I several working devices using the through hole version of the XBee S2 and S2B Pro. Now migrating to put my device on a PCB, I had to switch to the S2C. According to the datasheet it should be pretty much the same, but I've been fighting to communicate with the S2C for a while now. On the S2/S2B I only used pins DOUT, DIN, and DTR, as well as having VREF to GND. The rest are not hooked up. I wired the S2C the same way and I've been trying to communicate to the S2C with no success. I've tried every baud rate possible, and all I get back from the UART is garbage. Please help! Is there a recommended way I should connect to my S2C? Thanks for your help!