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Last activity 2018-01-11 00:28:20 +0200 by AmbystomaLabs flag of United States

How to use multiple timers

I have a device that I need to control, that needs 2 different square wave signals of different frequencies (although they may be multiples of each other), one at around 4 MHz and one at 10 KHz. Additionally (while the ... (more)

1k
views
3
votes
3
answers
Last activity 2018-01-10 16:18:10 +0100 by Suraj

nRF51822 Equipment Type Approval (INDIA) for a deployment next week

Hello Folks

I would highly apprciate if anyone can point me in the right direction here

After lot of consultation we imported a smal size shipment (of about 1000 nRF51822 based beacons) to India. We have a delivery / deployment commitment ... (more)

30
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no
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no
answers
Last activity 2018-01-09 10:50:21 +0200 by liu

NRF51822 adv stop and restart in beacon mode

hello, I want to make a beacon with NRF51822 chip. But now i have a trouble: In normal working mode, after i stopped the advertising with sd_ble_gap_adv_stop() ,i cann't restart it with advertising_init() and advertising_start(). The chip is restarted every time.

59
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no
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no
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Last activity 2018-01-08 23:16:59 +0100 by Matheus Xavier

Connection problem Nrf51822 Smart beacon kit and ST-LINK V2 (serial communication problem)

I have a nRF51822 smart beacon kit and a ST-LINK V2. I read the documentation found on nordic's website, downloaded all the programs that the documentation requested etc. Unfortunately I can not connect to it on the computer, I ... (more)

57
views
2
votes
1
answer
Last activity 2018-01-08 17:29:35 +0100 by Petter Myhre flag of Norway

Flash life cycle

Hi guys,

Currently, I am developing a application on nrf51822 which requires writing values on flash to store in case of power down. However this values need to be updated frequently. Because this is just a small value, I just ... (more)

58
views
no
votes
1
answer
Last activity 2018-01-08 14:32:34 +0100 by Bjørn Kvaale

nrf51822 mesh SDK v1.0.0 compile warning

I download the mesh sdk from: http://www.nordicsemi.com/eng/nordic/Products/nRF5-SDK-for-Mesh/nRF5-SDK-for-Mesh/62377 Compile the light_switch/server project for nrf51422_s130 with SES, got the warning:

Linking light_switch_server_nrf51422_xxAC_s130_2.0.1.elf
cannot find entry symbol reset_handler; defaulting to ...
(more)

60
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no
votes
1
answer
Last activity 2018-01-08 10:31:49 +0100 by Martin Børs-Lind flag of Norway

How to design the matching circuit from ANT1/2 to 50 ohm?

Hello, I am useing NRF51822-QFAC in my BT bridge project; Now I need to design the matching circuit; there was some recommended matching circuit in the datasheet(11.3--11.10)(Picture2 in attachment); But the reference PCB (picture1 in attachment ... (more)

73
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no
votes
2
answers
Last activity 2018-01-07 21:08:44 +0100 by Nguyen Hoan Hoang flag of Canada

nRF51822 QFAA resets when connecting to it

As the title says, I'm having problems connecting to my device with my custom board and I don't know what else to do. This is my Layout:

image description

Whenever I upload my firmware to the nRF Kit it works ... (more)

45
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no
votes
1
answer
Last activity 2018-01-05 09:49:33 +0100 by chocol8

NRF51822 Lower Power Mode with RTC wakeup

Hi,

I have a question that Product Specification v3.1 of nrf51822 describes Flexible Power Management: 2.6 μA at 3 V ON mode, all blocks IDLE. But, in the same place, NRF52832 describes as follows: 1.9 μA at ... (more)

12
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no
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no
answers
Last activity 2018-01-04 20:49:54 +0200 by Mark Freeman

Is Direct Test Mode supported for nRF24LU1+ in nRFgo Studio?

I didn't see reference to it in documentation nor in the application help files.

56
views
2
votes
1
answer
Last activity 2018-01-04 18:34:34 +0100 by Turbo J

Is it possible to underclock my nRF51822 to save power?

