LilyPad XBee using the 3.3V and the - Pins instead of the + and -

Projects Networking, Protocols, and Devices
1

Hi.
I've bought LilyPad Xbees sku: DEV-08937 (with XBees S2)

and soldered them to LilyPad Simple Boards.

They work fine.
Until now I have a LiPo sitting on the LilyPad Simple Boards' white socket.

Now I read, that the top Power Pins between Rx and d0 (called - and 3.3V), that I used, are outputs?
I think I should have used the lower + - Pins between sip and d4.
Since I tried the configuration out before, and they worked, I didn't think about it further.

Can I leave it like this or do I have to take all my machines apart again?
I specifically ask you because I want to solder the LiPo now to + - of the LilyPad Simple Board,
instead of using the white plug, thus potentially having a direct connection between the battery (3.7V, maybe later 4.8V) and the two
Pins of the LilyPad XBee that I might have wrongly used (- and 3.3V on the top).
Will this fry my Xbee now or do those pins also convert into 3.3V?

Thanks
Alexandra

2

The 3V3 pad is directly connected to the VDD pin of the XBee. The + pad is going through voltage regulator and should be used for any power source not already regulated. The - pads are all connected to GND. So you should connect the battery power to the + pad. Although many chips probably accept a voltage of 3.7V on a 3.3V pin you should not count on it and consult the relevant datasheet in any case. I would only use the power after the voltage regulator to be on the save side.

3

Thanks.
I'll resolder then.