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Last activity 2017-02-18 21:10:11 +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)

25
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no
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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)

191
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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)

74
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answers
Last activity 2016-10-03 14:02:32 +0100 by pablo

Gazell Flywheel TIMER2_IRQHandler HardFault

Problem:

We trigger HardFaults reproducibly. By manually unwinding the stack we have traced the source of the error back to the TIMER2_IRQHandler in Gazell. We can see that the TIMER2_IRQHandler reads a callback pointer that sometimes is NULL, but no ... (more)

251
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2
answers
Last activity 2016-09-28 13:30:05 +0100 by Sigurd flag of Norway

what is the maximum range to connect 2 NRF51822 devices with Gazell

Hello,

I was looking into Gazell and read that Gazell only allows pairing when Host and Device are in close proximity to each other. This range is about 30 centimeters. I was wondering if this range could be extended? and ... (more)

118
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1
answer
Last activity 2016-05-13 14:15:45 +0100 by Kenneth

What's the maximum transmission speed using Gazell in nRf51 series

I notice that Gazell could only send 32 bytes per Payload in nRf51 series. So i wanted to know what can be the maximum speed i can attain using that payload.

119
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no
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1
answer
Last activity 2016-03-21 09:22:06 +0100 by milen.icom

FreeRTOS with Gazell problem on nrf51

Hi All,

We have been developing device with pca10028 evaluation board and in the process we use also few other custom boards with nrf51822. We use IAR. The device system is based on FreeRTOS, contains SPI controlled lcd display, the ... (more)

81
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1
answer
Last activity 2016-02-26 11:02:24 +0100 by Kenneth

NRF51822: Gazell error when performing write operation to external FLASH

Hi please help,

We are facing a problem of Gazell failure (not getting interrupt on gazell ISR) when i perform external Flash write using SPI.

If i disable gazell and write data to flash, and then enable gazell after flash ... (more)

428
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1
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2
answers
Last activity 2016-01-25 16:34:28 +0100 by Kenneth

Gazell frame rate too low? [closed]

I have continued to build upon the Nordic sdk10:gzll_ack_payload example using gcc-4.9-2015q1 on Linux. The differences are:

  • added UART for debugging (running at 460800 BAUD)
  • added RTC for debugging
  • running on pca10031 (Nordic usb dongle) instead of pca10028 ...
(more)

696
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no
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1
answer
Last activity 2015-12-02 13:58:13 +0100 by Torbjørn Øvrebekk

Example of using the Concurrent Multiprotocol Timeslot API for BLE & Gazell

Both nrf51 & nrf52 SoftDevice specs say that this can be done:

http://infocenter.nordicsemi.com/inde...

http://infocenter.nordicsemi.com/inde...

There have been a couple of similar questions on this forum requesting an example of using Concurrent Multiprotocol Timeslot ... (more)

406
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1
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2
answers
Last activity 2015-11-26 16:28:20 +0100 by Torbjørn Øvrebekk

gazell + ble evaluation

Hi, I am evaluating the use of Gazell and BLE as a possible solution for my project. I had heard that there was a way to have both BLE and Gazell running on a device at the same time, however ... (more)

68
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1
answer
Last activity 2015-11-18 11:17:38 +0100 by Torbjørn Øvrebekk

Is the gazell protocol update with the SDK version?

HI: I use gzell protocol to realize 2.4G communication with SDK 5. I wonder that is the gazell protocol update in SDK9 or SDK10 ? and is there any improvement in latest version! Thank you!

84
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answers
Last activity 2015-11-11 09:00:42 +0100 by kingqb

The callbacks in esb/gazell not work?How can we run ble and gazell/esb simultaneously?

Hi,I want to use my phone connect to NRF51822 by BLE, and used NRF24LE1 connect NRF51822 by GAZELL/ESB.That is to say, i want to use the device work with gazell/esb protocol and BLE alternatively! I add ... (more)

112
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no
votes
1
answer
Last activity 2015-11-04 11:20:00 +0100 by Petter Myhre flag of Norway

How to know whether frequence hop successful with gzl?

Hi: I want to get frequence hopping with gzl, Now I finish config gzl and commuicate successful between host and device. But I don't know whether frequence hop successful? would you please give some suggestion. I have an oscilloscope ... (more)

72
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no
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1
answer
Last activity 2015-11-03 11:24:45 +0100 by Petter Myhre flag of Norway

Can host send message to device by using gzll?

