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16
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Last activity 2017-04-21 10:49:12 +0200 by Jordi

Hardfault when using both UART and GPIOTE, how can I solve this problem?

Hello,

I feel like this question has an answer similar to this question, but I can't seem to get it working https://devzone.nordicsemi.com/questi...

I am using the nrf51422 chip on a board I designed myself and ... (more)

78
views
1
vote
2
answers
Last activity 2017-04-20 17:23:25 +0200 by Stian flag of Norway

Is it physically possible to set UART RX and TX to same GPIO pin?

I'm trying to implement send && recieve through one wire. Handling of pin state, if it is input or output is done via SW. Also it is going to be half-duplex only.

Is it possible to do something like this ... (more)

69
views
2
votes
2
answers
Last activity 2017-04-20 03:21:16 +0200 by xeem

Setting MTU Above 64 bytes Crashes ble_app_uart

Hi all,

I am trying to send a large stream of bytes(60kb) to an NRF52823 using bbowl. BBowl exposes the uart through a TCP socket connection using noble.

I modified the gatt_init code in SDK13 to support the largest ... (more)

48
views
1
vote
1
answer
Last activity 2017-04-18 13:05:42 +0200 by Bjørn Spockeli flag of Norway

SDK 13.0.0: Secure serial DFU without flow control

I am using a bootloader based on the secure serial DFU bootloader example in SDK 13 and tested it on a development kit. I noticed that hardware flow control is enabled in both the bootloader code and the nrfutil Python ... (more)

626
views
6
votes
3
answers
Last activity 2017-04-15 19:32:35 +0200 by Khalid

How is the RTS-pin controlled in UART with flowcontrol

I am using a nrf52832 to communicate via UART to a GSM module (AT commands).

I have setup the device with a baud rate of 9600 and using HW flowcontrol. The nrf52 is doing other stuff at the same time ... (more)

58
views
no
votes
3
answers
Last activity 2017-04-13 12:21:42 +0200 by RK flag of Singapore

Is it possible to refuse a connection from a central device?

I'm developing a project based on the Nordik UART Service and I wouldn't use pairing as in the example.

However I have some problem when a central device is already connected to my nRF52, if I try to ... (more)

37
views
no
votes
1
answer
Last activity 2017-04-12 23:12:13 +0200 by tvdstaaij

Debug why DFU start packet not starting DFU

Firstly, platform: Sparkfun 52832 breakout board, DFU using UART, flashing an application, using nrfutil.

The problem fundamentally is the nRF52832 is not sending an ack that it received the DFU start packet. The packet is formatted correctly as defined by ... (more)

27
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1
vote
1
answer
Last activity 2017-04-11 08:31:07 +0200 by Jørgen Holmefjord flag of Norway

Do I have any restriction with HW Pinout Peripheral when using s130?

if I use softdevice 130 Enabled, then do I have any restriction with using all of the pinout of NRF51xxx?

Or if I use Nrf-51 DK, Do I have any restriction with nrf 51xxx's full pinout functionality?

To Make ... (more)

65
views
no
votes
1
answer
Last activity 2017-04-10 14:29:21 +0200 by Jørgen Holmefjord flag of Norway

How to read manufacturer specific data

Hi, i'm working a BLE gateway with NRF52DK and S132 by using the demo example central uart.

The peripheral equipement advertise manufacturer data like this: 0x0001 during 5sec then 0x0002 during 5 sec and stop advertise.

But I want ... (more)

25
views
3
votes
1
answer
Last activity 2017-04-06 08:52:21 +0200 by shravani

ble app uart example led not blinking [closed]

hi i flashed s110 softdevice 7.1.0 then ble_app_beacon example application fron sdk 7.1.0 into nrf51822 beacon successfully.but led is not at all blinking in beacon.and i can not detect that in nrf uart app.

50
views
1
vote
1
answer
Last activity 2017-04-05 05:32:59 +0200 by Daniel T. Lee

does UART is interrupted by BLE SEQUENCE?