I am working on an nRF51822 central BLE device. I am wondering if it is possible to lower the clock speed / underclock the device to save power? I know this will make it run slower, but it already is running ... (more)

68
views
3
votes
2
answers
Last activity 2018-01-04 17:42:15 +0100 by Hung Bui

Will using a whitelist reduce my power consumption scanning on BLE

I have a central device that uses BLE to scan for a specific device (there is only a single device it can bond with). Right now it checks the UUID and the mac address of all peripheral devices it finds ... (more)

26
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no
votes
2
answers
Last activity 2018-01-04 13:45:57 +0200 by Joakim Jakobsen flag of Norway

How to retrieve existence data from BLE device in iOS?

I would like to get data from BLE device and I have two services are available in BLE device which is offering in 3 characteristics and 2 characteristics.

Can u share any source code which is used to get data ... (more)

55
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no
votes
no
answers
Last activity 2018-01-03 12:59:58 +0200 by Petter Myhre flag of Norway

ble disconnect

I am using nRF 52832 (softdevice v2.0). I am writing a code to get data via SPI and then transmit over BLE.

I have written my code and SPI is working perfectly.

But the connection with the BLE gets ... (more)

14
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no
votes
1
answer
Last activity 2018-01-03 12:35:37 +0100 by Martin Børs-Lind flag of Norway

as5601 integrated to nrf51822

Hi alll,

I wanted to use a encoder for measuring rotary motions. so i kept a magnetic encoder named AS5601 which uses I2C communication and i have never done anything on this communication protocol before.

Any help for code is ... (more)

22
views
no
votes
1
answer
Last activity 2018-01-03 12:17:45 +0100 by Nitin

nrf51822 UART Problem

Hello all,

I am new to nRF platfrom, I am working on a protect which contains multiple BMD-200 modules with nRF51822 controller. It has to transfer some data via UART, I started of using example code and writing the values ... (more)

53
views
no
votes
1
answer
Last activity 2018-01-03 10:57:31 +0100 by Rick Chung

mesh SDK add SIG model

I added a SIG general onoff model by modifying nordic mesh SDK example project 'example/light_switch', just modified model ID as below:

client:

#define SIMPLE_ON_OFF_CLIENT_MODEL_ID (0x1001)

server:

#define SIMPLE_ON_OFF_SERVER_MODEL_ID (0x1000)

other:

#define ACCESS_COMPANY_ID_NORDIC (0xFFFF)//as ACCESS_COMPANY_ID_NONE for SIG model

Then ... (more)

60
views
no
votes
1
answer
Last activity 2018-01-02 15:48:17 +0100 by Joakim Jakobsen flag of Norway

NRF51 obsolete

I heard that NRF51 familey is becoming obsolete and the NRF52 replaces tham is it true because we have a product the uses NRF511822 and we want to make another product using the same processor.

Thanks

48
views
no
votes
1
answer
Last activity 2018-01-02 13:10:51 +0200 by Jørgen Holmefjord flag of Norway

32-bit ieee-11073 FLOAT data type parser

Hi,

Is there and C/C++ source code to get float value from 32-bit ieee-11073 FLOAT data type

I need c/c++ code to parse 32-bit ieee-11073 FLOAT data coming from FORA IR20b Thermometer.

Please reply. Brajesh

41
views
no
votes
1
answer
Last activity 2018-01-01 09:39:50 +0200 by RK flag of Singapore

Can we upload Codes to NRF51 Using NRF52-DK ?

Hi, I have NRF52832 development board and NRF51824 beacon board. I want to dumb the code to NRF51 but i don't know whether we can use NRF52 DK to do the same(Supply to NRF52 and connecting NRF51 to ... (more)

45
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no
votes
no
answers
Last activity 2017-12-30 11:00:39 +0200 by dhiraj_gehlot

Writing Data to Flash without Pstorage module

Hello Guys,

I am newbie to nrf51822 programming. Currently using nrf51822 (raytac's MDBT40) with S130, SDK11. I am programming the nrf51822 using arduino IDE using this github repo: https://github.com/sandeepmistry/ardu...

