This video describes how to toggle an I/O pin of a remote S1 XBEE by sending AT commands from a Base XBEE using API mode. <br />The Base XBEE is API enabled & the remote XBEE's DIO 1 (pin 19) is initially enabled Low.Frame type of 0x17 is used to send AT command within API frame and the remote LED is switched ON or OFF. <br /> <br />For more screenshots & details visit : <br /> <br />www.alselectro.wordpress.com