I have my Arduino connected to an Xbee. (not with an Xbee shield) I also have the Arduino control the power going to the Xbee to save power. I notice though when the Arduino disconnects the ground to the Xbee, The Xbee still lights up but dimmer. Will putting some kind of a resistor on the Serial lines fix this?
i think there must be a capacitor keeping it lit.
what happens when you remove power wire instead of the ground?
XBees don't light up. ???
Also, XBees are 3.3V and Arduino are 5V.
I should have mentioned I am using this http://www.parallax.com/tabid/768/ProductID/691/Default.aspx
arduinoPi:
I also have the Arduino control the power going to the Xbee to save power.
How are you doing that?
Porting signals to an unpowered device is generally undesirable. In this case, some of the XBee circuits are finding Ground through Dout/Din.
Yeah, if you're gonna switch the power to an external device, and you do it
by the gnd lead, then the signal leads are still live and you get a sneak
pathway for power through them. If you configure the Arduino output
pins as inputs when you power down the the adaptor, it should work.
Could I put some type of resistor on the serial lines to limit power? I do like and will try the idea of turning the serial lines to inputs.