) and although I can reprogram the softdevice downloading the ... (more)

271
views
no
1

## can not creat my own characteristic

HI ALL i have successfully creat my own service referring to the example ble_app_lbs and reference nAN-36. but when i tried to creat my own characteristic in my service, it did not wrok(the device became unable to advertise, and ... (more)

901
views
no
2

I posted this on the Keil website, but got no answers! I would like to use one of my ULINK 2 pods to develop my application. However the Keil interface defines a reset connection. As we all know, the nRF51822 ... (more)

512
views
no
2

## How to send LL_CONNECTION_PARAM_REQ from slave

Hi,

I want to change the GAP params such as connInterval, slaveLatency, and have some questions:


1.can I call sd_ble_gap_conn_param_update directly or need to send LL_CONNECTION_PARAM_REQ first and wait for the BLE_GAP_EVT_CONN_PARAM_UPDATE event? a. If need to send LL_CONNECTION_PARAM_REQ ... (more)

582
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no
2

## How to migrate FATFS on nRF51822?

I want to store data more than one page on flash, and modify it very often.

pstorage or Fatfs? and how?

Thank you!

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