Hi: I develop my project with gazell, Device can keep send to host,but host can't keep send to device(I'm not mean for host sent ack to device). In my program, I use "nrf_gzll_add_packet_to_tx_fifo" in while(1 ... (more)

167
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no
votes
1
answer
Last activity 2015-07-17 16:18:45 +0100 by Hung Bui

Nordic Gazell resources timer

Hi every one,

I'm working on a custom broad and I'm trying to setup a gazell based protocol. I had a solution using soft device and BLE which worked fine but we want to skip connection step and ... (more)

164
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no
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1
answer
Last activity 2015-07-17 13:34:14 +0100 by Hung Bui

gazell more device question

SDK 9.0 nRF51 PCA10028 I want use nRF51 gazell function one host multi device. Reference example code "gzp_dynamic_pairing",host and device can auto pairing . But in host example code I can't find any function to get device "ID ... (more)

340
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no
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1
answer
Last activity 2015-07-06 18:26:36 +0100 by mobi flag of Korea, Republic of

Using Gazell

I have been using NRF51822 for some time as BLE chip with services. For some debugging reasons I need a faster stream method... I looked at Gazell and found it simple to use in terms of implementation on NRF51822.

But ... (more)

226
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Last activity 2015-05-26 18:55:09 +0100 by gap

nRF51822 realistic low latency using Gazell?

Hi,

We're looking for a low-latency 2.4GHz solution (not BLE) and the nRF51822 is oft-quoted as providing low latency, but what are the typical ms figures we could achieve for continuous data transmission, for example using the Gazell ... (more)

142
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no
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1
answer
Last activity 2015-05-18 11:32:36 +0100 by Hung Bui

gazell without ack

I was able to setup gazell communication between two devices one as device and other as host using 32 byte payload size in nRf51822 module. Here in gazell communication is it necessary to have Acknowledgment can i communicate without using ... (more)

174
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no
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answers
Last activity 2015-04-23 08:28:44 +0100 by Smura

About the obstacle which is at the time of Gzll communication. [closed]

Hi, I suffer from the phenomenon which can't sometimes maintain communication between the 32.8ms at Gazell communication at present. When not writing in SoftDevice, this phenomenon doesn't occur.

The condition that I confirmed the upper problem and ... (more)

289
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2
votes
1
answer
Last activity 2015-03-23 13:38:57 +0100 by Asbjørn flag of Norway

Where are the examples for nrf51822 using 2.4 GHz in SDK?

Hi,

  1. The device may be talking to a TX/RX station (connected to the Windows PC via USB) that uses an nRF24LU1+ so I'm guessing I will need to use ESB for compatibility. Do I need to load a ...

(more)

530
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1
vote
2
answers
Last activity 2015-03-16 17:09:34 +0100 by Asbjørn Sæbø

can I use simultaneously Bluetooth Smart and Gazell on the RF51422 and on nRF51822?

Hello I was wondering if I can use both the proprietary protocol 2.4 Ghz ( I understood the one to use for the new projects is Gazell ) and the Blueotooth smart on the nRF51422 ? and on the nRF51822 ? I suppose ... (more)

75
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no
votes
1
answer
Last activity 2015-02-18 16:41:50 +0100 by Asbjørn flag of Norway

Increase "gzp_dynamic_pairing" pairing distance

Greetings,

Is there any way to increase the pairing distance needed for the host and device to pair. The application I am developing needs static devices, if they loose connection for some reason they cannot be moved close to the ... (more)

362
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1
vote
1
answer
Last activity 2015-02-03 11:42:31 +0100 by Asbjørn flag of Norway

Sensor network using Gazell peripherals and BLE for PC connection

I would like to create a sensor network consisting of up to 17 nodes, I've been collecting a lot of information about means of communication between them and a computer and I came to conclusion using Gazell for collecting ... (more)

485
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no
votes
2
answers
Last activity 2015-01-26 21:58:19 +0100 by Rick.Soza

Can I use over the air DFU for proprietary application for nrf15822?

Hi

I've written an application that uses the gazell proprietary stack for nrf51822 and I want to use OTA-DFU using BLE. Is it possible to upload the new firmware using BLE but boot tho the main application that uses ... (more)

140
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no
votes
1
answer
Last activity 2015-01-22 10:18:25 +0100 by Asbjørn flag of Norway

Gazell goes to disabled state, but no call to disable it.

I'm using the example code for simple device/host Gazell in SDK 7.1.0 as my starting point for my application.

My program runs for a second or two, then ends up in the callback function nrf_gzll_disabled().

Since ... (more)

149
views
1
vote
1
answer
Last activity 2014-12-08 09:55:30 +0100 by Asbjørn flag of Norway

Use of RF front end with Gazell. [closed]

Hi there

I have never used a nRF51822 device but it looks like a good option for a product development.

Reliability of the link is a priority so the design will include a PA. I note in previous questions the ... (more)

175
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no
votes
1
answer
Last activity 2014-11-12 17:06:53 +0100 by Asbjørn flag of Norway

Advice for optimizing multiple device gazell system?

I have a system using the Gazell link layer in which 2 devices stream data to a single host. Each of the devices is assigned a different pipe, and all three (host, and both devices) have the same channel table ... (more)

103
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2
votes
1
answer
Last activity 2014-11-12 15:25:33 +0100 by Torbjørn Øvrebekk

deadlock possibility on gazell protocol?

Hi all,

In my project I'd like to use gazell for to communicate 2-6 devices with host. Furthermore I use switching between BLE and Gazell (only 1 device support till now) so there is often "out of sync" state ... (more)

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