I want to communicate between two xbee S1s with microcontrollers (mbed LPC1768). I can communicate fine with the two xbees connected to a pc with USB explorer and XCTU app. However, so far, no-go with the microcontrollers in the loop.
My question relates to the RST pin (pin 5) and DTR/Sleep pin (pin 9). When I check these pins with xbee powered by the USB, both pins are high. When I log in to the XCTU they stay this way until I select the console and then the "Connect" icon. At that point, the DTR/Sleep goes low and the RST stays high. The parameter SM (Sleep Mode) is set to "NoSleep " for the xbee per the XCTU settings.
I assume that the Reset occurs when the RST pin is momentarily grounded -- so it should show high when in normal operation. I also assume that with SM=0 and no flow control that the DTR/Sleep pin is ignored. Is this correct or should I set the DTR/Sleep pin to ground rather than let it float when operating with the microcontroller.