Keyfob HAT Pinout

note

The keyless entry solution described here only works with the AutoPi TMU CM4 and newer editions

The keyless keyfob extension HAT enables two new ports on the AutoPi device. These can be seen here during the install:

After assembly of the device, the ports can be seen from the picture below:

Pinout Conn 1 - HAT interface

Connection 1 on the Keyfob HAT is controlled locally on the keyfob extension board.

The pinout for this connector is:

Pin No.	Wire Color	Name	Description	Comments
1	Red	Vcc3v3_switched	Controllable 3.3V power supply	Controlled by the HAT's onboard MCU
2	Black	GND	Internal ground
3	Yellow	Vcc5v_switched	Controllable 5V power supply	Controlled by the HAT's onboard MCU
4	Green	DIO9	Digital input/output	Controlled by the HAT's onboard MCU
5	Blue	DIO10	Digital input/output	Controlled by the HAT's onboard MCU
6	White	DIO3	Digital input/output	Controlled by the HAT's onboard MCU
7	Orange	DIO2	Digital input/output	Controlled by the HAT's onboard MCU
8	Purple	DIO0	Digital input/output	Controlled by the HAT's onboard MCU

Pinout Conn 2 - RPI interface

Connection 2 on the Keyfob HAT is controlled from the AutoPi base board, by the standard AutoPi setup.

The pinout for this connector is:

Pin No.	Wire Color	Name	Description	Comments
1	Red	Vcc3v3_switched	Controllable 3.3V power supply	Controlled by the AutoPi base board MCU
2	Black	GND	Internal ground
3	Yellow	Vcc5v_switched	Controllable 5V power supply	Controlled by the AutoPi base board MCU
4	Green	RPI_ID_SD	Digital input/output	Controlled by the RPi
5	Blue	RPI_GPIO24	Digital input/output	Controlled by the RPi
6	White	RPI_GPIO23	Digital input/output	Controlled by the RPi
7	Orange	RPI_GPIO27	Digital input/output	Controlled by the RPi
8	Purple	RPI_ID_SC	Digital input/output	Controlled by the RPi