Wireless Data Logging

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Matt 20 years ago

Hello,

I am prototyping a project that transmits information taken by a data logger wirelessly up to a distance of 10km. I'm trying to find transmitters/receivers that are:

- low cost

- narrow-bandwidth

- long distance (low frequency)

- few external components (a package basically)

The Radiometrix BiM1 looks to be a good transceiver, boasting up to

10km range. Are these commercially available in the United States?

I'm also curious as to any suggestions about how to maximize the distance between transmitter and receiver. I'm planning on a yaggi on one end (fixed) with a quarter-wave whip using quarter-wave radial ground elements on the mobile end.

Thanks in advance for any advice/products suggestions!

-Matt

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Deefoo 20 years ago

If the data can be send in bursts every once in a while you could use a mobile phone. Boosted WiFi ?.

-- John

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Matt 20 years ago

Hi John,

The deployment point would be on Midway Island and the Great Barrier Reef. Not much cell coverage in those places. I like your idea of sending in bursts, this can allow me to keep the usable bandwidth down in order to send across larger distances.

-Matt

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Tom 20 years ago

Max Stream advertises a 11 km range with their 1 W modules using a dipole antenna:

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Tom

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Matt 20 years ago

Hi John,

The deployment point would be on Midway Island and the Great Barrier Reef. Not much cell coverage in those places. I like your idea of sending in bursts, this can allow me to keep the usable bandwidth down in order to send across larger distances.

-Matt

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Rene Tschaggelar 20 years ago

data

on

I once came across the ADF7011 from Analog Devices. A 433 & 868MHz band transmitter with a datarate of up to 76kbits. For 3.67$ at single quantities at digikey. A booster amplifier and a Yagi should do.

Rene

Ing.Buero R.Tschaggelar - http://www.ibrtses.com & commercial newsgroups - http://www.talkto.net

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Rich Grise 20 years ago

Um, isn't that a little more than 10KM?

;-P Rich

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Rene Tschaggelar 20 years ago

I once came across the ADF7011 from Analog Devices. A 433 & 868MHz band transmitter with a datarate of up to 76kbits. For 3.67$ at single quantities at digikey. A booster amplifier and a Yagi should do.

Rene

Ing.Buero R.Tschaggelar - http://www.ibrtses.com & commercial newsgroups - http://www.talkto.net

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Matt 20 years ago

I checked out the data sheet (not as technical as I'd like to see) but really approve of this module. The cost is higher than the Radiometrix BiM1, however the distance is increased as well as the output power. I'm going to seriously consider this module, thanks Tom!

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soar2morrow 20 years ago

You're welcome.

One fact of life in RF that is hard to avoid: power = $$$!

Tom

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Wireless Data Logging

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