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Baughb
05-25-2005, 11:04 PM
I want to place data loggers in the field to monitor temperatures and pressures. These devices are designed to be hooked up to a PC from time to time via a serial connection for data downloads. I would like to take advantage of my wireless network connection on my tablet to collect the data when I am around the device and poll it. My tablet is running Windows 2000.
Is there a set of hardware that you would recommend that I could build and program to provide the wireless to serial communications?

steve_b
05-26-2005, 01:13 AM
You can get serial to ethernet connectivity easily enough. And if you have a wireless ethernet hub/switch/router, then it'd just be a matter of connecting in to that.
I imagine there's no serial connector on that tablet. Must be a USB port though!

You could get a serial wireless system and then just put a USB to Serial adaptor on the tablet end and run a terminal program of some sort!

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Steve
http://ca.geocities.com/steve.brady@rogers.com/index.html
"Inside each and every one of us is our one, true authentic swing. Something we was born with. Something that's ours and ours alone. Something that can't be learned... something that's got to be remembered."

Warren
05-27-2005, 06:19 AM
I am trying to do something similar: temperature·and soil moisture readings. I haven't thought through the wireless communication part yet, but I also need help. If you want to compare notes, please let me know. Warren

Sofalogic
05-27-2005, 08:10 AM
Warren:

What kind of range are you looking at for the wireless application? what moisture sensors are you using? I may be able to help you both. Stampdag is a great source for your application.


Sofa

voodoofish
05-27-2005, 09:10 AM
What are you guys using for the actual data storage? I've wanted to do something similar, just don't know where to look for the whole storage part.

Baughb
05-27-2005, 07:56 PM
What I have found up to this point is this:

1. Data collection and storage devices
ACR Systems, Inc. www.acrsystems.com single channel, multiple channel, specialized products
These devices communicate to a PC via serial communications. This would work, but I would like to get the tablet close to the device, initialize a serial download and collect the data via the 802.11b connection on the tablet.

2. Serial to 802.11b conversion.
B & B electronics www.bb-elec.com 1 port 802.11b to RS-232/422/485 Serial Server
I think this will work, but it is a bit pricey at $348.95 for basically duplicating the free capability of a serial cable.

steve_b
05-27-2005, 09:07 PM
You don't need to have such a costly device.

http://www.siteplayer.com· is one that may work for ya

http://scmstore.com/english/IPControl/Programmable&Embedded/default.asp· is another that might.

as far as data storage....if you're sending it off the the PC, you don't need to store it....let the PC store the data.

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Steve
http://ca.geocities.com/steve.brady@rogers.com/index.html
"Inside each and every one of us is our one, true authentic swing. Something we was born with. Something that's ours and ours alone. Something that can't be learned... something that's got to be remembered."

steve_b
05-27-2005, 09:12 PM
http://www.roguerobotics.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=5&MMN_position=6:2:5
this was the one I was trying to find!

Use a uMM Card for your data storage on site.

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Steve
http://ca.geocities.com/steve.brady@rogers.com/index.html
"Inside each and every one of us is our one, true authentic swing. Something we was born with. Something that's ours and ours alone. Something that can't be learned... something that's got to be remembered."