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1  Using Arduino / Networking, Protocols, and Devices / Re: AXSEM AX5043 RF Transceiver on: February 27, 2014, 08:28:08 am
Hi Chris

i hope you get this message.
I have just received free samples form Asxem AX5043 chips and after reading through the complete data sheet this chip is incredible! Which would prompt me to ask what did you mean with front end that is required ? the chip interfaces via MISO and MOSI so would it not just work with arduino ?  I would really like to create a small Data radio out of these units.   
2  Using Arduino / Networking, Protocols, and Devices / Re: AXSEM AX5043 RF Transceiver on: February 26, 2014, 05:59:20 am
HI Chris

Thank you for the reply, i thought i was alone .....

I have now ordered a few NRF905 chips from nordic.
They have been proven to work with Arduino and they offer similar functions but will see how they perform.

Rustie0125
3  Using Arduino / Networking, Protocols, and Devices / Re: RF Design question. on: February 26, 2014, 01:12:24 am
Hi Mike

I know about the licensing issue, but our regulations state that up to 10mW devices are allowed in the free band with out licensing  and once a device has been designed I can us it for personal use until I want or plan on selling it then I would just to get is certified to at 10mw  output power. I know the UK is more strict on these rules but you would be amazed with what you get away with in this country.
4  Using Arduino / Networking, Protocols, and Devices / RF Design question. on: February 26, 2014, 12:05:45 am

I am looking for a small data radio to use in one of my projects that is supported by Arduino libraries but that i can find the individual components to make my own boards. I am currently looking into the NRF905 chip from NORDIC and although it is an old chip I am impressed with what it offers. my question is the following.

to save space I will be using a PCB antenna on the board but i need to know if I can place all my components inside the rim of the antenna ? I know if everything is switched on chances of interference is great but for my application everything will be in sleep/switched off before I transmit and when the other components are working the Radio will be sleeping.


Example of a board , I want to move the actual radio to the inside of the board and the MCU on the back of the board with other components.

would this work and what do I need to look at for ?
5  Using Arduino / Networking, Protocols, and Devices / Re: nRF24L01+ only working when I place my finger on it on: February 25, 2014, 08:17:32 am
Hi
I have been playing with the NRF24L01 for while now and what I have picked up is that their is slight variations in performance from board to board, have you tried just another unit ? I have ordered these things before and 3 out of 5 units was defective so be careful where you order from.
6  Using Arduino / Networking, Protocols, and Devices / Re: Where to buy RFM22B RF Chip not the board on: February 21, 2014, 10:59:03 am
How would the NRF24L01 with a LNA and PA do with a wire or PCB antenna ?
7  Using Arduino / Networking, Protocols, and Devices / Re: Where to buy RFM22B RF Chip not the board on: February 21, 2014, 08:29:57 am
 Riva

Its no secret what Im working on I have been trying to make it as public as possible but cant seem to get much attraction from the community. you can see the project herehttp://powerduino.blogspot.com/2014/02/open-source-community-built-ultra-low.html here but in a nutshell im trying to create a TINY GPS arduino tracker. so to answer your questions in short.

Range :800-1000meters
Freq 315-900mhz will do (better penetration)
Data rates as high as possible but the application is not time critical so multiple packets can be sent.
MUST be a transceiver due to the nature of the project.
Size well lets put it this way, Im trying t put a GPS , MCU ,Radio , Accelormeter, RTC and battery on a board no bigger then a Pro mini . that is why i need to be able to move the components around.
8  Using Arduino / Networking, Protocols, and Devices / Re: Where to buy RFM22B RF Chip not the board on: February 21, 2014, 07:01:35 am
I fully Agree with you on the design part but what I am working on needs a smaller design, or at-least different config of components. and the RF69 module works at 2v up I need a module that works on 1.8v as that is the power I have available.

any other radio suggestions that works at 1.8v with minimum range of 800-1000 meters?
9  Using Arduino / Networking, Protocols, and Devices / Re: Where to buy RFM22B RF Chip not the board on: February 21, 2014, 06:32:51 am
Hi Riva

They dont have the RF22 chip. and i need a long range radio that has been proven to work with Arduino

I have looked into this section and asked them per email please give me examples of these units and they still replied with the completed boards, I don't want to order these things and get the wrong thing. have you ordered them before ?
10  Using Arduino / Networking, Protocols, and Devices / Where to buy RFM22B RF Chip not the board on: February 21, 2014, 06:00:27 am
Hi Guys

As the heading suggest where can I buy the components found on the RFM22B board to create my own layout of the board? I have emailed HopeRF and they just reply with links to the pre-made boards.

thanx
Rustie
11  Using Arduino / Networking, Protocols, and Devices / Re: RF question on: February 21, 2014, 05:46:05 am
You Would have to give each unit I an ID in the packet sent across, and the receiver would need to have the same id on the rx side.

I tried this with the cheap 433mhz ebay radio with some success but when in very close proximity the noise from all the radios washed out any comms and nothing worked. For this to work properly you would need to send a packet receive the packet buffer it switch of the radios that done and transmit again. this is to limit all the radios talking at the same time.
12  Using Arduino / Networking, Protocols, and Devices / AXSEM AX5043 RF Transceiver on: February 19, 2014, 03:54:14 am
Hi Guys

Out of interest and with limited background in RF design how hard is it to use / code a Chip like http://www.axsem.com/www/rfics/narrow-band/ax5043 with Arduino if no library is available for it. ?

The RF22B is a good choice and plenty of information to be found but I like the functions and power consumption of this chip more for low power devices.

Thinking of creating a UNO shield to test these units but first want to find out if it will work like intended with Arduino.

Thanx
Rustie
13  Using Arduino / Project Guidance / Re: TrackerDuino. Community development on: February 19, 2014, 03:49:16 am

Coffee is black.......
14  Using Arduino / Project Guidance / Re: TrackerDuino. Community development on: February 18, 2014, 02:18:41 am
Robin

I am not re-posting everything here that has been posted on the project home page.
please go and read it http://powerduino.blogspot.com/

thank you
15  Using Arduino / Project Guidance / Re: TrackerDuino. Community development on: February 17, 2014, 11:01:56 pm
as per the home page for this project , my expectations for this project is 1km.
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