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Last activity 2018-01-10 13:00:39 +0200 by Martin Børs-Lind flag of Norway

nrf52840 Q1AABB ble advertising problem

Hi, I have a problem with advertising on nrf52840q1aabb chip. I used example code ble_app_template on nrf52840q1aaaa revision and everything works fine but after changing mcu to nrf52840q1aabb application stops advertising - It's not detected by nRF Connection. I used ... (more)

70
views
no
votes
1
answer
Last activity 2017-12-29 10:22:30 +0200 by stephen

Question of setting NRF_RADIO->TASKS_DISABLE

Hi there,

I'm developing some proprietary RF application recently with nRF52. In this application, the radio frequency (tx and rx) is changed very often(every 3ms) by calling timeslot API. I know the NRF_RADIO->TASKS_DISABLE =1 should be set ... (more)

44
views
no
votes
1
answer
Last activity 2017-12-20 09:34:45 +0100 by run_ar

nRF528xx Radio TX/RX port specification [closed]

Hi

I have a few questions I couldn't find about radio part of nRF528xx series.

  1. Does all 3 chips have same radio module inside with same characteristics?
  2. Can ANT pin have DC bias during TX/RX? Are there internal ...
(more)

61
views
3
votes
1
answer
Last activity 2017-12-10 18:59:13 +0100 by AmbystomaLabs flag of United States

BTLE beacon strength

Hello,

I will be using the NRF52 to send out advertising btle packets.

I am curious if anyone has any idea if the radio is strong enough to still send out packets if the NRF52 is enclosed a small water ... (more)

24
views
no
votes
1
answer
Last activity 2017-12-07 13:08:18 +0100 by Petter Myhre flag of Norway

radio detect ,flash erase and store

i want to erase and store the flash after detecting the radio active.

The radio signal is also active, when i erase and store .

Do erase and store the flash may influence the interrupt ?

static void radio_notification_init(void)
{
    uint32_t err_code ...
(more)

148
views
no
votes
1
answer
Last activity 2017-11-07 12:33:45 +0200 by Hung Bui

Need advise on configuring radio access address for nRF52832 [closed]

We have been successfully using the Softdevice s132 to communicate with a smartphone using BLE. However, we have run into an issue with the compliance testing in the new requirement for a Receiver Blocking Test for European approvals.

Specifically, the ... (more)

30
views
1
vote
1
answer
Last activity 2017-10-15 04:33:08 +0100 by RK flag of Singapore

Need genral guidance on radio device

I need a cheap 2 or 3 button fob or itag to connect to/control my NRF51 firmware. So far I only could find "AB Shutter 3" as input device with >1 button but it is using Bluetooth V3. I ... (more)

47
views
no
votes
1
answer
Last activity 2017-10-03 11:34:59 +0100 by Jørn flag of Norway

nRF Radio default values on the uart example

Hi all,

I wanted to know the default values for the different NRF Radio paramateres in the ble_uart example.

I want to make some tests but not sure what is set as default on the FREQUENCY, TXPOWER and MODE of the NRF_RADIO_Type.

116
views
2
votes
2
answers
Last activity 2017-09-21 15:47:47 +0100 by Jørn flag of Norway

How to connect spectrum analyzer with NRF52840-DK?

Hi,

We were planning to use a spectrum analyser in order to do the radio test on the nrf52-dk. Where should the analyzer be connected? Should it be connected to the J1 connector on the nrf52-dk?

Also J1 connector is ... (more)

124
views
no
votes
1
answer
Last activity 2017-08-08 13:55:27 +0200 by khosla

Sniffer not functioning.

ppi.zipHi, I am using radio with ppi to advertize packets as shown in the mainc file attached. Even after allocating the access address of Bluetooth on line 196 as set_address0(0x8E89BED6); and advertizing channel selected as 37 as ... (more)

44
views
2
votes
1
answer
Last activity 2017-07-20 15:43:15 +0100 by Adrian Lita

nRF51422 radio issues

Dear Nordic,

I have built a board using nRF51422, and I've just manage to populate it and start it up. I'm using a modified example (peripheral_lbs), and everything seems to work ok (leds and buttons), but the radio ... (more)

137
views
7
votes
1
answer
Last activity 2017-07-11 13:24:57 +0100 by Emil Lenngren flag of Sweden

Radio Timing and PPI

Hi,

to investigate a timing problem in my Bluetooth stack, I've hard wired the Radio ADDRESS and END events to a GPIO pin using the PPI. The ADDRESS event is used to toggle the pin to high, and the ... (more)

31
views
no
votes
no
answers
Last activity 2017-06-29 12:08:41 +0200 by khosla

Sniffer not showing up my device.

Hi, I am using radio with ppi to advertize packets as shown in the mainc file attached.mainc.txt Even after allocating the access address of Bluetooth on line 196 as set_address0(0x8E89BED6); and advertizing channel selected as 37 as ... (more)

120
views
3
votes
1
answer
Last activity 2017-06-18 23:54:07 +0200 by endnode

Radio Notification and PPI

Hi,

If I configure the radio notification to ACTIVE and then set a DISTANCE of 800us, is there any way that I can configure PPI to toggle a pin for example?

I know that I can just do the toggle ... (more)

104
views
1
vote
1
answer
Last activity 2017-06-17 08:54:13 +0100 by Kristin flag of Norway

Build custom radio protocol for low data rate and long distance

Hello,

I would like to build two boards that can send small messages between them, at long distance. For that I would like to use some of your devices (I used 51822 in the past for BLE connectivity) with a ... (more)

197
views
no
votes
3
answers
Last activity 2017-05-31 17:06:38 +0200 by khosla

time synchronization across different nodes in a mesh network, single hop as well as multi hop.

