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16
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2
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Last activity 2018-01-19 17:08:38 +0200 by Dave_N

Can Gazell protocol use for broadcast data

Is there any possibility setting that let Gazell device broadcast data and receive from multiple host

27
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no
votes
1
answer
Last activity 2017-12-22 10:49:19 +0100 by Torbjørn Øvrebekk

how to set nRF51822 sensitivity?

Hi,

We are using nRF51822 Gazell protocol. We found that when host dbm is getting down to -61 or -62 dbm, the communication will lost. We had set it to +4db and use 250kb datarate, use NRF_GZLL_DEVICE_CHANNEL_SELECTION_POLICY_USE_SUCCESSFUL & 2700 time slot ... (more)

43
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no
votes
3
answers
Last activity 2017-12-18 13:04:07 +0100 by anna

gazell preload

Hi ,all

I have a problem in my project .I want to use gzp preload ack feature .When the host receives datas ,I would use this function "void gzp_preload_ack(uint8_t* src, uint8_t length, uint8_t pipe)" to send datas to the ... (more)

27
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no
votes
1
answer
Last activity 2017-12-01 11:22:14 +0100 by Torbjørn Øvrebekk

RF Status Running Gazell on nRF51422 s130

I need to use an external RF amplifier. This needs two control lines, one for TX and one for RX. I need some way to know when to change the state of the control lines. Is there some status word ... (more)

31
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no
votes
1
answer
Last activity 2017-11-30 07:13:23 +0100 by endnode

radio state RX

I need to us an external RF amplifier that requires TX and RX control lines. I'm looking for a way to tell when TX starts to kick the unit into TX mode. I also need to know when RX ... (more)

33
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no
votes
1
answer
Last activity 2017-11-23 15:52:42 +0100 by Torbjørn Øvrebekk

How to reduce Gazell disable current

When I call nrf_gzll_enable(), then nrf_gzll_disable(), and go to sleep with __WFE(), there is about extra 6uA draw due to this enable/disable action. It seems the nrf_gzll_disable() does not turn everything off due to the use of the radio ... (more)

34
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no
votes
1
answer
Last activity 2017-11-23 12:47:12 +0100 by Hung Bui

Gazell: Possible to send every timeslot?

Hi,

I am using as settings:

timeslot period: 600 us

data rate: 2M

channel table size: 4

timeslots when out of sync: 8

timeslots per channel: 2

sync lifetime: 10

max tx attempts: 2

channel selection policy: use current

I ... (more)

66
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3
votes
2
answers
Last activity 2017-11-10 13:23:11 +0200 by Petter Myhre flag of Norway

Which is the best proprietary stack to pair multiple Devices (single FW) to a single Host and use several systems (e.g. Host_1 with Device_1 and Host_2 with Device_2) concurrently (one within the antenna range of the other) without interferences?

I'm developing a system which consists of 1 or more remotes (3 or 4 max) that have to communicate with a single host.

I need a fairly simple protocol, low power optimised especially from the Remote side. I already ... (more)

42
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1
vote
1
answer
Last activity 2017-11-09 16:30:56 +0100 by Jørgen Holmefjord flag of Norway

undefined definition of all 'nrf_gzll_xxx' [closed]

Hi,

Currently i am trying to understand the gazell api using the nRF5 SDK v14.1.0 example gzp_dynamic_pairing. Within my process to trying to understand the gazell api i did cross a problem. When browsing to the reference of ... (more)

42
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1
vote
1
answer
Last activity 2017-08-24 09:56:07 +0100 by Jørgen Holmefjord flag of Norway

Where is the latest User Guide for Gazell?

Hi,

the documentation page of Gazell warns that it is outdated.

Warning: This is old documentation, and should only be used for historic reference. Please go here to find the latest.

documentation page

But where do I find the latest ... (more)

35
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no
votes
1
answer
Last activity 2017-07-27 15:39:05 +0100 by Hung Bui

Error in Gazell diagram? [closed]

I am not sure whether there is a small error in a Gazell packet transaction diagram, or if I have an incorrect understanding. From Gazell user guide:

If only the ACK packet sent from the Host to the Device is ...

(more)

136
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1
vote
1
answer
Last activity 2017-07-20 09:25:10 +0200 by Jørgen Holmefjord flag of Norway

looking for example Gazell project on Nrf52840

I am looking at using two Nrf52840 on Custom PCBs to create a wireless link from my product to a PC one 840 would be the host and would be wired to the PC using USB (HID,MSC,CDC) and ... (more)

43
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no
votes
1
answer
Last activity 2017-07-12 12:16:18 +0100 by Hung Bui

[GZP] Two gazelle "slaves" pairing with each other

Hello,

I have two identical devices with Laird's BL600 chip (that uses NRF51822). They are initialized as NRF_GZLL_MODE_DEVICE and use GZP library (without encryption - only pipe no 2 is used). They are cyclically calling gzp_address_req_send() function until the positive ... (more)

54
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no
votes
1
answer
Last activity 2017-05-31 14:27:10 +0100 by Hung Bui

Using Gazell on third party chipset

Hello,

I want to create BLE connection between two different modules - nrf51822 and TI CC2564 (possibly Laird BT800). Is there any chance on using Gazell protocol on other devices than Nordic?

143
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3
votes
1
answer
Last activity 2017-05-28 02:32:00 +0100 by endnode

Gazell nRF51822

Does the s210 softdevice not function on the nRF51822? I see it available for the nRF51422 here but it is listed under the 51422 only.