Q0. What IRQ Priority does BLE Has? and also what IRQ Priority does UART can have?

I'm guessing that from s130's document P65, Exception Model, It says,
Softdevice Timing Critical has Cortex M0 priority 0,
Application Interrupt priority ...

(more)

39
views
no
votes
1
answer
Last activity 2017-04-04 11:26:07 +0200 by Jørgen Holmefjord flag of Norway

nrf_drv_twi doesnt read multiple bytes in SDK 12.2

I am trying to use the function or any function with my BLE UART application. I have a timer that expires to kickoff reading of some sensors and then when I try to read my sensor it only writes the ... (more)

130
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1
vote
1
answer
Last activity 2017-04-02 02:23:39 +0200 by endnode

How can I debug a system which is using softdevice S130 in BLE uart application? [closed]

I want to be able to read my i2c and program logic flow within the BLE application but when I try to set breakpoints it causes the cpu to do a hard reset. How can I capture the assert condition ... (more)

54
views
no
votes
1
answer
Last activity 2017-04-01 06:35:34 +0200 by Ladasky

nRF52 USB-UART broke, half-duplex?

Hi there,

I have multiple PCA10040 boards, and about a year's worth of experience developing code for them. I have suddenly started to have problems with USB-UART connections. Not even Nordic's SDK example code (in ../examples/peripheral/uart ... (more)

12
views
2
votes
1
answer
Last activity 2017-03-31 22:17:11 +0200 by endnode

Properly initializing an nRF51822-DK board [closed]

I have an nRF51822-DK board and so far I could not properly grab from the examples a simple thing: is there any specific initialization needed when coding?

For example I currently run APP_TIMER_INIT, APP_UART_FIFO_INIT, etc. but should I call some ... (more)

35
views
1
vote
2
answers
Last activity 2017-03-30 06:46:52 +0200 by allankliu

Regards compatibilities of demo code in different SDK ? [closed]

As a small team, we have to find silicons from retell market. Sometimes even the trader can not promise its source and batch. Here is a small list of nRF51822 available from the market.

nRF51822-QFAAC0-1311AH
nRF51822-QFAAC0-1322AY
nRF51822-QFABA0-1326AW
-------------------------
nRF51822-QFAAG3-1438AU
-------------------------
nRF51822-QFAAH0-1517DF
nRF51822-QFAAH0-1512BX ...
(more)

64
views
no
votes
3
answers
Last activity 2017-03-29 15:50:11 +0200 by Ansic

UART not working in nRF52832 as an observer role only.

I am using a nRF52832 which act as an observer role only and what is observe it send observed data to another device over UART.

When i turn off scanning and just run UART it works properly but when scanning ... (more)

19
views
no
votes
1
answer
Last activity 2017-03-28 08:38:57 +0200 by Kristin flag of Norway

nrf_UART freeze when disconnect during sending message - nrf51822

Good afternoon all,

We have seen something with nrf51822 a little bit unusual that we can't explain and that maybe some of you have already experienced.

In main loop, we have a switch() and, depending on some external command ... (more)

64
views
1
vote
1
answer
Last activity 2017-03-24 22:20:42 +0200 by Daniel Wang flag of Korea, Republic of

"device doesn't support UART"

ERROR OCCURS WHEN TESTING UART nus service on a nrf52832 custom board UART APP SHOWS LIKE THIS device doesn't support UART WHEN I TRYING TO CONNECT WITH MY DEVICE. PLZZ HELPimage description

51
views
no
votes
1
answer
Last activity 2017-03-22 17:07:06 +0200 by Luccas

Using secure dfu without LOG (in release)

Hello,

I'm facing some problems when trying to migrate from secure dfu debug to release mode.