I am working on time synchronizations between different nodes in a mesh network. I have earlier worked on the radio and the ppi examples given. I wish to generate time stamps at each send and receive events between two different ... (more)

235
views
1
vote
1
answer
Last activity 2017-05-09 07:26:31 +0200 by LovejoySteph

FCC Certification /Digital modulation minimum bandwitdth

Hi all,

Our company is in the process of certifying a device. This device is using a nrf52832 with radio.

We had no problem to comply with the ETSI standard, but things didn't go as expected for FCC certification ... (more)

156
views
no
votes
2
answers
Last activity 2017-05-03 22:08:36 +0100 by kellac1

RADIO ramp-up - what registers (if any) are latched?

I am trying to send lots of data through radio (basing on old micro esb project from github, but heavily modified). I need to keep radio IDLE (not DISABLED) when not transmitting, because ramp-up time sometimes is too long and ... (more)

155
views
1
vote
1
answer
Last activity 2017-04-04 19:55:23 +0100 by micallef25

NRF52 radio Tx to Rx

Hello,

I am running a simple application where I would like to listen for BLE packets for 100ms and then transmit a packet. (no soft device) I can successfully capture BLE packets but I am not transmitting any messages.

When ... (more)

164
views
no
votes
1
answer
Last activity 2017-03-22 03:28:51 +0100 by uba

Modulation by radio_test_example

I use radio test example in SDK 12.2.0.

Is it possible to perform modulation with PRBS9?

64
views
1
vote
1
answer
Last activity 2017-03-20 16:07:53 +0100 by Tgage

ESB Peripheral Question

I have set up some code using the ESB example in SDK v12.2.0 I and am able to transmit and receive packets between two nrf51 dongles, with no issues. However, when I program a custom PCB that has ... (more)

148
views
no
votes
1
answer
Last activity 2017-03-16 13:24:39 +0100 by Kristin flag of Norway

radio receive in timeslot API

I am using nrf51822(pca10028)

i used the timeslot API tutorial in devzone..and it worked fine but i want to integrate the radio receiver example along with this.

nrf_radio_signal_callback_return_param_t * radio_callback(uint8_t signal_type) { switch(signal_type) { case NRF_RADIO_CALLBACK_SIGNAL_TYPE_START: //Start of the ... (more)

127
views
no
votes
no
answers
Last activity 2017-03-09 13:28:57 +0200 by karthik

advertising packets received using radio receiver example

hi

i am using nrf51822. i used the radio tranceiver example and it works well. I am planning to advertise the received packets so that the range can also be increased and viewed in nRF connect android app

int main ... (more)

102
views
1
vote
1
answer
Last activity 2017-03-07 19:51:18 +0100 by Erlend

IRQ Handler for Radio - not entered

I'm trying to enable interrupt for radio events.

I have this code in main:

bsp_board_leds_init();
(...)
NRF_RADIO->INTENSET = 1 << RADIO_INTENSET_READY_Pos;
NRF_RADIO->TASKS_TXEN = 1;
while(1) {}

And I have defined this function:

void RADIO_IRQHandler(void) {
  bsp_board_led_invert(LED_2);
  int a = 0;
}

The ... (more)

81
views
1
vote
no
answers
Last activity 2017-03-03 23:04:45 +0200 by Tarik

application stops at sd_nvic_EnableIRQ(SWI2_IRQn)

Hi, My application always stops at the end of ble_stack_init() exactly at:

return sd_nvic_EnableIRQ(SWI2_IRQn);

of the function softdevice_handler_init.

My board does not have a low frequency external oscillator this is why my clock source is set to "NRF_CLOCK_LFCLKSRC_RC_250_PPM_4000MS_CALIBRATION"

134
views
no
votes
1
answer
Last activity 2017-03-01 16:54:16 +0100 by Torbjørn Øvrebekk

When is CRC status valid?

When is the CRCStatus register valid in the RADIO peripheral? Is it set when the radio leaves RX mode or only after the END event?

256
views
no
votes
1
answer
Last activity 2017-03-01 16:52:17 +0100 by Torbjørn Øvrebekk

About the radio mode of nRF52832

The radio mode 250Kbps is removed from nRF52832. However, by our test, nRF52832 radio can still work with radio mode 250Kbps with setting

NRF_RADIO->MODE = (RADIO_MODE_MODE_Nrf_250Kbit << RADIO_MODE_MODE_Pos);

and receive/send packet to nRF51822 in 250Kbps radio mode.

For nRF51822, the ... (more)

71
views
1
vote
1
answer
Last activity 2017-03-01 16:30:03 +0100 by Torbjørn Øvrebekk

nRF52 radio bit counter

Hello, recently I've found an information about bit counter in Radio Module in nRF52 Product Specification. Unfortunatelly I can't find any reference at infocenter how to use it, neither can I find any example in the Internet or ... (more)

193
views
no
votes
1
answer
Last activity 2017-03-01 13:44:16 +0100 by run_ar

Reading radio background noise level using nRF51 or nRF52

Hi,

I need to monitor radio channels and find the best one (with lower background noise) to use.
Is there any way to measure radio signal level in a particular frequency on nRF51 or nRF52? I'm looking for somthing ...
(more)

391
views
2
votes
1
answer
Last activity 2017-03-01 09:25:23 +0200 by Kristin flag of Norway

DTM or Radio Test

Hello! I need to perform some radio tests on a board that contains an nRF52 SoC. The nRF5 SDK provides two ways of performing such tests, either using DTM, as specified by Bluetooth SIG, or using the Radio Test example ... (more)

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