I thought I saw bacon … and then got disappointed.
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would the device discussed here help? https://www.ghielectronics.com/community/forum/topic?id=13174&page=1#msg134164
I am a backer, we will see 
For Active RFID tags I have used this company: http://wavetrend.net/
They have various style of tags.
Active RFID tags are pricey, probably in the > $20 for each tag. This would probably be OK if you can re-use the tags since they have a battery life of a 3 or 4 years.
If you need to get the cost down (< .10 a tag) you will have to go with passive RFID and use the RFID tags that come as labels. The cost is then in the readers. I have not done anything with passive RFID.
I am actually looking at making my own smart RFID tags using this: http://www.rfduino.com/
They use BlueTooth Low Energy. Good battery life and I can control the function of the tag.
The same company has other types of small RF transeivers you can check them out here: http://www.rfdigital.com
Hope that helps.
-Steve
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[quote=“skeller”]
I am actually looking at making my own smart RFID tags using this[/quote]
Steve, I’ll be interested in keeping contact with you about this. I also may quite a hefty backing of their Kickstarter project. My main interest was also to make an RFID tag for a project I have in mind and really looking forward to receiving some hardware. They should have mailed the first prototipes by now, but seem to be running a bit behind schedule. Please let us know on this forum when you received your devices. I will do the same.
Brilliant ideas. I backed them as well it’s exciting to see what happens with small rf stuff in the coming years.
Thanks everybody!
According to the last update from RFDuino they are starting to ship to some backers today or tomorrow. So keep your fingers crossed to see if you’re one of the lucky ones.
The RF Pipe board from Justin (https://www.ghielectronics.com/community/creations/entry/12) uses a module from the same company. (www.rfdigital.com) I believe it is the same pinout as the new RFDuino. I am not sure what pins he has from the module to the gadgeteer plug. So there might be some interesting possibilities there.
The module Justin uses does have a RFID Tag mode. When it is in that mode it broadcasts its unique 32bit number every 2 seconds. The receiving module will send the unique number out its serial port. So if that is all you need you might not need to wait for the RFDuino. The RFDuino will allow control over the broadcast rate, the size data broadcast data packet as well as get the received RSSI signal strength.
That was a new angle on Justins module just there! Great
This is exciting news. May ask… you get an email from them? I never received any emails from them yet and just checked their website but there is no updates that I could see. Maybe I should contact them and ask when they are shipping mine.
@ KiwiSaner - I would suggest you log into your Kickstarter account and check you kickstarter notifications and Backer history to be sure you have properly backed the project.
All the updates come through Kickstarter and are posted on the Kickstarter page.
http://www.kickstarter.com/projects/1608192864/rfduino-iphone-bluetooth-40-arduino-compatible-boa
FWIW, I have not received any hardware yet. Looking at the pictures they posted it appears they are shipping the smaller reward kits.
@ skeller - Thanks. I could see that now. And sorry Nbuch… I inadvertently hijacked your thread with my talk about the RFduino. Promise to be quiet now…
RFDuino talk is very relevant! When you have received the thing we would love to hear some details! And see if it integrates with the Gadgeteer Bluetooth module.
Its definetely worth a new thread
Few years ago(5years or more) Im test Syris SYRD245-1N devices with their tags and Im with tags inside cardboard boxes with one receiver unit easily cover 10m x 10m area…
@ njbuch - Will definitely let you know. I suspect since the Rfduino thingy also have a serial UART that one will be able to easily connect it to the Gadgeteer board via a U socket and then use it as a RF pipe to talk to another board or wireless sensor etc. But one of the things I want to use it for is very similar to your requirements… an intelligent low power long range RFID tag.