Pinout

	A	B	C	D	E
1	Pin #	Name	wired to	As	Comment
2	1	Test	GND
3	2	RST	6 - Arduino	OUTPUT	via Analog devices ADG3304 logic level shifter Shift Uno 5v down to 3.3v
4	3	Vcc	Vcc		3.3v
5	4	Gnd	Gnd
6	5	NC	Gnd
7	6	SUSPEND	Vcc		3.3v
8	7	SLEEP	Gnd
9	8	NC	Gnd
10	9	PORTSEL	Gnd
11	10	BR2	Gnd		For 9600 baud, with BR1 & BR2 on Vcc
12	11	TXDO	10 - Arduino	INPUT	via Analog devices ADG3304 logic level shifter Used with Software Serial (as RX)
13	12	RXD0	11 - Arduino	OUTPUT	via Analog devices ADG3304 logic level shifter Used with Software Serial (as TX)
14	13	BR1	Vcc		3.3v
15	14	BR3	Vcc		3.3v
16	15	RSVD2	Gnd
17	16	RSVD2	Gnd
18	17	RTS	7 - Arduino	INPUT_PULLUP	via Analog devices ADG3304 logic level shifter Shift Uno 5v down to 3.3v
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