3.3v DC Power Vcc	PS	+3.3V	OUT	1	2	OUT	+5V	PS	5v DC Power
Relay 1 (Alarm)	I2C SDA	GPIO2	OUT	3	4	OUT	+5V	PS	5v DC Power
Relay 2 (AC)	I2C SCL	GPIO3	OUT	5	6	OUT	GND	PS	Ground
Basement: 18.6C (64.4F) , 48.0%	PCM GClk	GPIO4	IN	7	8	OUT	GPIO14	UART Txd	Serial Out
Ground	PS	GND	OUT	9	10	IN	GPIO15	UART Rxd	Serial In
Relay 3 (Fan)	Gen	GPIO17	OUT	11	12	OUT	GPIO18	PCM Clk	Relay 4 (DTH11 Switch)
Relay 5 (Water Valve - 120Vac)	Gen	GPIO27	OUT	13	14	OUT	GND	PS	Ground
Relay 6 (Left Garage Opener)	Gen	GPIO22	OUT	15	16	IN	GPIO23	Gen	Smoke Detector (furnace)
3.3v DC Power Vcc	PS	+3.3V	OUT	17	18	IN	GPIO24	Gen	CO Detector (washroom stairs)
Relay 7 (Right Garage Opener)	SPI MOSI	GPIO10	OUT	19	20	OUT	GND	PS	Ground
Relay 8 (Furnace)	SPI MISO	GPIO9	OUT	21	22	IN	GPIO25	Gen	Moisture Sensor (lawn)
Back Door (Kitchen)	SPI SClk	GPIO11	IN	23	24	IN	GPIO8	SPI CE0	CO Detector (laundry stairs)
Ground	PS	GND	OUT	25	26	IN	GPIO7	SPI CE1	Front Door Zone
Not Used	EEPROM I2C	ID SD	OUT	27	28	OUT	ID SC	EEPROM I2C	Not Used
Front Door	GPclk1 *	GPIO5	IN	29	30	OUT	GND	PS	Ground
Basement Windows (3)	GPClk2 *	GPIO6	IN	31	32	IN	GPIO12	PWM0 *	CO Detector (furnace)
Flood Detector (furnace and laundry)	PWM1 *	GPIO13	IN	33	34	OUT	GND	PS	Ground
(Left Garage Door)	PCM FS *	GPIO19	IN	35	36	IN	GPIO16	Gen *	Garage Zone
(Right Garage Door)	Gen *	GPIO26	IN	37	38	IN	GPIO20	PCM Din*	Basement Entry Zone
Ground	PS	GND	OUT	39	40	IN	GPIO21	PCM Dout*	Back Door (Kitchen) Zone

Pi2b GPIO (105) Pi2u GPIO (108) IoT Pi3b GPIO (106) Pi3g GPIO (107)

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