I want to store data such ... (more)

92
views
no
votes
1
answer
Last activity 2017-12-30 02:29:06 +0200 by aguedob

Newbie question with iBeacon Station NRF51822. Power consumption

Hi all,

I've bought an iBeacon Station NRF51822 like this one (http://linksprite.com/wiki/index.php5...). My idea is using it as a temp sensor for my smart home installation. It works fine but the battery is drained ... (more)

216
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no
votes
no
answers
Last activity 2017-12-29 12:43:59 +0200 by Torbjørn Øvrebekk

The conneted slave disconnects after some seconds after connection with the reason 8 "connection timout"

Hi averyone, We are developing the BLE project whith two devices master/slave.

The master device is built on the NRF52832 processor with SDK14.1 and it's program is built is the modified example "ble_app_hrs_rscs_relay" that has the two ... (more)

27
views
no
votes
no
answers
Last activity 2017-12-29 11:06:32 +0100 by CFF.K

How to setting ideal APP_TIMER_OP_QUEUE_SIZE ?

hi, My program used total 10 app_timers, like this APP_TIMER_DEF(connect_timer_id); APP_TIMER_DEF(scan_timer_id); APP_TIMER_DEF(standby_timer_id);

I don't know how to setting APP_TIMER_OP_QUEUE_SIZE ? (If 10 app_timers need arrange APP_TIMER_OP_QUEUE_SIZE ?)

Because I test app_timers. I arrange APP_TIMER_OP_QUEUE_SIZE=2 when I use ... (more)

45
views
no
votes
1
answer
Last activity 2017-12-29 08:15:35 +0200 by John

Custom HID over GATT device [closed]

Hi I've been testing HID example ("nRF51 SDK v9.0.0\examples\ble_peripheral\ble_app_hids_keyboard\pca10028\s110\arm5_no_packs") for a while.Now,I want to test Custom HID over GATT base on the keyboard example using the pca10028 DK.reference ... (more)

2k
views
2
votes
2
answers
Last activity 2017-12-29 07:09:39 +0200 by Nguyen Hoan Hoang flag of Canada

How to flash SoftDevice and Bootloader (OTA enabled) to nrf51822 by CMSIS-DAP programmer?

How to flash SoftDevice and Bootloader (OTA enabled) to nrf51822 by CMSIS-DAP programmer? For instance: I did cmsis-dap programmer with mbed code form github. Can I do that with Keil? Just set properly IROM1 and IRAM1 values? Is something similar ... (more)

60
views
no
votes
2
answers
Last activity 2017-12-28 22:30:28 +0200 by endnode

Getting started with nrf51822 modules and st-link.

Hello.

I'm tying to learn nrf51822. I had ordered some modules from ebay and nrf52-dk from local distributor . A week ago I had receive some modules. But local distributor says that nrf52-dk is late and won't delivered before ... (more)

45
views
no
votes
1
answer
Last activity 2017-12-28 11:42:47 +0200 by Martin Børs-Lind flag of Norway

nrf51822 rtc with softdevice

Hello,

Is there a demo project that contains RTC function with softdevice. I called the lfclk_config() and rtc_config() function before softdevice initial in main(), but it could not pass through SOFTDEVICE_HANDLER_INIT(&clock_lf_cfg, NULL). How can I sovle this issue, am ... (more)

45
views
no
votes
1
answer
Last activity 2017-12-28 11:34:55 +0100 by Faizan

Antenna selection

I am using nRF52832 , i need to connect external antenna with nRF52832 chip. I need 20 to 30 meter range. so which antenna is useful. and what is the necessary rule for connect the external antenna. Thank you in advance.

59
views
no
votes
1
answer
Last activity 2017-12-27 13:23:58 +0200 by Ole Saether

Read flash data using FDS

Hi guys,

I am using FDS module in nrf51822, sdk 11 to store and read data from flash. I have a problem about reading the data. In the documents, the function:
fds_record_open(&record_desc, &flash_record) is used to read data from ...
(more)

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  • Resolved questions: 11535
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