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26
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Last activity 2017-08-16 12:15:50 +0200 by endnode

Role of Central's Tx Power in connection with Peripheral

How does the Tx power impact the scanning and connection with a peripheral?

In detail, say if the peripheral can advertise at a Tx power of 4, 0 or -4 dB, then will it depend on the central's maximum ... (more)

26
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no
votes
1
answer
Last activity 2017-08-16 06:11:39 +0200 by RK flag of Singapore

BLE_ERROR_NO_TX_PACKETS

what is meaning of return value BLE_ERROR_NO_TX_PACKETS,when i use sd_ble_gatts_hvx() send data..

22
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-2
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Last activity 2017-08-16 02:24:54 +0200 by happykelvin

send data more fast [closed]

how to set the ble stack ,let the sd_ble_gatts_hvx() send data return more fast,now from i use sd_ble_gatts_hvx() to get the return (BLE_TX_COMPLETE) needed 300ms.

18
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-1
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Last activity 2017-08-15 13:51:29 +0200 by happykelvin

what facter will influence the speed of sending data [closed]

when use sd_ble_gatts_hvx() send data must need 300ms what facter will influence the speed of sending data ,please help me ,thank you very much

21
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-1
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Last activity 2017-08-15 12:43:56 +0200 by happykelvin

reduce send time [closed]

when i use sd_ble_gatts_hvx() send data , 300ms later the BLE_TX_COMPLETE is return ,why need so much time,how to reduce that time.

30
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1
vote
1
answer
Last activity 2017-08-15 12:07:34 +0200 by endnode

how to do to change the TX_BUFFER size

how many byte of the s132 ble_stack_TX_BUFFER size ,if i can change the size and how to do to change the TX_BUFFER size

24
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-1
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1
answer
Last activity 2017-08-15 11:21:44 +0200 by endnode

quickly get BLE_EVT_TX_COPLETE

when i use sd_ble_gatts_hvx() send data to ble stack, after 300ms later ,i get the ble stack event BLE_EVT_TX_COPLETE , how i can reduce the time(300ms), let the data send out more fast,and quickly get BLE_EVT_TX_COPLETE , because we must ... (more)

31
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2
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Last activity 2017-08-15 11:14:34 +0200 by ndarkness

Can I configure GPIOTE to debug my signals?

Hello,

I am using nrf52832 DK and I would like to use the GPIOs port to debug a couple of signals that I genereate within the MCU.

So far I have configured my GPIOTE module like this (I am using ... (more)

18
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-1
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Last activity 2017-08-15 11:11:15 +0200 by happykelvin

accelerate send package [closed]

how i can send data 1500byte per second,use the sd_ble_gatts_hvx(). because i send the first package use sd_ble_gatts_hvx() and 300ms later i get the BLE_EVT_TX_COMPLETE, the i send the second package, i want to reduce the time(300ms),let ... (more)

32
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-1
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1
answer
Last activity 2017-08-14 14:24:24 +0200 by RK flag of Singapore

one Thread use sd_ble_gatts_hvx() send many package

how to save a problem,if one Thread use sd_ble_gatts_hvx() send many package ,but i use vTaskDelay(50)( the freertos delay api ) when one package send ,then send another package . but
some packgae lost data .At the same time other ...
(more)

45
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1
vote
1
answer
Last activity 2017-08-14 12:46:07 +0200 by Jørgen Holmefjord flag of Norway

What is the right factor to convert voltate using SAADC?

Hello,

I am getting really confused when using te SAADC to convert the read values into voltages.

I have seen that the example ble_app_proximity() uses the following macro

#define ADC_REF_VOLTAGE_IN_MILLIVOLTS     600
#define ADC_RES_10BIT                     1024   
#define ADC_PRE_SCALING_COMPENSATION      6   
ADC_RESULT_IN_MILLI_VOLTS(ADC_VALUE)\
        ((((ADC_VALUE ...
(more)

41
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2
answers
Last activity 2017-08-14 11:01:33 +0200 by madblue

applications to plot ecg through BLE

Is there any applications which can plot ecg from data send through BLE ?

13
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no
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no
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Last activity 2017-08-12 05:38:12 +0200 by happykelvin

why haven't the BLE_GATTS_EVT_HVC return [closed]

if send data use sd_ble_gatts_hvx() ,why haven't the BLE_GATTS_EVT_HVC return

14
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no
answers
Last activity 2017-08-12 03:24:16 +0200 by happykelvin

p_ble_evt->evt.gatts_evt.params.timeout.src

when use the sd_ble_gatts_hvx() send data and printf() the value below

p_ble_evt->evt.gatts_evt.params.hvc.handle p_ble_evt->evt.gatts_evt.params.sys_attr_missing.hint p_ble_evt->evt.gatts_evt.params.timeout.src

use %d all the value is 17, i cann't what's meaning

34
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no
votes
1
answer
Last activity 2017-08-11 13:16:31 +0200 by Sigurd flag of Norway

how to increase Piezo buzzer sound

We are trying to modify SDK example pwm_library, we are able to generate minute sound ,how to increase the sound