I set the nrf_log to use uart instead of rtt in both debug and release versions, when using debug, all process went ok ... (more)

162
views
no
votes
5
answers
Last activity 2017-03-22 13:07:10 +0200 by H4NNE5

nrf52 DK: UART problems

Hello,

I integrated the relevant code from the "uart" example into the "ble_app_uart" example(this is all the code in the main routine):

uint8_t cr;        
uart_init();
    printf("\r\nUART Start!\r\n");

  while (true){

    while (app_uart_get(&cr) != NRF_SUCCESS);
    while (app_uart_put ...
(more)

703
views
1
vote
2
answers
Last activity 2017-03-22 08:12:32 +0200 by mahesh

Problem using UART and radio in ESB mode on nRF24LE01.

Hi

for few days I seem to got stack in using together UART and radio on nRF21LE01 in ESB mode and I suspect irq_flags = hal_nrf_get_clear_irq_flags(); to be cause of my problem.

What I want to achieve is to communicate to ... (more)

54
views
1
vote
1
answer
Last activity 2017-03-21 14:16:23 +0200 by Hung Bui

How to use ble_app_uart_c for custom UUID service?

Hello!

We're using the SDK 12.1 ble_app_uart_c as an example for a nRF52 DK as Central application. Instead of using ble_app_uart example for peripheral device, we created a new custom service based on ble_app_template example for our peripheral ... (more)

73
views
1
vote
2
answers
Last activity 2017-03-21 13:55:29 +0200 by Kenneth

UART peripheral of nRF52832 not disabled in System OFF mode?

Hi all

According to chapter 50.2 of the nRF52832 product specification V1.2, the pins used for the UART peripheral should be configured before in the GPIO peripheral to ensure correct behavior when the System OFF mode is entered ... (more)

49
views
no
votes
1
answer
Last activity 2017-03-21 06:37:11 +0200 by copperface

ADC does not work when I disable UART

Here is my question.

I always disable uart after I send data.

NRF_UART0->TASKS_STOPTX = 1;
NRF_UART0->ENABLE = UART_ENABLE_ENABLE_Disabled;

this was write in the function of:

uart_event_handler

and in the case of APP_UART_TX_EMPTY evt->type.

Before I send data, I always ... (more)

51
views
1
vote
1
answer
Last activity 2017-03-20 18:02:03 +0200 by f.salvatore

nRF UART driver initialization

Hello, i'm trying to use nRF UART driver (nrf_drv_uart) to implement a high level UART manager. I followed indications on SDK documentation but it doesn't work and i think that is a problem of initialization.

Configuration: nRF52832 - SDK ... (more)

59
views
no
votes
1
answer
Last activity 2017-03-17 10:42:27 +0200 by Wojtek flag of Poland

How Can I Create Bluetooth Serial Port?

I connected a Classic Bluetooth Device on my PC through by Bluetooth.

1-)I saw this message:

image description That means "Bluetooth Services Configuring"

2-)I saw this in device manager:

image description

But, When I connected nRF52832 on my PC through by Bluetooth ... (more)

11
views
no
votes
1
answer
Last activity 2017-03-16 10:03:54 +0200 by dchaudet

No error information UART nrf52 sdk12.1 [closed]

Hi, I'm using the UART to talk to a radio module with sdk 12.1 on nrf52.

I'm seeing frequent UART errors, where the event handler is called with event type APP_UART_COMMUNICATION_ERROR. Debugging in the UART0_IRQHandler() with this ... (more)

39
views
1
vote
1
answer
Last activity 2017-03-15 18:23:11 +0200 by awneil

UART/Serial Port Emulation over BLE maximum baudrate

Hi,

I just found the following example: https://infocenter.nordicsemi.com/ind...

There the baudrate 115200 is set by default. If I calculate the bit rate (8 data bits one stop bit) I get 12.8 kbit/s. With the ... (more)

39
views
no
votes
1
answer
Last activity 2017-03-15 10:55:24 +0200 by Kristin flag of Norway

Adding UART breaks code's functionality

Hi, I'm learning to use the nrf52832 (PCA10040). I'm on SDK12.2.0 S132.

I've done those basic tutorials while merging codes from the examples. My code can currently read the die temperature and broadcast it via ... (more)

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