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Now looking at that XBee Explorer datasheet:http://www.sparkfun.com/datasheets/Wireless/Zigbee/XBee-Regulated-v10.pdfIt appears they are using a diode to drop the signal by ~1.2V on the DIN pin, and a 1k resistor to absorb some current. Except there are two problems:5V-1.2V is 3.8V - still too high!and they have the diode backwards, at least in the schematic (so it won't work)There you have it, SparkFun can't even get a voltage divider or a diode correct
So I grabbed one of my APPBee-Sip boards from Selmaware.com (which is twice the price and probably twice as big as it has a full built in voltage regulator and an IC that does voltage conditioning...
QuoteSo I grabbed one of my APPBee-Sip boards from Selmaware.com (which is twice the price and probably twice as big as it has a full built in voltage regulator and an IC that does voltage conditioning... And did it work? Thanks!
We have discontinued the AppBee XBee adapter boards. For other choices, please visit Parallax selection or other vendors, such as www.sparkfun.com. This page will be left up for reference for a while.
madsci1016, well, you are using an ATmega168 (or whatever your Arduino has), which potentially could accept lower UART voltages. Try on your Axon II and see what happens.Anyway, I tried the Sparkfun adapter on my Axon II and it didn't work for me, either. The Parallax adapter has been ordered.
I have used nothing but a Sparkfun regulated board and both a 900 and 2.4 Xbee with my Axon just fine for a year now.
This one is smaller, I wonder how well it works:http://www.seeedstudio.com/depot/uartsbee-v31-p-688.html?cPath=104_109
http://www.parallax.com/Store/Accessories/CommunicationRF/tabid/161/ProductID/691/List/0/Default.aspx?SortField=ProductName,ProductNameAnyone can verify it works? I'll probably just get it and find out the hard way
Quote from: Admin on September 12, 2010, 12:43:56 PMhttp://www.parallax.com/Store/Accessories/CommunicationRF/tabid/161/ProductID/691/List/0/Default.aspx?SortField=ProductName,ProductNameAnyone can verify it works? I'll probably just get it and find out the hard way Has anyone tried this board out yet to see if it works?
The output from the Xbee is only ">= 2.7 V", which is probably too low for the Axon UART. It probably needs closer to >=3.3V. I couldn't find a voltage requirement for UART on a quick glance through the 640 datasheetAlso, selmaware.com has discontinued the AppBee boards . . . anyone know of a good replacement?
I initially bought the Parallax board, and that worked fine (but twice as big and zero mounting holes? Lame... With the encouragement of some of the Trossen guys, I went ahead and ordered the sparkfun version, and it is in fact working.I'm using the Axon, but I'm using the 1.25 mW xbees (e.g. here) rather than the (seemingly) more commonly used 1mW ones.If it ever turns out to be flaky, I have the parallax one, at least. (And I'll post here again...)
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