JeeNode transmit distance

Discussion of Jee Products and Wireless Tech
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youevolve
Posts: 2
Joined: Mon Aug 25, 2008 6:00 pm

JeeNode transmit distance

Post by youevolve »

Hi Paul,

Love the new site!

I looked around, but couldn't find what sort of transmission distance to expect from the JeeNode. What are people's experiences with this device?

Thanks!
paul
Site Admin
Posts: 775
Joined: Mon May 12, 2008 4:19 pm

Re: JeeNode transmit distance

Post by paul »

Sorry about the slow response,

Re: transmit distance,

Our testing is informal so far

150 feet though three or four walls maybe
100 yds outdoors maybe. Both the developers live in cold and snowy climates, so when it gets warmer in the spring, maybe some harder specs will come out :)

Definitely not material for model rocketry but lots of uses around the house.

Paul
solid_liq
Posts: 1
Joined: Wed Dec 22, 2010 8:29 pm

Re: JeeNode transmit distance

Post by solid_liq »

Did you ever get better information about the range? Range is a very important factor in my decision regarding whether or not to order four of the boards.
paul
Site Admin
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Joined: Mon May 12, 2008 4:19 pm

Re: JeeNode transmit distance

Post by paul »

The manufacture's site quotes distances much larger than the ones I listed above is all that I can say. We still haven't done any really hard testing. What's your app?

Paul
stevech
Posts: 9
Joined: Sat Apr 02, 2011 1:20 pm

Re: JeeNode transmit distance

Post by stevech »

HopeRF RFM12B. Uses SiLabs chipset.

Range will vary by
Band: 433 is best; 868/900 about 30% less (laws of physics)
Antenna type
your chosen data rate and channel bandwidth - halve the channel bandwith (and data rate), great increase in range due to ability to demodulate weaker signals
your chosen settings for minimum RSSI and other filter configurations.
your packet size. Smaller = less probability of error
intermittent interference at your chosen frequency

Transmitter is about 2mW.
Simple wire antenna has essentially no gain.

My one test:
915MHz. Highest speed, widest channel (poorest range)
Simple wire antenna. Not carefully cut to correct length.
One node inside wood frame house, on desk, 1st floor
outside, receiving node: error rate too high at about 300-400 ft.

Effective useful range increases if you use ACK with retransmit to correct errors and/or forward error correction codes in the data.

Range would be better with line of sight, better antenna, lower data rate, narrower channel.
paul
Site Admin
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Re: JeeNode transmit distance

Post by paul »

Hey thanks for the great research and quotes from the datasheet stevech,

There is undoubtedly a lot of material on JeeNode range on the JeeLabs forum if one is interested.

Here's a blog post on RFCommunication details
http://jeelabs.org/2010/07/11/rf12-communication/

Here's a thread on antennas with an eye to getting 1000M line of sight out of a JeeNode
http://talk.jeelabs.net/topic/180
stevech
Posts: 9
Joined: Sat Apr 02, 2011 1:20 pm

Re: JeeNode transmit distance

Post by stevech »

I should clarify earlier post
outside, receiving node: error rate too high at about 300-400 ft.
meaning the error rate, with the high data rate, is GOOD for the first few hundred ft. Range would improve with better antennas, lower data rate, narrower channel, etc.
ihanna
Posts: 1
Joined: Thu May 31, 2012 11:55 am

Re: JeeNode transmit distance

Post by ihanna »

stevech wrote:I should clarify earlier post
outside, receiving node: error rate too high at about 300-400 ft.
meaning the error rate, with the high data rate, is GOOD for the first few hundred ft. Range would improve with better antennas, lower data rate, narrower channel, etc.

How about the the climate? Is this device capable to handle extreme climates and weather? I want to buy this for my brother for his birthday! Please reply ASAP! His birthday is on Sunday and I have to order this from Amazon. So please reply. I am getting really tired from researching :(
Before I got married I had six theories about bringing up children;
now I have six children and no theories. John Wilmot website
paul
Site Admin
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Joined: Mon May 12, 2008 4:19 pm

Re: JeeNode transmit distance

Post by paul »

I don't think there will be issues with the climate - IF the units are in a water tight box. Water on any electronics usually quickly ruins them due to electrolytic reactions with the metal pads.

I don't think high humidity would be an issue for range.


Paul
Aaronhycle
Posts: 7
Joined: Mon Sep 04, 2017 3:31 pm

JeeNode transmit distance

Post by Aaronhycle »

Exactly what I was describing. Does your friend have many friends, or get out much?
Remilqdmv
Posts: 7
Joined: Wed Sep 20, 2017 7:26 pm

JeeNode transmit distance

Post by Remilqdmv »

I want to know what all of you throw for your max distance shots?

I throw a Star Destroyer or a Star Wraith for my distance drives...but this weekend for jr. distance comp at worlds i will throw pro destroyers
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