11
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no
votes
no
answers
Last activity 2017-08-11 11:36:31 +0200 by happykelvin

how to save sending package lost data [closed]

how to save a problem,if one Thread use sd_ble_gatts_hvx() send many package ,but i use vTaskDelay(50)( the freertos delay api ) when one package send ,then send another package . but
some packgae lost data .At the same time other ...
(more)

9
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no
votes
no
answers
Last activity 2017-08-11 11:24:44 +0200 by happykelvin

how to save sending package lost data [closed]

how to save sending package lost data,when use sd_ble_gatts_hvx() send data

11
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no
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no
answers
Last activity 2017-08-11 11:13:41 +0200 by happykelvin

which package lost [closed]

my programer have many place use sd_ble_gatts_hvx() send data , if i get the BLE_GATTS_EVT_HVC ,how i know this return value return belong which use sd_ble_gatts_hvx(),how i know which data package lost

17
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answers
Last activity 2017-08-11 09:17:49 +0200 by happykelvin

send one package again [closed]

when i send many package from programer different place , the return ble_evt_tx_complete have many times. how i distinguish which the ble_evt_tx_complete reture is that place or other place return .

if i get the return value from the ble_evt_dispatch is BLE_GATTS_EVT_HVC ... (more)

36
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no
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no
answers
Last activity 2017-08-11 06:01:25 +0200 by happykelvin

sd_ble_gatts_hvx() send package lost data [closed]

how to handle the problem when use sd_ble_gatts_hvx() send package lost data

60
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no
votes
1
answer
Last activity 2017-08-11 04:50:34 +0200 by happykelvin

ble_gatts_evt_t return value

when i use sd_ble_gatts_hvx() send data ,but phone occure data lost ,what state or value will return in

ble_gatts_evt_t struct

33
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no
votes
1
answer
Last activity 2017-08-10 11:39:55 +0200 by Sigurd flag of Norway

crash happen when LED state change

Reference PWM_driver sample code, I set the customer status of the LED, And it also can change status by button,

 static void bsp_evt_handler(bsp_event_t evt)
 {
void (* const demos[])(void) =
{
LED_OFF,
    whiteTenSec,
    blinkyRed
};
...

Next step, I integration this to my BLE ... (more)

32
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no
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no
answers
Last activity 2017-08-10 10:57:51 +0200 by happykelvin

send package lost data

i want to send data according the ruture value , because we all the data send ruturn value ble_evt_tx_complete ,how i can distinguish difference channel'return value

31
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answers
Last activity 2017-08-10 04:16:37 +0200 by happykelvin

ble send data fail

now, i have a question: i have a buffer 100byte data to send, when i send data package via sd_ble_hvx() continus,delay 20ms after each send ,but it will lost some data , i must keep the speed to send ,because ... (more)

36
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1
vote
1
answer
Last activity 2017-08-10 00:04:24 +0200 by Roger Clark

Linking ble_app undefined reference to ...

HEllo,

I am facing and issue with undefined references for the linker. The compiler is able to compile, but I get linker errors like these

.../pca10040/s132/arm4/_build/ble_app_hrs_pca10040_s132.elf does not exist.Generating linker script ‘ble_app_hrs_pca10040_s132.ld’ Linking ...

(more)

45
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no
answers
Last activity 2017-08-09 17:25:59 +0200 by happykelvin

what is the channel id different from other ruturn value,

i want to konw ble evt struct 's content of meannig . i want to find what's the return value when packet send fail and what is the channel id different from other ruturn value,thank you!!

67
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no
votes
1
answer
Last activity 2017-08-08 11:27:07 +0200 by Hung Bui

SDK13 NRF_ERROR_NO_MEM at sd_ble_gatts_characteristic_add()

Hello, when starting a new project I took the nice Heart-Rate-Example which works fine at my PCA10040. Then I started to add services and characteristics by copying and adapting the HRS - I know that I will have to declare them ... (more)

18
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no
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no
answers
Last activity 2017-08-08 03:12:57 +0200 by muyang

52832 S132 twi error

hi, When I add twi in hrs, debugging found ERROR: Fatal, the program stays in

Ret_code = mpu_init ();      APP_ERROR_CHECK (ret_code);

Ret_code = 0x0D

23
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no
answers
Last activity 2017-08-07 22:07:18 +0200 by Renix

Setting in IAR to program nrf52832 without Power cycling

Is there a Setting in IAR to program nrf52832 without Power cycling

nrf52832 does not start after programming from IAR IDE, using J-Link

But.. For both With J-Link EDU, and J-Link Standard, it works if I use SEGGER J-Flash Lite ... (more)

30
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no
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no
answers
Last activity 2017-08-07 15:29:55 +0200 by DMS

nRF blinky application button press

We am improvising nrf blinky application, we have got stuck in a problem, after button is pressed from nrf52-dk code goes into forever loop and after a while connection is lost.

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