I have a v1.1.0 PCA10031 (nrf51422) and have written an LED blink example ... (more)

88
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no
votes
1
answer
Last activity 2017-05-26 11:30:40 +0100 by Torbjørn Øvrebekk

gazell out_of_sync and in_sync [closed]

hi ,all

I feel confused about" out_of_sync" and" in_sync" parameters .If a devece is in sync,how the channels was changed ?And what's the use of"nrf_gzll_set_device_channel_selection_policy())"? And how could I get the sync_lifetime in our softcode ?

89
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no
votes
1
answer
Last activity 2017-05-22 16:46:28 +0100 by LT_Viktor

Gazell data lag when more than 1 device is connected

Hi! I am fairly new to programming micro controllers so apologies if I ask many questions. I am using NRF52832. The situation is this - I have 2 devices and 1 host . After receiving data the host then sends data via ... (more)

66
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no
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no
answers
Last activity 2017-04-23 04:34:36 +0100 by nine-fox

BLE hid keyboard and Gazell at the same time [closed]

Hi there,

My scenario is the split keyboard which has 2 parts: left-hand part and right-hand part. Each part has a NRF52832. I am willing to implement the left-hand part to be a BLE hid keyboard and also connect right-hand ... (more)

46
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no
votes
1
answer
Last activity 2017-04-19 13:53:58 +0100 by Jørgen Holmefjord flag of Norway

gazell in more devices application [closed]

hi all:

I am a new user.Now i have a project in which I need to implement a function a host and four devices .I just want to know if i use the example of " gzp_dynamic_pairing " what do i ... (more)

25
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no
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no
answers
Last activity 2017-03-29 17:19:59 +0100 by Constantin

Are the pairing information of gzp stored in the flash?

So the question would be if I would need to pair each time the device comes out of reset or are there information stored to return to direct communication without pairing if pairing has been executed once?

And what happens ... (more)

265
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1
vote
3
answers
Last activity 2017-03-21 14:42:40 +0100 by Hung Bui

Frequency hopping with S132 v3

Hello! I'd like to know if S132 v3 implements the frequency hopping scheme defined by BLE.

I've read some documentation on Gazell, but from what I understood, that is a completely different protocol, not a superset of BLE ... (more)

65
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1
vote
1
answer
Last activity 2017-03-20 11:31:14 +0100 by Jørgen Holmefjord flag of Norway

Gazell example with PCA10028 does not load - does it need softdevice?

I am confused about the lack of softdevice information for the Gazell examples. I am looking at SDK 10 now having first tried SDK12 before deciding to stay with 10.

As a starting point, I have no trouble compling, loading ... (more)

64
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no
votes
1
answer
Last activity 2017-03-13 13:39:51 +0100 by Hung Bui

GZP (Gazell Pairing Library) causes application to reset into Bootloader

Hello there, thanks so much for taking the time to read. My problem is the following

I am trying to run GZP (Gazell Pairing Library). After successfully pairing with a Gazell Host, if I power cycle my Gazelle device (NRF52 ... (more)

108
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no
votes
2
answers
Last activity 2017-02-22 16:07:00 +0100 by JimInCA

Gazell host with multiple devices

I'm new to Gazell, so please excuse the simplicity of my question, but I just seem to be missing something.

I have an application where I will be using one host with two devices. When the host receives a ... (more)

152
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no
votes
1
answer
Last activity 2017-02-17 13:53:05 +0100 by Dandingzz

How to improve the communication distance with Gazell?

My gazell configuration is as follows:

#define PIPE_NUM                    0
#define TIMESLOT_PERIOD             2000
#define TIMESLOT_PER_CHANNEL        2
#define CHANNEL_TABLE_SIZE          1
#define CHANNEL_TABLE               {18}
#define SYNC_LIFETIME           (3 * CHANNEL_TABLE_SIZE * TIMESLOT_PER_CHANNEL)
#define MAX_TX_ATTEMPTS             3
#define TX_POWER            NRF_GZLL_TX_POWER_4_DBM
#define TX_DATARATE         NRF_GZLL_DATARATE_1MBIT

Payload size: 22bytes

frames per ... (more)

46
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no
votes
1
answer
Last activity 2017-02-09 09:05:14 +0100 by Torbjørn Øvrebekk

Gazell how to update channel table using num_channel_switches

HI, I look at nRF5 SDK doc about Gazell,see that 'the nrf_gzll_device_tx_info_t contains the num_channel_switches parameter which can be used by application to determine wheather the RF channels are reliable.'But I don't know how to achieve that ... (more)

144
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no
votes
1
answer
Last activity 2017-01-10 15:44:25 +0100 by Sigurd flag of Norway

about nrf51 Gazell timeslot period

hi, I test the gazell example gzll_ack_payload in SDK9.0,I found that the default timeslot period is 600us.But after testing using logic analysis,I found sometime transfer interval is600us,but most time it's 1200us. What's the reason?

42
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no
votes
1
answer
Last activity 2016-12-15 15:04:05 +0100 by Torbjørn Øvrebekk

how to add a capslock function in gazell of 'nrfready_desktop'?

I'd like to add a capslock function in gazell when i am developing a keyboard based on 'nrfready_desktop_2_v3.1.0'. After i have read the source code from nordic, i cant found about how to get the RX datas ... (more)

72
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no
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no
answers
Last activity 2016-11-16 09:53:26 +0100 by Jørgen Holmefjord flag of Norway

Gazell two device cannot suppport ,why?

I use Gazell to acomplish one host --two device.When i just have one device,everything is OK。But when added to two,it cannot work. I think,whether channel of two devices is same cause it ?? So ,for host ... (more)

217
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no
votes
1
answer
Last activity 2016-10-17 02:08:30 +0100 by Kevin

Gazell Ack not received after data transfer

I'm working on a very simple Gazell build - basically the gzll_ack_payload example with some of it pulled out, since I'm working on a board with no LEDs or buttons to run that specific build against. It's a ... (more)

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